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Were E, Viljoen A, Rasche F. Iron necessity for chlamydospore germination in Fusarium oxysporum f. sp. cubense TR4. Biometals 2023; 36:1295-1306. [PMID: 37380939 PMCID: PMC10684721 DOI: 10.1007/s10534-023-00519-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 06/19/2023] [Indexed: 06/30/2023]
Abstract
Fusarium wilt disease of banana, caused by the notorious soil-borne pathogen Fusarium oxysporum f. sp. cubense Tropical Race 4 (Foc TR4), is extremely difficult to manage. Manipulation of soil pH or application of synthetic iron chelators can suppress the disease through iron starvation, which inhibits the germination of pathogen propagules called chlamydospores. However, the effect of iron starvation on chlamydospore germination is largely unknown. In this study, scanning electron microscopy was used to assemble the developmental sequence of chlamydospore germination and to assess the effect of iron starvation and pH in vitro. Germination occurs in three distinct phenotypic transitions (swelling, polarized growth, outgrowth). Outgrowth, characterized by formation of a single protrusion (germ tube), occurred at 2 to 3 h, and a maximum value of 69.3% to 76.7% outgrowth was observed at 8 to 10 h after germination induction. Germination exhibited plasticity with pH as over 60% of the chlamydospores formed a germ tube between pH 3 and pH 11. Iron-starved chlamydospores exhibited polarized-growth arrest, characterized by the inability to form a germ tube. Gene expression analysis of rnr1 and rnr2, which encode the iron-dependent enzyme ribonucleotide reductase, showed that rnr2 was upregulated (p < 0.0001) in iron-starved chlamydospores compared to the control. Collectively, these findings suggest that iron and extracellular pH are crucial for chlamydospore germination in Foc TR4. Moreover, inhibition of germination by iron starvation may be linked to a different mechanism, rather than repression of the function of ribonucleotide reductase, the enzyme that controls growth by regulation of DNA synthesis.
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Affiliation(s)
- Evans Were
- Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, 70599, Stuttgart, Germany
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Frank Rasche
- Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, 70599, Stuttgart, Germany.
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Ma LJ, Zhang Y, Li C, Liu S, Liu C, Mostert D, Yu H, Haridas S, Webster K, Li M, Grigoriev I, Viljoen A, Yi G. Accessory genes in tropical race 4 contributed to the recent resurgence of the devastating disease of Fusarium wilt of banana. Res Sq 2023:rs.3.rs-3197485. [PMID: 37609348 PMCID: PMC10441461 DOI: 10.21203/rs.3.rs-3197485/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Fusarium wilt of banana, caused by Fusarium oxysporum f. sp. cubense (Foc), is one of the most damaging plant diseases recorded. Foc race 1 (R1) decimated the Gros Michel-based banana trade. Currently, tropical race 4 (TR4) is threatening the global production of its replacement cultivar, Cavendish banana. Population genomics and phylogenetics revealed that all Cavendish banana-infecting race 4 strains shared an evolutionary origin that is distinct from R1 strains. The TR4 genome lacks accessory or pathogenicity chromosomes, reported in other F. oxysporum genomes. Accessory genes-enriched for virulence and mitochondrial-related functions-are attached to ends of some core chromosomes. Meta-transcriptomics revealed the unique induction of the entire mitochondria-localized nitric oxide (NO) biosynthesis pathway upon TR4 infection. Empirically, we confirmed the unique induction of NO burst in TR4,suggesting the involvement of nitrosative pressure in its virulence. Targeted mutagenesis demonstrated the functional importance of accessory genes SIX1 and SIX4 as virulent factors.
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Affiliation(s)
| | | | | | | | | | - Diane Mostert
- Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa
| | | | | | | | | | - Igor Grigoriev
- US DOE Joint Genome Institute/ Lawrence Berkeley National Lab/ University of California Berkeley
| | - Altus Viljoen
- Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa
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Mmadi M, Azali HA, Mostert D, Robène I, Viljoen A. First report of Fusarium wilt of Cavendish bananas caused by Fusarium oxysporum f. sp. cubense Tropical Race 4 in the Grande Comoros Island. Plant Dis 2023. [PMID: 37526488 DOI: 10.1094/pdis-07-23-1288-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Fusarium wilt of banana, caused by the soil-borne pathogen Fusarium oxysporum f. sp. cubense (Foc), is a major constraint to banana production worldwide (Viljoen et al., 2020). Currently, Cavendish bananas are severely affected by Foc Tropical Race 4 (TR4) globally. In Africa, Foc TR4 was first detected in northern Mozambique in 2013 (Viljoen et al., 2020), and has since been found on the island of Mayotte in the Mozambique Channel off the coast of southeastern Africa (Aguayo et al., 2021). In early 2023, severe leaf-yellowing and wilting of Cavendish banana plants was observed on Cavendish banana plants at several small holder farmer properties in Grande Comoros (Ngazidja) including in Ntsinimoipanga (-11,790054 S, 43°25'47,04384 E), Batou (-11,499716 S, 43°21'51,71976''E), Madjeweni (-11,8217 S , 43°16'41''E) and Mdé (-11°41'54'' S, 43°15'20''E). When the pseudostems of these plants were split open, a reddish-brown internal discoloration of the vascular tissue became apparent. Discolored strands of diseased plants were collected, and the causal agent identified using DNA-based techniques, vegetative compatibility group (VCG) analysis and pathogenicity testing. The samples were plated onto potato dextrose agar and single-spored and isolated from individual diseased plants identified as F. oxysporum based on cultural and morphological characteristics. These include the production of white fungal colonies with a purple center, infrequent production of macroconidia, but an abundance of microconidia on short monophialides, and terminal or intercalary chlamydospores (Leslie and Summerell, 2006). Foc TR4 was identified from seven isolates by conventional (Dita et al., 2010) and quantitative-PCR (Matthews et al., 2020), and with loop-mediated isothermal amplification (LAMP) (Ordóñez et al., 2021). All seven isolates were confirmed as members of the VCG 01213/16 complex when nit-1 mutants of the unknown Foc isolates were compatible with Nit-M mutants of the Foc VCG 01213 and VCG 01216 tester strains. Two isolates were then selected for pathogenicity testing, and 2-month-old tissue culture-derived Cavendish plants (cv. Williams) inoculated by using the method described by Ndayihanzamaso et al. (2022). After 4 weeks, the Foc TR4-inoculated plants produced wilting symptoms and internal rhizome discoloration typical of Fusarium wilt. Foc TR4 was reisolated from the inoculated plants and identified by qPCR (Matthews et al. 2020), thereby fulfilling Koch's postulates. These results provide scientific proof of the presence of Foc TR4 in a second island in the Comoros archipelago. Comprehensive surveys will be conducted in all three of the Comoros Islands to assess the presence and impact of Foc TR4 to implement containment strategies. Collaborative initiatives and coordinated actions among growers and other stakeholders are needed to prevent the spread of Foc TR4 to more Southwest Indian Ocean islands and countries on the East African coasts. The importance of banana for food security and livelihoods, and the unique genetic diversity of bananas found on the Comoros islands, requires the eradication and isolation of diseased bananas on the short term, and the screening of local banana varieties for Foc TR4 resistance on the longer term.
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Affiliation(s)
- Mouzdalifa Mmadi
- Institut National de Recherché pour l'Agriculture, la Pêche et l'Environnement , Moroni, Comoros;
| | - Hamza Abdou Azali
- Institut National de Recherché pour l'Agriculture, la Pêche et l'Environnement , Moroni, Comoros;
| | - Diane Mostert
- Stellenbosch University, 26697, Plant Pathology, Stellenbosch, Western Cape, South Africa;
| | - Isabelle Robène
- CIRAD, UMR PVBMT, Pole de Protection des Plantes, 7 chemin de l'IRAT, Ligne Paradis, Saint Pierre, Réunion, 97410;
| | - Altus Viljoen
- Stellenbosch University, 26697, Plant Pathology, Stellenbosch, Western Cape, South Africa;
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4
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Mejías Herrera R, Hernández Y, Magdama F, Mostert D, Bothma S, Paredes Salgado EM, Terán D, González E, Angulo R, Angel L, Rodríguez Y, Ortega R, Viljoen A, Marys EE. First report of Fusarium wilt of Cavendish bananas caused by Fusarium oxysporum f. sp. cubense Tropical Race 4 in Venezuela. Plant Dis 2023. [PMID: 37340554 DOI: 10.1094/pdis-04-23-0781-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Fusarium wilt of banana (Musa spp.), caused by the soil-borne fungus Fusarium oxysporum f. sp. cubense (Foc), is a major constraint to banana production worldwide (Dita et al., 2018). A strain of Foc that affects Cavendish (AAA) bananas in the tropics, called Foc tropical race 4 (TR4; VCG 01213), is of particular concern. Foc TR4 was first detected in Malaysia and Indonesia around 1990 but was restricted to Southeast Asia and northern Australia until 2012. The fungus has since been reported from Africa, the Indian subcontinent, and the Middle East (Viljoen et al., 2020). Foc TR4 was detected in Colombia in 2019 and in Perú in 2021 (Reyes-Herrera et al., 2020). The incursions into Latin America and the Caribbean (LAC) triggered global concerns, as 75% of international export bananas are produced in the region. Banana production in Venezuela, however, is primarily intended for domestic consumption (Aular and Casares, 2011). In 2021 the country produced 533,190 metric tons of banana on an area of 35,896 ha, with an approximate yield of 14,853 kg/ha (FAOSTAT, 2023). In July 2022, severe leaf-yellowing, and wilting, along with internal vascular discoloration of the pseudostem, were noted in Cavendish banana plants cultivar 'Valery' in the states of Aragua (10°11'8″N; 67°34'51″W), Carabobo (10º14'24″N; 67º48'51″W), and Cojedes (9°37'44″N; 68°55'4″W). Necrotic strands from the pseudostems of diseased plants were collected for identification of the causal agent using DNA-based techniques, vegetative compatibility group (VCG) analysis and pathogenicity testing. The samples were first surface disinfected and plated onto potato dextrose agar medium. Single-spored isolates were identified as F. oxysporum based on cultural and morphological characteristics, including white colonies with purple centres, infrequent macroconidia, abundant microconidia on short monophialides, and terminal or intercalary chlamydospores (Leslie and Summerell, 2006). Foc TR4 was identified from five isolates by endpoint and quantitative-PCR using four different primer sets (Li et al. 2013; Dita et al. 2010; Aguayo et al. 2017; Matthews et al. 2020). The same isolates were identified as VCG 01213 by successfully pairing nitrate non-utilizing (nit-1) mutants of the unknown strains with Nit-M testers of Foc TR4 available at Stellenbosch University (Leslie and Summerell, 2006). For pathogenicity testing, 3-month-old Cavendish banana plants cultivar 'Williams' were inoculated with isolates from Venezuela grown on sterile millet seed (Viljoen et al., 2017). Plants developed typical Fusarium wilt symptoms 60 days after inoculation, including yellowing of leaves that progressed from the older to the younger leaves, wilting, and internal discoloration of the pseudostem. Koch's postulates were fulfilled by reisolating and identifying Foc TR4 from the plants by qPCR (Matthews et al., 2020). These results provide scientific proof of the presence of Foc TR4 in Venezuela. The Venezuelan Plant Protection Organization (INSAI) has declared Foc TR4 as a newly introduced pest (January 19, 2023), and infested banana fields were placed under quarantine. Comprehensive surveys are now conducted in all production areas in Venezuela to assess the presence and impact of Foc TR4, and information campaigns were started to make farmers aware of biosecurity protocols. Collaborative initiatives and coordinated actions among all stakeholders are needed to prevent the spread of Foc TR4 to other countries in Latin America, and to develop Foc TR4-resistant bananas (Figueiredo et al. 2023).
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Affiliation(s)
- Rafael Mejías Herrera
- Universidad Central de Venezuela (UCV), Facultad de Agronomía, Laboratorio de Bacterias Fitopatógenas, Maracay, Aragua, Venezuela, Bolivarian Republic of;
| | - Yonis Hernández
- Universidad Central de Venezuela (UCV), Facultad de Agronomía, Laboratorio de Bacterias Fitopatógenas, Maracay, Aragua, Venezuela, Bolivarian Republic of;
| | - Freddy Magdama
- Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ciencias de la Vida, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Guayas, Ecuador
- Escuela Superior Politécnica del Litoral, ESPOL, Centro de Investigaciones Biotécnologicas del Ecuador, Campus Gustavo Galindo, Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador;
| | - Diane Mostert
- Stellenbosch University, Department of Plant Pathology, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
- Stellenbosch University, 26697, Stellenbosch, Western Cape, South Africa;
| | - Sheryl Bothma
- Stellenbosch University, Department of Plant Pathology, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa;
| | - Estefany Margarita Paredes Salgado
- Escuela Superior Politécnica del Litoral, ESPOL, Centro de Investigaciones Biotecnológicas del Ecuador, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Guayas, Ecuador;
| | - Diana Terán
- Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ciencias de la Vida, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Guayas, Ecuador;
| | - Elsa González
- Universidad Central de Venezuela (UCV), Facultad de Agronomía, Laboratorio de Bacterias Fitopatógenas, Maracay, Aragua, Venezuela, Bolivarian Republic of;
| | - Rodrigo Angulo
- Universidad Central de Venezuela (UCV), Facultad de Agronomía, Laboratorio de Bacterias Fitopatógenas, Maracay, Aragua, Venezuela, Bolivarian Republic of;
| | - Liadamith Angel
- Universidad Central de Venezuela (UCV), Facultad de Agronomía, Laboratorio de Bacterias Fitopatógenas, Maracay, Aragua, Venezuela, Bolivarian Republic of;
| | - Yamila Rodríguez
- Instituto Nacional de Salud Agrícola Integral (INSAI), Av. Universidad con Av. 100, Edf. INIA, PB. El Paseo, Maracay, Aragua, Venezuela, Bolivarian Republic of;
| | - Rafael Ortega
- Instituto Venezolano de Investigaciones Científicas (IVIC), Centro de Microbiología, Laboratorio de Biotecnología y Virología Vegetal, ZIP 20632, Caracas 1020-A, Caracas, Venezuela;
| | - Altus Viljoen
- Stellenbosch University, Department of Plant Pathology, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa;
| | - Edgloris Elena Marys
- Instituto Venezolano de Investigaciones Científicas (IVIC), Centro de Microbiología y Biología Ceular, Laboratorio de Biotecnología y Virología Vegetal, ZIP 20632, Caracas 1020-A, Caracas, Venezuela;
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Chen A, Sun J, Viljoen A, Mostert D, Xie Y, Mangila L, Bothma S, Lyons R, Hřibová E, Christelová P, Uwimana B, Amah D, Pearce S, Chen N, Batley J, Edwards D, Doležel J, Crisp P, Brown AF, Martin G, Yahiaoui N, D'Hont A, Coin L, Swennen R, Aitken EAB. Genetic Mapping, Candidate Gene Identification and Marker Validation for Host Plant Resistance to the Race 4 of Fusarium oxysporum f. sp. cubense Using Musa acuminata ssp. malaccensis. Pathogens 2023; 12:820. [PMID: 37375510 DOI: 10.3390/pathogens12060820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/04/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Fusarium wilt of banana is a devastating disease that has decimated banana production worldwide. Host resistance to Fusarium oxysporum f. sp. Cubense (Foc), the causal agent of this disease, is genetically dissected in this study using two Musa acuminata ssp. Malaccensis segregating populations, segregating for Foc Tropical (TR4) and Subtropical (STR4) race 4 resistance. Marker loci and trait association using 11 SNP-based PCR markers allowed the candidate region to be delimited to a 12.9 cM genetic interval corresponding to a 959 kb region on chromosome 3 of 'DH-Pahang' reference assembly v4. Within this region, there was a cluster of pattern recognition receptors, namely leucine-rich repeat ectodomain containing receptor-like protein kinases, cysteine-rich cell-wall-associated protein kinases, and leaf rust 10 disease-resistance locus receptor-like proteins, positioned in an interspersed arrangement. Their transcript levels were rapidly upregulated in the resistant progenies but not in the susceptible F2 progenies at the onset of infection. This suggests that one or several of these genes may control resistance at this locus. To confirm the segregation of single-gene resistance, we generated an inter-cross between the resistant parent 'Ma850' and a susceptible line 'Ma848', to show that the STR4 resistance co-segregated with marker '28820' at this locus. Finally, an informative SNP marker 29730 allowed the locus-specific resistance to be assessed in a collection of diploid and polyploid banana plants. Of the 60 lines screened, 22 lines were predicted to carry resistance at this locus, including lines known to be TR4-resistant, such as 'Pahang', 'SH-3362', 'SH-3217', 'Ma-ITC0250', and 'DH-Pahang/CIRAD 930'. Additional screening in the International Institute for Tropical Agriculture's collection suggests that the dominant allele is common among the elite 'Matooke' NARITA hybrids, as well as in other triploid or tetraploid hybrids derived from East African highland bananas. Fine mapping and candidate gene identification will allow characterization of molecular mechanisms underlying the TR4 resistance. The markers developed in this study can now aid the marker-assisted selection of TR4 resistance in breeding programs around the world.
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Affiliation(s)
- Andrew Chen
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4067, Australia
| | - Jiaman Sun
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4067, Australia
- School of Life Science, Jiaying University, Meizhou 514015, China
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Stellenbosch 7600, South Africa
| | - Diane Mostert
- Department of Plant Pathology, Stellenbosch University, Stellenbosch 7600, South Africa
| | - Yucong Xie
- Department of Biology, Duke University, Durham, NC 27708-0338, USA
| | - Leroy Mangila
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4067, Australia
| | - Sheryl Bothma
- Department of Plant Pathology, Stellenbosch University, Stellenbosch 7600, South Africa
| | - Rebecca Lyons
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4067, Australia
| | - Eva Hřibová
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Haná for Bio-Technological and Agricultural Research, CZ-77900 Olomouc, Czech Republic
| | - Pavla Christelová
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Haná for Bio-Technological and Agricultural Research, CZ-77900 Olomouc, Czech Republic
| | - Brigitte Uwimana
- International Institute of Tropical Agriculture, Kampala P.O. Box 7878, Uganda
| | - Delphine Amah
- International Institute of Tropical Agriculture, Ibadan PMB 5320, Nigeria
| | - Stephen Pearce
- Sustainable Soils and Crops, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - Ning Chen
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4067, Australia
| | - Jacqueline Batley
- School of Biological Sciences, The University of Western Australia, Perth, WA 6009, Australia
| | - David Edwards
- School of Biological Sciences, The University of Western Australia, Perth, WA 6009, Australia
- The Centre for Applied Bioinformatics, University of Western Australia, Crawley, Perth, WA 6009, Australia
| | - Jaroslav Doležel
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Haná for Bio-Technological and Agricultural Research, CZ-77900 Olomouc, Czech Republic
| | - Peter Crisp
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4067, Australia
| | - Allan F Brown
- International Institute of Tropical Agriculture, Arusha P.O. Box 447, Tanzania
| | - Guillaume Martin
- CIRAD, UMR AGAP Institut, F-34398 Montpellier, France
- UMR AGAP Institut, Université de Montpellier, CIRAD, INRAE, Institut Agro, F-34398 Montpellier, France
| | - Nabila Yahiaoui
- CIRAD, UMR AGAP Institut, F-34398 Montpellier, France
- UMR AGAP Institut, Université de Montpellier, CIRAD, INRAE, Institut Agro, F-34398 Montpellier, France
| | - Angelique D'Hont
- CIRAD, UMR AGAP Institut, F-34398 Montpellier, France
- UMR AGAP Institut, Université de Montpellier, CIRAD, INRAE, Institut Agro, F-34398 Montpellier, France
| | - Lachlan Coin
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC 3004, Australia
| | - Rony Swennen
- International Institute of Tropical Agriculture, Kampala P.O. Box 7878, Uganda
- Division of Crop Biotechnics, Laboratory of Tropical Crop Improvement, Katholieke Universiteit Leuven, 3001 Leuven, Belgium
| | - Elizabeth A B Aitken
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4067, Australia
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Viljoen A, Oosthuizen MK. Dim light at night affects the locomotor activity of nocturnal African pygmy mice ( Mus minutoides) in an intensity-dependent manner. Proc Biol Sci 2023; 290:20230526. [PMID: 37072046 PMCID: PMC10113032 DOI: 10.1098/rspb.2023.0526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 03/27/2023] [Indexed: 04/20/2023] Open
Abstract
Rodents are integral components of ecosystems as they provide several important ecosystem services. Despite their importance as prey, pollinators and seed distributors, African rodents are largely understudied. The effect of anthropogenic changes such as artificial light at night extends past urban areas to peri-urban and rural habitats, and can have profound effects on entire ecosystems. We investigated the effect of dim light at night (dLAN) on the locomotor activity rhythms of the African pygmy mouse (Mus minutoides). Pygmy mice showed a dramatic, intensity-dependent reduction in their locomotor activity when subjected to dLAN, which was accompanied by a delay in the activity onset. We also considered masking responses with a dark pulse (DP) during the day and a light pulse at night. All animals became inactive in response to a light pulse during the night, whereas approximately half of the animals showed activity during a DP in the day. Our results suggest that the African pygmy mouse is highly sensitive to light and that their activity is strongly masked by light. In their natural environment, vegetation could shield pygmy mice against high light levels; however, other anthropogenic disturbances can alter the behaviour of these animals and could affect their survival.
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Affiliation(s)
- A. Viljoen
- Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
| | - M. K. Oosthuizen
- Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
- Mammal Research Institute, University of Pretoria, Pretoria 0002, South Africa
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7
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Van Coller GJ, Rose LJ, Boutigny AL, Ward TJ, Lamprecht SC, Viljoen A. The distribution and type B trichothecene chemotype of Fusarium species associated with head blight of wheat in South Africa during 2008 and 2009. PLoS One 2022; 17:e0275084. [PMID: 36156602 PMCID: PMC9512189 DOI: 10.1371/journal.pone.0275084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 09/09/2022] [Indexed: 11/19/2022] Open
Abstract
Fusarium head blight (FHB) of wheat occurs commonly in irrigation regions of South Africa and less frequently in dryland regions. Previous surveys of Fusarium species causing FHB identified isolates using morphological characters only. This study reports on a comprehensive characterisation of FHB pathogens conducted in 2008 and 2009. Symptomatic wheat heads were collected from the Northern Cape, KwaZulu-Natal (KZN), Bushveld and eastern Free State (irrigation regions), and from one field in the Western Cape (dryland region). Fusarium isolates were identified with species-specific primers or analysis of partial EF-1α sequences. A representative subset of isolates was characterized morphologically. In total, 1047 Fusarium isolates were collected, comprising 24 species from seven broad species complexes. The F. sambucinum (FSAMSC) and F. incarnatum-equiseti species complexes (FIESC) were most common (83.5% and 13.3% of isolates, respectively). The F. chlamydosporum (FCSC), F. fujikuroi (FFSC), F. oxysporum (FOSC), F. solani (FSSC), and F. tricinctum species complexes (FTSC) were also observed. Within the FSAMSC, 90.7% of isolates belonged to the F. graminearum species complex (FGSC), accounting for 75.7% of isolates. The FGSC was the dominant Fusaria in all four irrigation regions. F. pseudograminearum dominated at the dryland field in the Western Cape. The Northern Cape had the highest species diversity (16 Fusarium species from all seven species complexes). The type B trichothecene chemotype of FGSC and related species was inferred with PCR. Chemotype diversity was limited (15-ADON = 90.1%) and highly structured in relation to species differences. These results expand the known species diversity associated with FHB in South Africa and include first reports of F. acuminatum, F. armeniacum, F. avenaceum, F. temperatum, and F. pseudograminearum from wheat heads in South Africa, and of F. brachygibbosum, F. lunulosporum and F. transvaalense from wheat globally. Potentially novel species were identified within the FCSC, FFSC, FOSC, FSAMSC, FIESC and FTSC.
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Affiliation(s)
- Gerhardus J. Van Coller
- Directorate: Plant Science, Western Cape Department of Agriculture, Elsenburg, South Africa
- Department of Plant Pathology, Stellenbosch University, Matieland, South Africa
- * E-mail:
| | - Lindy J. Rose
- Department of Plant Pathology, Stellenbosch University, Matieland, South Africa
| | - Anne-Laure Boutigny
- Department of Plant Pathology, Stellenbosch University, Matieland, South Africa
| | - Todd J. Ward
- United States Department of Agriculture–Agricultural Research Service, Peoria, Illinois, United States of America
| | | | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Matieland, South Africa
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8
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Clarke A, Bodini S, Douglas L, Catapano A, De Luca L, Hollstein T, Payne J, Pirro M, Viljoen A, Vogt A, Horne R. A behavioural science research programme to understand the barriers to achieving recommended LDL cholesterol goals. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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9
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Were E, Schöne J, Viljoen A, Rasche F. De novo synthesis of ferrichrome by Fusarium oxysporum f. sp. cubense TR4 in response to iron starvation. Fungal Biol 2022; 126:521-527. [DOI: 10.1016/j.funbio.2022.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/03/2022] [Accepted: 05/24/2022] [Indexed: 11/04/2022]
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10
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Zhan N, Kuang M, Li C, Liu S, Deng G, Viljoen A, Yi G, Sheng O. First Report of Fusarium Wilt of Iholena Banana (Musa spp.) Caused by Fusarium oxysporum f. sp. cubense Tropical Race 4 in China. Plant Dis 2022; 106:3204. [PMID: 35467941 DOI: 10.1094/pdis-11-21-2621-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Fusarium wilt, caused by Fusarium oxysporum f. sp. cubense (Foc), has been considered as the most devastating disease affecting bananas (Musa spp.) worldwide. A highly virulent strain of Foc, known as tropical race 4 (TR4), has been detected in the southeast Asia in the 1990s, and has since spread to western Asia, Australia, the Middle East, southern Africa, and South America (Viljoen et al. 2020). Foc TR4 can cause severe yield losses in Cavendish (AAA), Gros Michel (AAA), Silk (AAB), Pisang Awak (ABB) and Bluggoe (ABB) bananas (Ploetz et al. 2006). However, cooking bananas such as plantain (AAB) and Matooke (AAA) bananas, appear to be resistant (Zuo et al. 2017). Iholena bananas (AAB), a subgroup of varieties related to plantains (also known as Pacific plantains), is an important staple food in the Pacific Islands where it was domesticated. It is also popular in Peru, probably due to its nutritional value (Kepler et al. 2011) and is wildly cultivated in other South American countries (Dita et al. 2013). In December 2019, typical symptoms of banana Fusarium wilt were observed on Iholena accession 'Pacific Plantain' (ITC0210) in experimental fields located in Dongguan, Guangdong Province of China. The symptoms included leaf yellowing and pseudostem splitting. The vascular tissue inside the pseudostems was dark red to brown, and the inner rhizomes yellowish-brown. Vascular tissues from three diseased plants were sampled aseptically and placed on potato dextrose agar (PDA) containing 0.05 g/liter kanamycin. Fungal colonies typical of F. oxysporum developed rapidly, with purple-tinged white aerial mycelia and an abundance of microconidia borne in false heads on short microconidia (Nelson et al. 1983). Chlamydospores were produced singly or in pairs in hyphae and macroconidia. Molecular identification was performed using Foc race 4-specific primers (Lin et al. 2009), Foc TR4-specific primers (Dita et al. 2010), Foc race 1 and Foc STR4-specific primers (Ndayihanzamaso et al. 2020). Amplicons of expected sizes were obtained for Foc TR4 and race 4, but not for Foc race 1 and STR4. Sequencing of the ITS and 18S rDNA from the three Iholena isolates and BLAST result showed a 100% similarity to the Foc TR4 reference sequences in GenBank (Foc II5, PRJNA73539 and PRJNA56513) to prove that the isolates were Foc TR4. Pathogenicity of the three isolates from Iholena bananas was determined by infecting 4-month-old Cavendish cv. 'Grand Nain' bananas and three Iholena accessions, 'Pacific Plantain' 'Tigua' and 'Uzakan', under greenhouse conditions by root immersion in a Foc conidial suspension and soil drenching at 106 conidia/ml (Dita, 2010). Control plants were treated with sterile distilled water. Three replications of five plantlets were used for each accession. After 35 days, the inoculated plantlets developed typical Fusarium wilt symptoms such as yellowing of the older leaves and discoloration of the inner rhizome. The control plants did not develop symptoms. To complete Koch's postulates, the fungus was re-isolated from inoculated plants and identified as Foc TR4 by PCR (Dita et al, 2010). The susceptibility of 'Tigua' and 'Uzakan' was also confirmed in Foc TR4-infested field trials, with both accessions developing severe Fusarium wilt symptoms. The susceptibility of Iholena bananas to Foc TR4 is of significant concern to all countries where this subgroup is cultivated for major food source, including Peru and other South American countries.
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Affiliation(s)
- Ni Zhan
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangzhou, China;
| | - Mengyu Kuang
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China;
| | - Chunyu Li
- Dafeng 2nd street No 80Tianhe DistrictGuangzhou, Guangdong, China, 510640;
| | | | - Guiming Deng
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China;
| | - Altus Viljoen
- University of Stellenbosch, Plant Pathology, Private Bag X1, Matieland, Stellenbosch, Western Cape, South Africa, 7600;
| | - Ganjun Yi
- Insititute of Fruit Tree Research, Guangdong Academy of Agriculltural Science, Wushan Dafen 2th Street 80, Tianhe District, Guangzhou City, China, Guanghzou, Guangdong, China, 510640
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, China;
| | - Ou Sheng
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou , China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangzhou, China;
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11
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Del Ponte EM, Moreira GM, Ward TJ, O'Donnell K, Nicolli CP, Machado FJ, Duffeck MR, Alves KS, Tessmann DJ, Waalwijk C, van der Lee T, Zhang H, Chulze SN, Stenglein SA, Pan D, Vero S, Vaillancourt LJ, Schmale DG, Esker PD, Moretti A, Logrieco AF, Kistler HC, Bergstrom GC, Viljoen A, Rose LJ, van Coller GJ, Lee T. Fusarium graminearum Species Complex: A Bibliographic Analysis and Web-Accessible Database for Global Mapping of Species and Trichothecene Toxin Chemotypes. Phytopathology 2022; 112:741-751. [PMID: 34491796 DOI: 10.1094/phyto-06-21-0277-rvw] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Fusarium graminearum is ranked among the five most destructive fungal pathogens that affect agroecosystems. It causes floral diseases in small grain cereals including wheat, barley, and oats, as well as maize and rice. We conducted a systematic review of peer-reviewed studies reporting species within the F. graminearum species complex (FGSC) and created two main data tables. The first contained summarized data from the articles including bibliographic, geographic, methodological (ID methods), host of origin and species, while the second data table contains information about the described strains such as publication, isolate code(s), host/substrate, year of isolation, geographical coordinates, species and trichothecene genotype. Analyses of the bibliographic data obtained from 123 publications from 2000 to 2021 by 498 unique authors and published in 40 journals are summarized. We describe the frequency of species and chemotypes for 16,274 strains for which geographical information was available, either provided as raw data or extracted from the publications, and sampled across six continents and 32 countries. The database and interactive interface are publicly available, allowing for searches, summarization, and mapping of strains according to several criteria including article, country, host, species and trichothecene genotype. The database will be updated as new articles are published and should be useful for guiding future surveys and exploring factors associated with species distribution such as climate and land use. Authors are encouraged to submit data at the strain level to the database, which is accessible at https://fgsc.netlify.app.
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Affiliation(s)
- Emerson M Del Ponte
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Gláucia M Moreira
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Todd J Ward
- Agricultural Research Service, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Peoria 61604, U.S.A
| | - Kerry O'Donnell
- Agricultural Research Service, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Peoria 61604, U.S.A
| | - Camila P Nicolli
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Franklin J Machado
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Maíra R Duffeck
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Kaique S Alves
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Dauri J Tessmann
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR, 87020-900 Brazil
| | - Cees Waalwijk
- Biointeractions & Plant Health, Wageningen Plant Research, Wageningen, 6708PB, The Netherlands
| | - Theo van der Lee
- Biointeractions & Plant Health, Wageningen Plant Research, Wageningen, 6708PB, The Netherlands
| | - Hao Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Sofia N Chulze
- Universidad Nacional de Río Cuarto, Río Cuarto, 5800 Argentina
| | - Sebastian A Stenglein
- Laboratorio de Biología Funcional y Biotecnología, Facultad de Agronomía, Universidad Nacional del Centro, Buenos Aires, 7300, Argentina
| | - Dinorah Pan
- Universidad de la República, Facultad de Ciencias-Facultad de Ingeniería, Montevideo, 11800, Uruguay
| | - Silvana Vero
- Universidad de la República, Facultad de Ciencias-Facultad de Ingeniería, Montevideo, 11800, Uruguay
| | - Lisa J Vaillancourt
- Department of Plant Pathology, University of Kentucky, Lexington, 40546-0312, U.S.A
| | - David G Schmale
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, 24061-0390, U.S.A
| | - Paul D Esker
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, 16802, U.S.A
| | - Antonio Moretti
- National Research Council of Research, Institute of Sciences of Food Production, 70126 Bari, Italy
| | - Antonio F Logrieco
- National Research Council of Research, Institute of Sciences of Food Production, 70126 Bari, Italy
| | - H Corby Kistler
- Agricultural Research Service, Cereal Disease Laboratory, U.S. Department of Agriculture, St. Paul 55108, U.S.A
| | - Gary C Bergstrom
- School of Integrative Plant Science, Plant Pathology and Plant-Microbe Biology Section, Cornell University, Ithaca 14853-5904, U.S.A
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Lindy J Rose
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Gert J van Coller
- Plant Science, Western Cape Department of Agriculture, Elsenburg, 7607, South Africa
| | - Theresa Lee
- Microbial Safety Team, National Institute of Agricultural Sciences, Wanju, 55365, Republic of Korea
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12
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Huang H, Zhang X, Zhang Y, Yi G, Xie J, Viljoen A, Wang W, Mostert D, Fu G, Peng C, Xiang D, Li C, Liu S. FocECM33, a GPI-anchored protein, regulates vegetative growth and virulence in Fusarium oxysporum f. sp. cubense tropical race 4. Fungal Biol 2022; 126:213-223. [DOI: 10.1016/j.funbio.2021.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/21/2021] [Accepted: 12/24/2021] [Indexed: 11/04/2022]
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13
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Ullah S, Mostert D, Serfontein K, Viljoen A. The Survival and Treatment of Fusarium oxysporum f. sp. cubense in Water. J Fungi (Basel) 2021; 7:jof7100796. [PMID: 34682219 PMCID: PMC8539256 DOI: 10.3390/jof7100796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 12/02/2022] Open
Abstract
Fusarium oxysporum f. sp cubense (Foc), the causal agent of Fusarium wilt, is one of the most devastating constraints to banana production worldwide. The spread of Foc in water is particularly concerning, as infested water can rapidly contaminate disease-free areas. The objectives of this study were to investigate the survival of Foc in water and to test the effectiveness of water treatment with chlorine, ozone, UV, and peracetic acid. The study indicated that Foc spores can survive in water for more than 120 days, but that viability was reduced in stagnant water, probably due to anaerobic conditions when spores settled at the bottom. It is therefore recommended that surface water be extracted and treated before it is used for irrigation. The efficacy of all water treatments was reduced in the presence of soil, implying that water needs to be soil-free before treatment. The use of peracetic acid is recommended to treat Foc-contaminated water, as it is safe for use and does not require installation costs although it is effective at treating Foc-contaminated water, ozone would require significant input costs and chlorine can produce harmful disinfection by-products. UV would be impractical for field application because of the high doses required to eliminate Foc.
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Affiliation(s)
- Sahabne Ullah
- Department of Plant Pathology, Stellenbosch University, Stellenbosch 7602, Western Cape, South Africa; (S.U.); (A.V.)
| | - Diane Mostert
- Department of Plant Pathology, Stellenbosch University, Stellenbosch 7602, Western Cape, South Africa; (S.U.); (A.V.)
- Correspondence:
| | - Kobus Serfontein
- ICA International Chemicals, Stellenbosch 7601, Western Cape, South Africa;
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Stellenbosch 7602, Western Cape, South Africa; (S.U.); (A.V.)
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14
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Kimunye J, Were E, Swennen R, Viljoen A, Mahuku G. Sources of resistance to Pseudocercospora fijiensis, the cause of black Sigatoka in banana. Plant Pathol 2021; 70:1651-1664. [PMID: 34588709 PMCID: PMC8453767 DOI: 10.1111/ppa.13408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/26/2021] [Accepted: 05/01/2021] [Indexed: 05/25/2023]
Abstract
Black Sigatoka, caused by Pseudocercospora fijiensis, is one of the most devastating diseases of banana. In commercial banana-growing systems, black Sigatoka is primarily managed by fungicides. This mode of disease management is not feasible for resource-limited smallholder farmers. Therefore, bananas resistant to P. fijiensis provide a practical solution for managing the disease, especially under smallholder farming systems. Most banana and plantain hybrids with resistance to P. fijiensis were developed using few sources of resistance, which include Calcutta 4 and Pisang Lilin. To broaden the pool of resistance sources to P. fijiensis, 95 banana accessions were evaluated under field conditions in Sendusu, Uganda. Eleven accessions were resistant to P. fijiensis. Black Sigatoka symptoms did not progress past Stage 2 (narrow brown streaks) in the diploid accessions Pahang (AA), Pisang KRA (AA), Malaccensis 0074 (AA), Long Tavoy (AA), M.A. Truncata (AA), Tani (BB), and Balbisiana (BB), a response similar to the resistant control Calcutta 4. These accessions are potential sources of P. fijiensis resistance and banana breeding programmes can use them to broaden the genetic base for resistance to P. fijiensis.
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Affiliation(s)
- Janet Kimunye
- International Institute of Tropical AgricultureKampalaUganda
- Department of Plant PathologyPrivate Bag X1Stellenbosch UniversityMatielandSouth Africa
| | - Evans Were
- Institute of Agricultural Sciences in the Tropics (Hans‐Ruthenberg‐InstituteUniversity of HohenheimStuttgartGermany
| | - Rony Swennen
- Laboratory of Tropical Crop ImprovementKU LeuvenLeuvenBelgium
- International Institute of Tropical AgricultureArushaTanzania
| | - Altus Viljoen
- Department of Plant PathologyPrivate Bag X1Stellenbosch UniversityMatielandSouth Africa
| | - George Mahuku
- International Institute of Tropical AgricultureKampalaUganda
- International Institute of Tropical AgricultureDar es SalaamTanzania
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15
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Geiser DM, Al-Hatmi AMS, Aoki T, Arie T, Balmas V, Barnes I, Bergstrom GC, Bhattacharyya MK, Blomquist CL, Bowden RL, Brankovics B, Brown DW, Burgess LW, Bushley K, Busman M, Cano-Lira JF, Carrillo JD, Chang HX, Chen CY, Chen W, Chilvers M, Chulze S, Coleman JJ, Cuomo CA, de Beer ZW, de Hoog GS, Del Castillo-Múnera J, Del Ponte EM, Diéguez-Uribeondo J, Di Pietro A, Edel-Hermann V, Elmer WH, Epstein L, Eskalen A, Esposto MC, Everts KL, Fernández-Pavía SP, da Silva GF, Foroud NA, Fourie G, Frandsen RJN, Freeman S, Freitag M, Frenkel O, Fuller KK, Gagkaeva T, Gardiner DM, Glenn AE, Gold SE, Gordon TR, Gregory NF, Gryzenhout M, Guarro J, Gugino BK, Gutierrez S, Hammond-Kosack KE, Harris LJ, Homa M, Hong CF, Hornok L, Huang JW, Ilkit M, Jacobs A, Jacobs K, Jiang C, Jiménez-Gasco MDM, Kang S, Kasson MT, Kazan K, Kennell JC, Kim HS, Kistler HC, Kuldau GA, Kulik T, Kurzai O, Laraba I, Laurence MH, Lee T, Lee YW, Lee YH, Leslie JF, Liew ECY, Lofton LW, Logrieco AF, López-Berges MS, Luque AG, Lysøe E, Ma LJ, Marra RE, Martin FN, May SR, McCormick SP, McGee C, Meis JF, Migheli Q, Mohamed Nor NMI, Monod M, Moretti A, Mostert D, Mulè G, Munaut F, Munkvold GP, Nicholson P, Nucci M, O'Donnell K, Pasquali M, Pfenning LH, Prigitano A, Proctor RH, Ranque S, Rehner SA, Rep M, Rodríguez-Alvarado G, Rose LJ, Roth MG, Ruiz-Roldán C, Saleh AA, Salleh B, Sang H, Scandiani MM, Scauflaire J, Schmale DG, Short DPG, Šišić A, Smith JA, Smyth CW, Son H, Spahr E, Stajich JE, Steenkamp E, Steinberg C, Subramaniam R, Suga H, Summerell BA, Susca A, Swett CL, Toomajian C, Torres-Cruz TJ, Tortorano AM, Urban M, Vaillancourt LJ, Vallad GE, van der Lee TAJ, Vanderpool D, van Diepeningen AD, Vaughan MM, Venter E, Vermeulen M, Verweij PE, Viljoen A, Waalwijk C, Wallace EC, Walther G, Wang J, Ward TJ, Wickes BL, Wiederhold NP, Wingfield MJ, Wood AKM, Xu JR, Yang XB, Yli-Mattila T, Yun SH, Zakaria L, Zhang H, Zhang N, Zhang SX, Zhang X. Phylogenomic Analysis of a 55.1-kb 19-Gene Dataset Resolves a Monophyletic Fusarium that Includes the Fusarium solani Species Complex. Phytopathology 2021; 111:1064-1079. [PMID: 33200960 DOI: 10.1094/phyto-08-20-0330-le] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Scientific communication is facilitated by a data-driven, scientifically sound taxonomy that considers the end-user's needs and established successful practice. In 2013, the Fusarium community voiced near unanimous support for a concept of Fusarium that represented a clade comprising all agriculturally and clinically important Fusarium species, including the F. solani species complex (FSSC). Subsequently, this concept was challenged in 2015 by one research group who proposed dividing the genus Fusarium into seven genera, including the FSSC described as members of the genus Neocosmospora, with subsequent justification in 2018 based on claims that the 2013 concept of Fusarium is polyphyletic. Here, we test this claim and provide a phylogeny based on exonic nucleotide sequences of 19 orthologous protein-coding genes that strongly support the monophyly of Fusarium including the FSSC. We reassert the practical and scientific argument in support of a genus Fusarium that includes the FSSC and several other basal lineages, consistent with the longstanding use of this name among plant pathologists, medical mycologists, quarantine officials, regulatory agencies, students, and researchers with a stake in its taxonomy. In recognition of this monophyly, 40 species described as genus Neocosmospora were recombined in genus Fusarium, and nine others were renamed Fusarium. Here the global Fusarium community voices strong support for the inclusion of the FSSC in Fusarium, as it remains the best scientific, nomenclatural, and practical taxonomic option available.
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Affiliation(s)
- David M Geiser
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | | | - Takayuki Aoki
- Genetic Resources Center, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Tsutomu Arie
- Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Virgilio Balmas
- Dipartimento di Agraria, Università degli Studi di Sassari, Sassari, Italy
| | - Irene Barnes
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | - Gary C Bergstrom
- Plant Pathology and Plant-Microbe Biology Section, Cornell University, Ithaca, NY 14853, U.S.A
| | | | - Cheryl L Blomquist
- Plant Pest Diagnostics Branch, California Department of Food and Agriculture, Sacramento, CA 95832, U.S.A
| | - Robert L Bowden
- Hard Winter Wheat Genetics Research Unit, U.S. Department of Agriculture Agricultural Research Service (USDA-ARS), Manhattan, KS 66506, U.S.A
| | - Balázs Brankovics
- Wageningen Plant Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Daren W Brown
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - Lester W Burgess
- Sydney Institute of Agriculture, Faculty of Science, University of Sydney, Sydney, Australia
| | - Kathryn Bushley
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN 55108, U.S.A
| | - Mark Busman
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - José F Cano-Lira
- Mycology Unit and IISPV, Universitat Rovira i Virgili Medical School, Reus, Spain
| | - Joseph D Carrillo
- Gulf Coast Research and Education Center, University of Florida, Wimauma, FL 33598, U.S.A
| | - Hao-Xun Chang
- Department of Plant Pathology and Microbiology, National Taiwan University, Taipei, Taiwan
| | - Chi-Yu Chen
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - Wanquan Chen
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agriculture Sciences, Beijing, People's Republic of China
| | - Martin Chilvers
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A
| | - Sofia Chulze
- Research Institute on Mycology and Mycotoxicology, National Scientific and Technical Research Council, National University of Rio Cuarto, Rio Cuarto, Córdoba, Argentina
| | - Jeffrey J Coleman
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL 36849, U.S.A
| | | | - Z Wilhelm de Beer
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | - G Sybren de Hoog
- Department of Medical Mycology and Infectious Diseases, Center of Expertise in Mycology, Radboud University Medical Center, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | | | - Emerson M Del Ponte
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | | | - Antonio Di Pietro
- Departamento de Genética, Campus de Excelencia Internacional Agroalimentario, Universidad de Córdoba, Córdoba, Spain
| | | | - Wade H Elmer
- Department of Plant Pathology and Ecology, Connecticut Agricultural Experiment Station, New Haven, CT 06504, U.S.A
| | - Lynn Epstein
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
| | - Akif Eskalen
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
| | | | - Kathryne L Everts
- Wye Research and Education Center, University of Maryland, Queenstown, MD 21658, U.S.A
| | - Sylvia P Fernández-Pavía
- Laboratorio de Patología Vegetal, Instituto de Investigaciones Agropecuarias y Forestales, Universidad Michoacana de San Nicolás de Hidalgo, Tarímbaro, Michoacán 58880, México
| | | | - Nora A Foroud
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta T1J 4B1, Canada
| | - Gerda Fourie
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | - Rasmus J N Frandsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Stanley Freeman
- Department of Plant Pathology and Weed Research, Agricultural Research Organization, Volcani Center, Rishon LeZion, Israel
| | - Michael Freitag
- Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, U.S.A
| | - Omer Frenkel
- Department of Plant Pathology and Weed Research, Agricultural Research Organization, Volcani Center, Rishon LeZion, Israel
| | - Kevin K Fuller
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, U.S.A
| | - Tatiana Gagkaeva
- Laboratory of Mycology and Phytopathology, All-Russian Institute of Plant Protection, St. Petersburg-Pushkin, Russia
| | | | - Anthony E Glenn
- Toxicology and Mycotoxin Research Unit, USDA-ARS, Athens, GA 30605, U.S.A
| | - Scott E Gold
- Toxicology and Mycotoxin Research Unit, USDA-ARS, Athens, GA 30605, U.S.A
| | - Thomas R Gordon
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
| | - Nancy F Gregory
- Department of Plant and Soil Sciences, University of Delaware, DE 19716, U.S.A
| | - Marieka Gryzenhout
- Department of Genetics, University of the Free State, Bloemfontein, South Africa
| | - Josep Guarro
- Unitat de Microbiologia, Departament de Ciències Mèdiques Bàsiques, Universitat Rovira i Virgili, Reus, Spain
| | - Beth K Gugino
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | | | - Kim E Hammond-Kosack
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Linda J Harris
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario K1A 0C6, Canada
| | - Mónika Homa
- MTA-SZTE Fungal Pathogenicity Mechanisms Research Group, Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary
| | - Cheng-Fang Hong
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - László Hornok
- Institute of Plant Protection, Szent István University, Gödöllő, Hungary
| | - Jenn-Wen Huang
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - Macit Ilkit
- Division of Mycology, Faculty of Medicine, University of Çukurova, Sarıçam, Adana, Turkey
| | - Adriaana Jacobs
- Biosystematics Unit, Plant Health and Protection, Agricultural Research Council, Pretoria, South Africa
| | - Karin Jacobs
- Department of Microbiology, Stellenbosch University, Matieland, South Africa
| | - Cong Jiang
- College of Plant Protection, Northwest Agriculture and Forestry University, Xianyang, People's Republic of China
| | - María Del Mar Jiménez-Gasco
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Seogchan Kang
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Matthew T Kasson
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV 26506, U.S.A
| | - Kemal Kazan
- CSIRO Agriculture and Food, St. Lucia, Australia
| | - John C Kennell
- Biology Department, St. Louis University, St. Louis, MO 63101, U.S.A
| | - Hye-Seon Kim
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - H Corby Kistler
- USDA-ARS Cereal Disease Laboratory, University of Minnesota, St. Paul, MN 55108, U.S.A
| | - Gretchen A Kuldau
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Tomasz Kulik
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Oliver Kurzai
- German National Reference Center for Invasive Fungal Infections NRZMyk, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, Jena, Germany
| | - Imane Laraba
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - Matthew H Laurence
- Australian Institute of Botanical Science, Royal Botanic Garden and Domain Trust, Sydney, Australia
| | - Theresa Lee
- Microbial Safety Team, National Institute of Agricultural Sciences, Rural Development Administration, Wanju, Republic of Korea
| | - Yin-Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Yong-Hwan Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - John F Leslie
- Department of Plant Pathology, Kansas State University, Manhattan, KS 66506, U.S.A
| | - Edward C Y Liew
- Australian Institute of Botanical Science, Royal Botanic Garden and Domain Trust, Sydney, Australia
| | - Lily W Lofton
- Toxicology and Mycotoxin Research Unit, USDA-ARS, Athens, GA 30605, U.S.A
| | - Antonio F Logrieco
- Institute of Sciences of Food Production, Research National Council, Bari, Italy
| | - Manuel S López-Berges
- Departamento de Genética, Campus de Excelencia Internacional Agroalimentario, Universidad de Córdoba, Córdoba, Spain
| | - Alicia G Luque
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Centro de Referencia de Micología, Universidad Nacional de Rosario, Rosario, Argentina
| | - Erik Lysøe
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research, Høgskoleveien, Ås, Norway
| | - Li-Jun Ma
- Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst, MA 01003, U.S.A
| | - Robert E Marra
- Department of Plant Pathology and Ecology, Connecticut Agricultural Experiment Station, New Haven, CT 06504, U.S.A
| | - Frank N Martin
- Crop Improvement and Protection Research Unit, ARS-USDA, Salinas, CA 93905, U.S.A
| | - Sara R May
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Susan P McCormick
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - Chyanna McGee
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Jacques F Meis
- Department of Medical Mycology and Infectious Diseases, Center of Expertise in Mycology, Radboud University Medical Center, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Quirico Migheli
- Dipartimento di Agraria and Nucleo Ricerca Desertificazione, Università degli Studi di Sassari, Sassari, Italy
| | - N M I Mohamed Nor
- School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Michel Monod
- Laboratoire de Mycologie, Service de Dermatologie, Centre Hospitalier Universitaire Vaudois, 1011 Lausanne, Switzerland
| | - Antonio Moretti
- Institute of Sciences of Food Production, Research National Council, Bari, Italy
| | - Diane Mostert
- Department of Plant Pathology, Stellenbosch University, Matieland, South Africa
| | - Giuseppina Mulè
- Institute of Sciences of Food Production, Research National Council, Bari, Italy
| | | | - Gary P Munkvold
- Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, U.S.A
| | - Paul Nicholson
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich, United Kingdom
| | - Marcio Nucci
- Hospital Universitário, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Kerry O'Donnell
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - Matias Pasquali
- Department of Food, Environmental and Nutritional Sciences, University of Milano, Milan, Italy
| | - Ludwig H Pfenning
- Departamento de Fitopatologia, Universidade Federal de Lavras, Lavras, Minas Gerais State, Brazil
| | - Anna Prigitano
- Department of Biomedical Sciences for Health, University of Milano, Milan, Italy
| | - Robert H Proctor
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - Stéphane Ranque
- Institut Hospitalier Universitaire Méditerranée Infection, Aix Marseille University, Marseille, France
| | - Stephen A Rehner
- Mycology and Nematology Genetic Diversity and Biology Laboratory, USDA-ARS, Beltsville, MD 20705, U.S.A
| | - Martijn Rep
- Swammerdam Institute for Life Science, University of Amsterdam, Amsterdam, The Netherlands
| | - Gerardo Rodríguez-Alvarado
- Laboratorio de Patología Vegetal, Instituto de Investigaciones Agropecuarias y Forestales, Universidad Michoacana de San Nicolás de Hidalgo, Tarímbaro, Michoacán 58880, México
| | - Lindy Joy Rose
- Department of Plant Pathology, Stellenbosch University, Matieland, South Africa
| | - Mitchell G Roth
- Department of Plant Pathology, University of Wisconsin, Madison, WI 53706, U.S.A
| | - Carmen Ruiz-Roldán
- Departamento de Genética, Campus de Excelencia Internacional Agroalimentario, Universidad de Córdoba, Córdoba, Spain
| | - Amgad A Saleh
- Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Baharuddin Salleh
- School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Hyunkyu Sang
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, Republic of Korea
| | - María Mercedes Scandiani
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Centro de Referencia de Micología, Universidad Nacional de Rosario, Rosario, Argentina
| | - Jonathan Scauflaire
- Centre de Recherche et de Formation Agronomie, Haute Ecole Louvain en Hainaut, Montignies-sur-Sambre, Belgium
| | - David G Schmale
- School of Plant and Environmental Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, U.S.A
| | | | - Adnan Šišić
- Department of Ecological Plant Protection, University of Kassel, Witzenhausen, Germany
| | - Jason A Smith
- School of Forest Resources and Conservation, University of Florida, Gainesville, FL 32611, U.S.A
| | - Christopher W Smyth
- Department of Biological Sciences, Binghamton University, State University of New York, Binghamton, NY 13902, U.S.A
| | - Hokyoung Son
- Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Ellie Spahr
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV 26506, U.S.A
| | - Jason E Stajich
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA 92521, U.S.A
| | - Emma Steenkamp
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | - Christian Steinberg
- Agroécologie, AgroSup Dijon, INRAE, University of Bourgogne Franche-Comté, Dijon, France
| | - Rajagopal Subramaniam
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario K1A 0C6, Canada
| | - Haruhisa Suga
- Life Science Research Center, Gifu University, Gifu, Japan
| | - Brett A Summerell
- Australian Institute of Botanical Science, Royal Botanic Garden and Domain Trust, Sydney, Australia
| | - Antonella Susca
- Institute of Sciences of Food Production, Research National Council, Bari, Italy
| | - Cassandra L Swett
- Department of Plant Pathology, University of California, Davis, CA 95616, U.S.A
| | | | - Terry J Torres-Cruz
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Anna M Tortorano
- Department of Biomedical Sciences for Health, University of Milano, Milan, Italy
| | - Martin Urban
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Lisa J Vaillancourt
- Department of Plant Pathology, University of Kentucky, Lexington, KY 40546, U.S.A
| | - Gary E Vallad
- Gulf Coast Research and Education Center, University of Florida, Wimauma, FL 33598, U.S.A
| | - Theo A J van der Lee
- Wageningen Plant Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Dan Vanderpool
- Department of Biology, Indiana University, Bloomington, IN 47405, U.S.A
| | - Anne D van Diepeningen
- Wageningen Plant Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Martha M Vaughan
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - Eduard Venter
- Department of Botany and Plant Biotechnology, University of Johannesburg, Auckland Park, South Africa
| | - Marcele Vermeulen
- Department of Microbial Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
| | - Paul E Verweij
- Department of Medical Mycology and Infectious Diseases, Center of Expertise in Mycology, Radboud University Medical Center, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Matieland, South Africa
| | - Cees Waalwijk
- Wageningen Plant Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Emma C Wallace
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Grit Walther
- German National Reference Center for Invasive Fungal Infections NRZMyk, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, Jena, Germany
| | - Jie Wang
- DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94702
| | - Todd J Ward
- Mycotoxin Prevention and Applied Microbiology Research Unit, USDA-ARS, Peoria, IL 61604, U.S.A
| | - Brian L Wickes
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center, San Antonio, TX 78229, U.S.A
| | - Nathan P Wiederhold
- Department of Pathology, University of Texas Health Science Center, San Antonio, TX 78229, U.S.A
| | - Michael J Wingfield
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
| | - Ana K M Wood
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Jin-Rong Xu
- Department of Pathology, University of Texas Health Science Center, San Antonio, TX 78229, U.S.A
| | - Xiao-Bing Yang
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich, United Kingdom
| | | | - Sung-Hwan Yun
- Department of Medical Biotechnology, Soonchunhyang University, Asan, Republic of Korea
| | - Latiffah Zakaria
- School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Hao Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agriculture Sciences, Beijing, People's Republic of China
| | - Ning Zhang
- Department of Plant Biology, Rutgers University, New Brunswick, NJ 08901, U.S.A
| | - Sean X Zhang
- Department of Pathology, Johns Hopkins University, Baltimore, MD 21287, U.S.A
| | - Xue Zhang
- College of Plant Protection, Northwest Agriculture and Forestry University, Xianyang, People's Republic of China
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16
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Zhang X, Huang H, Wu B, Xie J, Viljoen A, Wang W, Mostert D, Xie Y, Fu G, Xiang D, Lyu S, Liu S, Li C. The M35 Metalloprotease Effector FocM35_1 Is Required for Full Virulence of Fusarium oxysporum f. sp. cubense Tropical Race 4. Pathogens 2021; 10:670. [PMID: 34072465 PMCID: PMC8226822 DOI: 10.3390/pathogens10060670] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 11/16/2022] Open
Abstract
Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) causes Fusarium wilt of banana, the most devastating disease on a banana plant. The genome of Foc TR4 encodes many candidate effector proteins. However, little is known about the functions of these effector proteins on their contributions to disease development and Foc TR4 virulence. Here, we discovered a secreted metalloprotease, FocM35_1, which is an essential virulence effector of Foc TR4. FocM35_1 was highly upregulated during the early stages of Foc TR4 infection progress in bananas. The FocM35_1 knockout mutant compromised the virulence of Foc TR4. FocM35_1 could interact with the banana chitinase MaChiA, and it decreased banana chitinase activity. FocM35_1 induced cell death in Nicotiana benthamiana while suppressing the INF1-induced hypersensitive response (HR), and its predicted enzymatic site was required for lesion formation and the suppression to INF1-induced HR on N. benthamiana leaves. Importantly, treatment of banana leaves with recombinant FocM35_1 accelerates Foc TR4 infection. Collectively, our study provides evidence that metalloprotease effector FocM35 seems to contribute to pathogen virulence by inhibiting the host immunity.
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Affiliation(s)
- Xiaoxia Zhang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China;
| | - Huoqing Huang
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; (H.H.); (B.W.); (Y.X.); (D.X.); (C.L.)
| | - Bangting Wu
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; (H.H.); (B.W.); (Y.X.); (D.X.); (C.L.)
| | - Jianghui Xie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (J.X.); (W.W.)
| | - Altus Viljoen
- Department of Plant Pathology, University of Stellenbosch, Matieland 7602, South Africa; (A.V.); (D.M.)
| | - Wei Wang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (J.X.); (W.W.)
| | - Diane Mostert
- Department of Plant Pathology, University of Stellenbosch, Matieland 7602, South Africa; (A.V.); (D.M.)
| | - Yanling Xie
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; (H.H.); (B.W.); (Y.X.); (D.X.); (C.L.)
| | - Gang Fu
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning 530007, China;
| | - Dandan Xiang
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; (H.H.); (B.W.); (Y.X.); (D.X.); (C.L.)
| | - Shuxia Lyu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China;
| | - Siwen Liu
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; (H.H.); (B.W.); (Y.X.); (D.X.); (C.L.)
| | - Chunyu Li
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; (H.H.); (B.W.); (Y.X.); (D.X.); (C.L.)
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17
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Kimunye JN, Muzhinji N, Mostert D, Viljoen A, Bester-van der Merwe AE, Mahuku G. Genetic Diversity and Mating Type Distribution of Pseudocercospora fijiensis on Banana in Uganda and Tanzania. Phytopathology 2021; 111:741-750. [PMID: 32931393 DOI: 10.1094/phyto-04-20-0138-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Black Sigatoka, caused by Pseudocercospora fijiensis, is a major foliar disease of banana and plantain worldwide. There are few available data regarding the genetic diversity and population structure of the pathogen in East Africa, which are needed to design effective and durable disease management strategies. We genotyped 319 single-spore isolates of P. fijiensis collected from seven regions in Uganda and Tanzania and five isolates from Nigeria using 16 simple sequence repeat markers and mating type-specific primers. Isolates from each country and region within the country were treated as populations and subpopulations, respectively. A total of 296 multilocus genotypes (MLGs) were recovered, representing a clonal fraction of 7%. Subpopulations had a moderate level of genetic diversity (Hexp = 0.12 to 0.31; mean, 0.29). Mating type distribution did not deviate from equilibrium (MAT1-1: MAT1-2, 1:1 ratio) in Uganda; however, in Tanzania the mating types were not in equilibrium (4:1 ratio). The index of association tests (IA and r̄d) showed that all populations were at linkage equilibrium (P > 0.05), thus supporting the hypothesis of random association of alleles. These findings are consistent with a pathogen that reproduces both clonally and sexually. Low and insignificant levels of population differentiation were detected, with 90% of the variation occurring among isolates within subpopulations. The high intrapopulation variation has implications in breeding for resistance to P. fijiensis because isolates differing in aggressiveness and virulence are likely to exist over small spatial scales. Diverse isolates will be required for resistance screening to ensure selection of banana cultivars with durable resistance to Sigatoka in East Africa.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
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Affiliation(s)
- Janet N Kimunye
- International Institute of Tropical Agriculture, P.O. Box 7878, Kampala, Uganda
- Department of Plant Pathology, Private Bag X1, Stellenbosch University, Matieland 7602, South Africa
| | - Norman Muzhinji
- Department of Applied and Natural Sciences, Namibia University of Science and Technology, Private Bag 13388, Windhoek, Namibia
| | - Diane Mostert
- Department of Plant Pathology, Private Bag X1, Stellenbosch University, Matieland 7602, South Africa
| | - Altus Viljoen
- Department of Plant Pathology, Private Bag X1, Stellenbosch University, Matieland 7602, South Africa
| | | | - George Mahuku
- International Institute of Tropical Agriculture, P.O. Box 7878, Kampala, Uganda
- International Institute of Tropical Agriculture, P.O. Box, 34441, Dar es Salaam, Tanzania
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18
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Liu S, Li J, Zhang Y, Liu N, Viljoen A, Mostert D, Zuo C, Hu C, Bi F, Gao H, Sheng O, Deng G, Yang Q, Dong T, Dou T, Yi G, Ma L, Li C. Erratum. New Phytol 2020; 228:2004. [PMID: 33459356 PMCID: PMC8097616 DOI: 10.1111/nph.16718] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 05/28/2020] [Indexed: 06/12/2023]
Affiliation(s)
- Siwen Liu
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
- College of HorticultureShenyang Agricultural UniversityShenyang110866Liaoning ProvinceChina
| | - Jian Li
- School of Life SciencesSun Yat‐sen UniversityGuangzhou510275China
| | - Yong Zhang
- Department of Biochemistry and Molecular BiologyUniversity of MassachusettsAmherstMA01003USA
| | - Na Liu
- Institute of BiotechnologyZhejiang UniversityHangzhou310058China
| | - Altus Viljoen
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Diane Mostert
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Cunwu Zuo
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Chunhua Hu
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Fangcheng Bi
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Huijun Gao
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Ou Sheng
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Guiming Deng
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Qiaosong Yang
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Tao Dong
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Tongxin Dou
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Ganjun Yi
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Li‐Jun Ma
- Department of Biochemistry and Molecular BiologyUniversity of MassachusettsAmherstMA01003USA
| | - Chunyu Li
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitute of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
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19
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Viljoen A, Mostert D, Chiconela T, Beukes I, Fraser C, Dwyer J, Murray H, Amisse J, Matabuana EL, Tazan G, Amugoli OM, Mondjana A, Vaz A, Pretorius A, Bothma S, Rose LJ, Beed F, Dusunceli F, Chao CP, Molina A. Occurrence and spread of the banana fungus Fusarium oxysporum f. sp. cubense TR4 in Mozambique. S AFR J SCI 2020. [DOI: 10.17159/sajs.2020/8608] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Fusarium wilt, caused by the soil-borne fungus Fusarium oxysporum f. sp. cubense (Foc), poses a major threat to banana production globally. A variant of Foc that originated in Southeast Asia, called tropical race 4 (TR4), was detected on a Cavendish banana export plantation (Metocheria) in northern Mozambique in 2013. Foc TR4 was rapidly disseminated on the farm, and affected approximately half a million plants within 3 years. The fungus was also detected on a second commercial property approximately 200 km away (Lurio farm) a year later, and on a small-grower’s property near Metocheria farm in 2015. Surveys in Mozambique showed that non-Cavendish banana varieties were only affected by Foc race 1 and race 2 strains. The testing of Cavendish banana somaclones in northern Mozambique revealed that GCTCV-119 was most resistant to Foc TR4, but that GCTCV-218 produced better bunches. The occurrence of Foc TR4 in northern Mozambique poses a potential threat to food security on the African continent, where banana is considered a staple food and source of income to millions of people. Cavendish somaclones can be used, in combination with integrated disease management practices, to replace susceptible Cavendish cultivars in southern Africa. The comprehensive testing of African cooking bananas for resistance to Foc TR4 is required, along with the improvement of biosecurity and preparedness of growers on the African continent.
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Affiliation(s)
- Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Diane Mostert
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Tomas Chiconela
- Faculty of Agronomy, Eduardo Mondlane University, Maputo, Mozambique
| | - Ilze Beukes
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Connie Fraser
- Matanuska, Nampula, Mozambique
- Banana Growers Association of South Africa, Mbombela, South Africa
| | | | | | - Jamisse Amisse
- Mozambique Agriculture Research Institute, Nampula, Mozambique
| | | | - Gladys Tazan
- Jacaranda Agricultura, Namialo, Nampula, Mozambique
| | - Otuba M. Amugoli
- Faculty of Agronomy, Eduardo Mondlane University, Maputo, Mozambique
| | - Ana Mondjana
- Faculty of Agronomy, Eduardo Mondlane University, Maputo, Mozambique
| | - Antonia Vaz
- Department of Plant Health, Maputo, Mozambique
| | - Anria Pretorius
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Sheryl Bothma
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Lindy J. Rose
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Fenton Beed
- International Institute for Tropical Agriculture, Dar-es-Salaam, Tanzania
- Plant Production and Protection Department, Food and Agriculture Organization of the United Nations, Rome, Italy
| | - Fazil Dusunceli
- Food and Agriculture Organization of the United Nations Sub-regional Office for Central Asia, Ankara, Turkey
| | | | - Agustin Molina
- International Consultant Banana R&D, Los Banos, Laguna, Philippines
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Hendriks SL, Viljoen A, Marais D, Wenhold FAM, McIntyre AM, Ngidi MS, Annandale JG, Kalaba M, Stewart D. Considerations for the design of nutrition-sensitive production programmes in rural South Africa. BMC Public Health 2020; 20:1383. [PMID: 32912223 PMCID: PMC7488396 DOI: 10.1186/s12889-020-09445-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 08/25/2020] [Indexed: 12/02/2022] Open
Abstract
Background Very little has been researched about the efficacy, effectiveness, feasibility, sustainability and impact of food-based approaches on the diets and nutritional status of populations at risk of hunger and food insecurity. This study contributes knowledge about the impact of food-based approaches on the diets of populations at risk of hunger and food insecurity in four of the poorest rural communities in South Africa. The study investigated the consumption and production patterns of rural households (278 in summer and 280 in winter) in four sites in the poorest municipalities in South Africa. Methods A multistage stratified random sampling technique was applied to identify the communities and sample households for the quantitative survey and qualitative assessments. Qualitative and quantitative data were collected between 2013 and 2015 through focus group discussions (FGDs), key informant interviews and the two-round panel survey to cover both the summer and winter seasons at each site. Results Home gardening led to a significant positive increase in the consumption of white roots and tubers, dark green leafy vegetables, orange-coloured fruit and other fruit in the 24 h prior to the survey. Participation in a community garden led to significant increases in the consumption of dark green leafy vegetables and other vegetables. School gardening did not demonstrate any statistical relationships with the consumption of foods from the crop-related food groups. Crop production improved dietary diversity. Selling produce and irrigation showed a stronger improvement in dietary diversity. Seasonality affected the availability of fresh fruit and vegetables for home consumption in winter. Conclusions Producing beyond that solely for home consumption has greater benefits for dietary diversity and a consumption-smoothing effect during the post-harvest period. Politicians and the scientific community should recognise the role that household and small-scale crop production plays in supporting household consumption and the provision of essential micronutrients despite constraints and disincentives. Production and education programmes should focus on strengthening existing good consumption patterns and promoting the consumption of foods that can improve dietary diversity.
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Affiliation(s)
- S L Hendriks
- Department of Agricultural Economics, Extension and Rural Development, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa.
| | - A Viljoen
- Department of Consumer Science, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - D Marais
- Department of Plant and Soil Sciences, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - F A M Wenhold
- Department of Human Nutrition, University of Pretoria, X323, Arcadia, Pretoria, 0007, South Africa
| | - A M McIntyre
- Department of Agricultural Economics, Extension and Rural Development, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - M S Ngidi
- Department of Agricultural Extension and Rural Resource Management, School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-Natal, Pietermaritzburg, PBag01, Scottsville, 3209, South Africa
| | - J G Annandale
- Department of Plant and Soil Sciences, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - M Kalaba
- Department of Agricultural Economics, Extension and Rural Development, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - D Stewart
- Lima Rural Development Foundation, 2 Forrester's Lane, Pietermaritzburg, 3201, South Africa
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Ndayihanzamaso P, Mostert D, Matthews MC, Mahuku G, Jomanga K, Mpanda HJ, Mduma H, Brown A, Uwimana B, Swennen R, Tumuhimbise R, Viljoen A. Evaluation of Mchare and Matooke Bananas for Resistance to Fusarium oxysporum f. sp. cubense Race 1. Plants (Basel) 2020; 9:plants9091082. [PMID: 32842551 PMCID: PMC7570241 DOI: 10.3390/plants9091082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 01/16/2023]
Abstract
Fusarium wilt, caused by the soil-borne fungus Fusarium oxysporum f. sp. cubense (Foc) race 1, is a major disease of bananas in East Africa. Triploid East African Highland (Matooke) bananas are resistant to Foc race 1, but the response of diploid (Mchare and Muraru) bananas to the fungus is largely unknown. A breeding project was initiated in 2014 to increase crop yield and improve disease and pest resistance of diploid and triploid East African Highland bananas. In this study, eight Mchare cultivars were evaluated for resistance to Foc race 1 in the field in Arusha, Tanzania. In addition, the same eight Mchare cultivars, as well as eight Muraru cultivars, 27 Mchare hybrids, 60 Matooke hybrids and 19 NARITA hybrids were also screened in pot trials. The diploid Mchare and Muraru cultivars were susceptible to Foc race 1, whereas the responses of Mchare, NARITAs and Matooke hybrids ranged from susceptible to resistant. The Mchare and Matooke hybrids resistant to Foc race 1 can potentially replace susceptible cultivars in production areas severely affected by the fungus. Some newly bred Matooke hybrids became susceptible following conventional breeding, suggesting that new hybrids need to be screened for resistance to all Foc variants.
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Affiliation(s)
- Privat Ndayihanzamaso
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa; (P.N.); (M.C.M.); (A.V.)
| | - Diane Mostert
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa; (P.N.); (M.C.M.); (A.V.)
- Correspondence:
| | - Megan Ceris Matthews
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa; (P.N.); (M.C.M.); (A.V.)
| | - George Mahuku
- International Institute of Tropical Agriculture (IITA) Regional Hub, Plot 25, Light Industrial Area, Coca Cola Rd, P.O. Box 34441, Dar es Salaam, Tanzania;
| | - Kennedy Jomanga
- International Institute of Tropical Agriculture (IITA), c/o The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O. Box 447, Arusha, Tanzania; (K.J.); (H.J.M.); (H.M.); (A.B.); (R.S.)
| | - Happyness Justine Mpanda
- International Institute of Tropical Agriculture (IITA), c/o The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O. Box 447, Arusha, Tanzania; (K.J.); (H.J.M.); (H.M.); (A.B.); (R.S.)
| | - Hassan Mduma
- International Institute of Tropical Agriculture (IITA), c/o The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O. Box 447, Arusha, Tanzania; (K.J.); (H.J.M.); (H.M.); (A.B.); (R.S.)
| | - Allan Brown
- International Institute of Tropical Agriculture (IITA), c/o The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O. Box 447, Arusha, Tanzania; (K.J.); (H.J.M.); (H.M.); (A.B.); (R.S.)
| | - Brigitte Uwimana
- International Institute of Tropical Agriculture (IITA), Namulonge, P.O. Box 7878, Kampala, Uganda;
| | - Rony Swennen
- International Institute of Tropical Agriculture (IITA), c/o The Nelson Mandela African Institution of Science and Technology (NM-AIST), P.O. Box 447, Arusha, Tanzania; (K.J.); (H.J.M.); (H.M.); (A.B.); (R.S.)
- Laboratory of Tropical Crop Improvement, Katholieke, Universiteit Leuven (KUL), Willem De Croylaan 42, Bus 2455, 3001 Leuven, Belgium
- Bioversity International, Willem De Croylaan 42, 3001 Leuven, Belgium
| | - Robooni Tumuhimbise
- National Agricultural Research Organization (NARO), Rwebitaba ZARDI, P.O. Box 96, Fort Portal, Uganda;
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa; (P.N.); (M.C.M.); (A.V.)
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22
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Aguayo J, Cerf I, Folscher AB, Fourrier-Jeandel C, Ioos R, Matthews MC, Mostert D, Renault C, Wilson V, Viljoen A. First report of Fusarium oxysporum f. sp. cubense tropical race 4 (TR4) causing banana wilt in the Island of Mayotte. Plant Dis 2020; 105:219. [PMID: 32755365 DOI: 10.1094/pdis-06-20-1196-pdn] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Fusarium oxysporum f. sp. cubense (Foc) is a fungus causing Fusarium wilt of banana (Musa spp.). The fungus is divided into three races and 24 vegetative compatibility groups (VCG) of which VCG 01213/16, commonly known as Foc tropical race 4 (Foc TR4), is of particular concern. Foc TR4 severely affects Cavendish (AAA) bananas, which comprise about 50% of all bananas produced globally, as well as many varieties susceptible to the other races of Foc. The pathogen was restricted to Southeast Asia and Australia until 2012, where after it has been detected in the Middle East, Mozambique in Africa, and Colombia in South America (Viljoen et al. 2020). Here we report the first detection of Foc TR4 in the French department of Mayotte, located in the Indian Ocean. In September 2019, leaf yellowing and wilting symptoms were observed in individual plants of the banana subgroups Silk (AAB) (cv. "Kissoukari") and Bluggoe (ABB) (cv. "Baraboufaka"). The symptomatic individuals were found in private gardens in the village of Poroani in Southwest Mayotte (World Geodetic System [WGS] 12° 53' 31.83''S, 45° 8' 30.98" E). When the pseudostems of symptomatic plants were split open, dark red to brown vascular discoloration was observed. Pseudostem tissue samples were collected and identified as Foc TR4 with the real-time PCR assay developed by Aguayo et al. (2017). Sections of the pseudostem samples were surface sterilized and used to isolate the fungus on potato dextrose agar (PDA) medium. Isolates were identified as F. oxysporum based on cultural and morphological characteristics as described in Leslie and Summerell (2006), which included fluffy aerial mycelia on PDA and the presence of short monophialides conidigenous cells bearing microconidia arranged in false heads. Abundant chlamydospores were also produced on synthetic nutrient poor agar (SNA) media. Single-spored isolates were used to develop nit mutants for vegetative compatibility group (VCG) testing (Correll 1991; Puhalla 1985). The isolates were confirmed as VCG 01213/16 as formation of heterokaryons was obtained with the nit mutants of the universal Foc TR4 tester. Two VCG 01213/16 isolates were then selected for pathogenicity testing by inoculating 2-month-old tissue culture-derived Cavendish plants, using the method described by Viljoen et al. (2017). After 10 weeks, the Foc TR4-inoculated plants produced wilting symptoms and internal rhizome discoloration typical of Fusarium wilt. Fusarium oxysporum was re-isolated from the inoculated plants and identified as Foc TR4/VCG 01213/16 by PCR (Dita et al. 2010; Matthews et al. 2020), thereby fulfilling Koch's postulates. Local authorities have destroyed the infected plants, and have undertaken an extensive survey to determine the distribution of Foc TR4 on the island. Three additional positive cases, identified with the real-time PCR assay of Aguayo et al. (2017), were found in the localities of Koungou ([WGS] 12° 44' 03''S, 45° 12' 08" E) and Bouéni ([WGS] 12° 54' 25''S, 45° 04' 43" E). These included infected Cavendish banana (AAA) plants (cv. "Kontriké"). This is the first time that Foc TR4 has been found on a banana variety other than Cavendish when newly detected in a country. Considering the proximity of Mayotte to other islands of the Comoros archipelago, Madagascar and the East African coast, where banana is considered an important staple, this report describes a serious threat to banana production and the livelihoods of people in the region.
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Affiliation(s)
- Jaime Aguayo
- ANSES Laboratoire de la Santé des Végétaux, Unité de mycologie, Domaine de Pixérécourt, Bat. E, Malzéville, France, 54220;
| | - Isabelle Cerf
- ANSES, Laboratoire de la Santé des Végétaux, Unité de mycologie Domaine de Pixérécourt, Bat. E, Malzéville, France;
| | - Alexander Bart Folscher
- Stellenbosch University, 26697, Department of Plant Pathology, Stellenbosch, Western Cape, South Africa;
| | - Céline Fourrier-Jeandel
- ANSES, Laboratoire de la Santé des Végétaux, Unité de mycologie. Domaine de Pixérécourt. Bat. E, Malzéville, France;
| | - Renaud Ioos
- ANSES, Laboratoire de la Santé des Végétaux, Unité de mycologie. Domaine de Pixérécourt. Bat. E, Malzéville, France;
| | - Megan C Matthews
- Stellenbosch University Faculty of AgriSciences, 151679, Department of Plant Pathology, Stellenbosch, Western Cape, South Africa;
| | - Diane Mostert
- Stellenbosch University Faculty of AgriSciences, 151679, Department of Plant Pathology, Stellenbosch, Western Cape, South Africa
- Stellenbosch University;
| | - Camille Renault
- ANSES, Laboratoire de la Santé des Végétaux, Unité de mycologie. Domaine de Pixérécourt. Bat. E, Malzéville, France;
| | - Veronique Wilson
- ANSES, Laboratoire de la Santé des Végétaux, Unité de mycologie. Domaine de Pixérécourt. Bat. E, Malzéville, France;
| | - Altus Viljoen
- University of Stellenbosch, Plant Pathology, Private Bag X1, Matieland, Stellenbosch, Western Cape, South Africa, 7600;
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23
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Links S, van Zyl K, Cassiem A, Flett B, Viljoen A, Rose L. The association of maize characteristics with resistance to Fusarium verticillioides and fumonisin accumulation in commercial maize cultivars. WORLD MYCOTOXIN J 2020. [DOI: 10.3920/wmj2019.2537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Fusarium verticillioides is the primary fungus that causes Fusarium ear rot (FER) of maize. Infection results in reduced grain yield and quality due to moulding and the contamination of grain with toxic compounds namely fumonisins. Resistance to fungal infection and fumonisin accumulation in maize and maize grain is governed at different levels. In this study, the structural, physico-chemical and genetic basis of resistance to F. verticillioides was investigated in two, replicated field trials at Potchefstroom and Vaalharts in South Africa. Phenotypic data (silk length, husk coverage, pericarp thickness hundred-kernel mass and kernel hardness), physico-chemical data (kernel pH, moisture content, total nitrogen and carbon as well as phenolic acid content) and the expression of pathogenesis-related-5 gene (PR5) and peroxidase gene expression was evaluated in 15 commercial cultivars under artificially inoculated and natural infection conditions. The data were correlated to FER severity, fumonisin accumulation and fungal DNA (referred to as infection indicators). Disease development and fumonisin contamination in Vaalharts was significantly more than in Potchefstroom. There were no significant correlations (r=≥0.60) between phenotypic characteristics and infection indicators. Kernel pH was the most important trait associated with disease development and was negatively correlated (between r=-0.58 and r=-0.75) to all infection indicators. PR5 gene expression had significant positive correlations (r=0.69 and r=0.72) with the fungal and fumonisin levels, respectively. This study presents of the first data demonstrating the use of gene expression in identifying FER/fumonisin-resistant plant material and could aid breeders and growers in selecting resistant material more effectively.
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Affiliation(s)
- S. Links
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
- Grain SA, Research and Policy Centre, 457 Witherite Street, Willow Acres, Pretoria, 7600, South Africa
| | - K. van Zyl
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
| | - A. Cassiem
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
| | - B.C. Flett
- Agricultural Research Council, Grain Crops, Potchefstroom, 2520, South Africa
| | - A. Viljoen
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
| | - L.J. Rose
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
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24
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Barral B, Chillet M, Doizy A, Grassi M, Ragot L, Léchaudel M, Durand N, Rose LJ, Viljoen A, Schorr-Galindo S. Diversity and Toxigenicity of Fungi that Cause Pineapple Fruitlet Core Rot. Toxins (Basel) 2020; 12:toxins12050339. [PMID: 32455651 PMCID: PMC7291148 DOI: 10.3390/toxins12050339] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/12/2020] [Accepted: 05/14/2020] [Indexed: 11/16/2022] Open
Abstract
The identity of the fungi responsible for fruitlet core rot (FCR) disease in pineapple has been the subject of investigation for some time. This study describes the diversity and toxigenic potential of fungal species causing FCR in La Reunion, an island in the Indian Ocean. One-hundred-and-fifty fungal isolates were obtained from infected and healthy fruitlets on Reunion Island and exclusively correspond to two genera of fungi: Fusarium and Talaromyces. The genus Fusarium made up 79% of the isolates, including 108 F. ananatum, 10 F. oxysporum, and one F. proliferatum. The genus Talaromyces accounted for 21% of the isolated fungi, which were all Talaromyces stollii. As the isolated fungal strains are potentially mycotoxigenic, identification and quantification of mycotoxins were carried out on naturally or artificially infected diseased fruits and under in vitro cultures of potential toxigenic isolates. Fumonisins B1 and B2 (FB1-FB2) and beauvericin (BEA) were found in infected fruitlets of pineapple and in the culture media of Fusarium species. Regarding the induction of mycotoxin in vitro, F.proliferatum produced 182 mg kg⁻1 of FB1 and F. oxysporum produced 192 mg kg⁻1 of BEA. These results provide a better understanding of the causal agents of FCR and their potential risk to pineapple consumers.
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Affiliation(s)
- Bastien Barral
- Qualisud, Université de Montpellier, CIRAD, Montpellier SupAgro, Univ d’Avignon, Univ de La Reunion, F-34398 Montpellier, France; (M.C.); (M.G.); (L.R.); (M.L.); (N.D.); (S.S.-G.)
- CIRAD, UMR Qualisud, F-97410 Saint-Pierre, Reunion, France
- Correspondence: ; Tel.: +262-2-62-49-27-88
| | - Marc Chillet
- Qualisud, Université de Montpellier, CIRAD, Montpellier SupAgro, Univ d’Avignon, Univ de La Reunion, F-34398 Montpellier, France; (M.C.); (M.G.); (L.R.); (M.L.); (N.D.); (S.S.-G.)
- CIRAD, UMR Qualisud, F-97410 Saint-Pierre, Reunion, France
| | - Anna Doizy
- CIRAD, UMR PVBMT, F-97410 Saint-Pierre, Reunion, France;
| | - Maeva Grassi
- Qualisud, Université de Montpellier, CIRAD, Montpellier SupAgro, Univ d’Avignon, Univ de La Reunion, F-34398 Montpellier, France; (M.C.); (M.G.); (L.R.); (M.L.); (N.D.); (S.S.-G.)
| | - Laetitia Ragot
- Qualisud, Université de Montpellier, CIRAD, Montpellier SupAgro, Univ d’Avignon, Univ de La Reunion, F-34398 Montpellier, France; (M.C.); (M.G.); (L.R.); (M.L.); (N.D.); (S.S.-G.)
| | - Mathieu Léchaudel
- Qualisud, Université de Montpellier, CIRAD, Montpellier SupAgro, Univ d’Avignon, Univ de La Reunion, F-34398 Montpellier, France; (M.C.); (M.G.); (L.R.); (M.L.); (N.D.); (S.S.-G.)
- CIRAD, UMR Qualisud, F-97130 Capesterre-Belle-Eau, Guadeloupe, France
| | - Noel Durand
- Qualisud, Université de Montpellier, CIRAD, Montpellier SupAgro, Univ d’Avignon, Univ de La Reunion, F-34398 Montpellier, France; (M.C.); (M.G.); (L.R.); (M.L.); (N.D.); (S.S.-G.)
- CIRAD, UMR Qualisud, F-34398 Montpellier, France
| | - Lindy Joy Rose
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7600, South Africa; (L.J.R.); (A.V.)
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7600, South Africa; (L.J.R.); (A.V.)
| | - Sabine Schorr-Galindo
- Qualisud, Université de Montpellier, CIRAD, Montpellier SupAgro, Univ d’Avignon, Univ de La Reunion, F-34398 Montpellier, France; (M.C.); (M.G.); (L.R.); (M.L.); (N.D.); (S.S.-G.)
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Liu S, Li J, Zhang Y, Liu N, Viljoen A, Mostert D, Zuo C, Hu C, Bi F, Gao H, Sheng O, Deng G, Yang Q, Dong T, Dou T, Yi G, Ma L, Li C. Fusaric acid instigates the invasion of banana by Fusarium oxysporum f. sp. cubense TR4. New Phytol 2020; 225:913-929. [PMID: 31513293 PMCID: PMC6973005 DOI: 10.1111/nph.16193] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 09/05/2019] [Indexed: 05/04/2023]
Abstract
Fusaric acid (FSA) is a phytotoxin produced by several Fusarium species and has been associated with plant disease development, although its role is still not well understood. Mutation of key genes in the FSA biosynthetic gene (FUB) cluster in Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) reduced the FSA production, and resulted in decreased disease symptoms and reduced fungal biomass in the host banana plants. When pretreated with FSA, both banana leaves and pseudostems exhibited increased sensitivity to Foc TR4 invasion. Banana embryogenic cell suspensions (ECSs) treated with FSA exhibited a lower rate of O2 uptake, loss of mitochondrial membrane potential, increased reactive oxygen species (ROS) accumulation, and greater nuclear condensation and cell death. Consistently, transcriptomic analysis of FSA-treated ECSs showed that FSA may induce plant cell death through regulating the expression of genes involved in mitochondrial functions. The results herein demonstrated that the FSA from Foc TR4 functions as a positive virulence factor and acts at the early stage of the disease development before the appearance of the fungal hyphae in the infected tissues.
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Affiliation(s)
- Siwen Liu
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource UtilizationMinistry of AgricultureKey laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong ProvinceInstitution of Fruit Tree ResearchGuangdong Academy of Agricultural SciencesGuangzhou510640Guangdong ProvinceChina
| | - Jian Li
- College of HorticultureShenyang Agricultural UniversityShenyang110866Liaoning ProvinceChina
| | - Yong Zhang
- Institute of BiotechnologyZhejiang UniversityHangzhou310058China
| | - Na Liu
- School of Life SciencesSun Yat‐sen UniversityGuangzhou510275China
| | - Altus Viljoen
- Department of Biochemistry and Molecular BiologyUniversity of MassachusettsAmherstMA01003USA
| | - Diane Mostert
- Department of Biochemistry and Molecular BiologyUniversity of MassachusettsAmherstMA01003USA
| | - Cunwu Zuo
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Chunhua Hu
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Fangcheng Bi
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Huijun Gao
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Ou Sheng
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Guiming Deng
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Qiaosong Yang
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Tao Dong
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Tongxin Dou
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Ganjun Yi
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
| | - Li‐Jun Ma
- Institute of BiotechnologyZhejiang UniversityHangzhou310058China
| | - Chunyu Li
- Department of Plant PathologyUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
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Kimunye JN, Were E, Mussa F, Tazuba A, Jomanga K, Viljoen A, Swennen R, Muthoni FK, Mahuku G. Distribution of Pseudocercospora species causing Sigatoka leaf diseases of banana in Uganda and Tanzania. Plant Pathol 2020; 69:50-59. [PMID: 31894162 PMCID: PMC6919302 DOI: 10.1111/ppa.13105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/25/2019] [Accepted: 09/29/2019] [Indexed: 05/31/2023]
Abstract
Sigatoka leaf diseases are a major constraint to banana production. A survey was conducted in Tanzania and Uganda to assess the distribution of Pseudocercospora species and severity of Sigatoka leaf diseases. Pseudocercospora species were identified using species-specific primers. Sigatoka-like leaf diseases were observed in all farms and on all cultivars, but disease severity varied significantly (P < 0.001) between countries, districts/regions within countries, altitudinal ranges and banana cultivars. In all regions except Kilimanjaro, P. fijiensis, the causal agent of black Sigatoka, was the only pathogen associated with Sigatoka disease. Mycosphaerella musae was associated with Sigatoka-like symptoms in Kilimanjaro region. Black Sigatoka disease was more severe in Uganda, with a mean disease severity index (DSI) of 37.5%, than in Tanzania (DSI = 19.9%). In Uganda, black Sigatoka disease was equally severe in Luwero district (mean DSI = 40.4%) and Mbarara district (mean DSI = 37.9%). In Tanzania, black Sigatoka was most severe in Kagera region (mean DSI = 29.2%) and least in Mbeya region (mean DSI = 11.5%). Pseudocercospora fijiensis, the most devastating sigatoka pathogen, was detected at altitudes of up to 1877 m a.s.l. This range expansion of P. fijiensis, previously confined to altitudes lower than 1350 m a.s.l. in East Africa, is of concern, especially for smallholder banana farmers growing the susceptible East African Highland bananas (EAHB). Among the banana varieties sampled, the EAHB, FHIA hybrids and Mchare were the most susceptible. Here, the loss of resistance in Yangambi KM5, a banana variety previously resistant to P. fijiensis, is reported for the first time.
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Affiliation(s)
- J. N. Kimunye
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - E. Were
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
| | - F. Mussa
- International Institute of Tropical Agriculture (IITA), Dar es Salaam, PO Box 34441, Tanzania
| | - A. Tazuba
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
| | - K. Jomanga
- International Institute of Tropical Agriculture (IITA), c/o Nelson Mandela African Institution of Science and Technology, Nelson Mandela Road, Arusha, Tanzania
| | - A. Viljoen
- International Institute of Tropical Agriculture (IITA), Dar es Salaam, PO Box 34441, Tanzania
| | - R. Swennen
- International Institute of Tropical Agriculture (IITA), c/o Nelson Mandela African Institution of Science and Technology, Nelson Mandela Road, Arusha, Tanzania
- Laboratory of Tropical Crop Improvement, KU Leuven, Willem De Croylaan 42, 3001 Leuven, Belgium
| | | | - G. Mahuku
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
- International Institute of Tropical Agriculture (IITA), Dar es Salaam, PO Box 34441, Tanzania
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Kharsany K, Viljoen A, Leonard C, van Vuuren S. The new buzz: Investigating the antimicrobial interactions between bioactive compounds found in South African propolis. J Ethnopharmacol 2019; 238:111867. [PMID: 30978456 DOI: 10.1016/j.jep.2019.111867] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 04/04/2019] [Accepted: 04/04/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Propolis, a resinous substance produced by the Apis mellifera bee, contains a number of flavonoids sourced from plants found in the surrounding region. Whilst bees use this substance to seal off and protect the beehive, humans have used propolis therapeutically for centuries, making use of its antibacterial, antiseptic, antipyretic and wound healing properties, among others. South African propolis is rich in the flavonoids pinocembrin, galangin, and chrysin and very little previous research has been conducted on the antimicrobial effects of these compounds. AIM OF THE STUDY To obtain an understanding of the antimicrobial activity of the compounds pinocembrin, galangin, and chrysin, both independently and in combination. MATERIALS AND METHODS The compounds pinocembrin, galangin and chrysin were investigated for interactive antimicrobial activity by determining the minimum inhibitory concentrations (MIC), minimum bactericidal concentrations (MBC), anti-quorum sensing activity, biofilm studies, and toxicity studies (brine shrimp lethality assay). RESULTS Minimum inhibitory concentration results demonstrated that combinations of compounds showed better inhibitory activity than single compounds. When the flavonoids were tested in combination using the MIC assay, synergy was noted for 22% of the 1:1 ratio combinations and for 66% of the triple 1:1:1 ratio combinations. Similarly, MBC results showed bactericidal activity from selected combinations, while the compounds on their own demonstrated no cidal activity. Quorum sensing studies showed that compound combinations are more effective at inhibiting bacterial communication than the individual compounds. Biofilm assays showed that the highest percentage inhibition was observed for the triple combination against E. coli at 24 h. Finally, brine shrimp lethality studies revealed that combinations of the three compounds had reduced cytotoxicity when compared to the individual compounds. CONCLUSION The results obtained in this study demonstrate that the compounds found in South African propolis work synergistically to achieve an optimal antimicrobial effect, whilst simultaneously minimizing cytotoxicity.
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Affiliation(s)
- K Kharsany
- Department of Pharmacy and Pharmacology, Faculty of Health Science, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa; SAMRC Herbal Drugs Research Unit, Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - C Leonard
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa
| | - S van Vuuren
- Department of Pharmacy and Pharmacology, Faculty of Health Science, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa.
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Wierzbicki A, Viljoen A, Viljoen S, Martin S, Crook M, Reynolds T. Review of referral criteria to lipid clinics and outcomes of treatment in 4 UK centres. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gratwick Z, Donnellan C, Page PC, Viljoen A, Williams J, Lyle CH. Caecal intussusceptions and typhlocolitis in horses with severe Gastrodiscus aegyptiacusinfestation. EQUINE VET EDUC 2018. [DOI: 10.1111/eve.12726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Z. Gratwick
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
| | - C. Donnellan
- Blue Cross Veterinary Hospital; Cape Town South Africa
| | - P. C. Page
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
| | - J. Williams
- Department of Paraclinical Studies; University of Pretoria; Onderstepoort South Africa
| | - C. H. Lyle
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
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Karangwa P, Mostert D, Ndayihanzamaso P, Dubois T, Niere B, Zum Felde A, Schouten A, Blomme G, Beed F, Viljoen A. Genetic Diversity of Fusarium oxysporum f. sp. cubense in East and Central Africa. Plant Dis 2018; 102:552-560. [PMID: 30673475 DOI: 10.1094/pdis-02-17-0282-re] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Banana Fusarium wilt is a major production constraint globally and a significant threat to the livelihoods of millions of people in East and Central Africa (ECA). A proper understanding of the diversity and population dynamics of the causal agent, Fusarium oxysporum f. sp. cubense (Foc), could be useful for the development of sustainable disease management strategies for the pathogen. The current study investigated the diversity of Foc in ECA using vegetative compatibility group (VCG) analysis, PCR-RFLPs of the ribosomal DNA's intergenic spacer region, as well as phylogenetic analysis of the elongation factor-1α gene. Six VCGs (0124, 0125, 0128, 01212, 01220, and 01222), which all belong to one lineage (Foc lineage VI), were widely distributed throughout the region. VCGs 0128 and 01220 are reported for the first time in Burundi, the Democratic Republic of Congo (DRC), Rwanda, Tanzania, and Uganda, while VCG 01212 is reported in the DRC and Rwanda. Isolates that did not belong to any of the known VCGs were identified as Foc lineage VI members by phylogenetic analysis and may represent novel VCGs. CAV 2734, a banana pathogen collected in Rwanda, clustered with nonpathogenic F. oxysporum isolates in lineage VIII. Results from this study will contribute significantly toward the implementation of banana Fusarium wilt disease management practices in the region, such as the restricted movement of infected planting material and the selective planting of resistant banana varieties.
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Affiliation(s)
- Patrick Karangwa
- Department of Plant Pathology, University of Stellenbosch, Matieland 7602, South Africa, and Rwanda Agriculture and Animal Resources Development Board, Kigali, Rwanda
| | - Diane Mostert
- Department of Plant Pathology, University of Stellenbosch, Matieland 7602, South Africa
| | - Privat Ndayihanzamaso
- Department of Plant Pathology, University of Stellenbosch, Matieland 7602, South Africa
| | | | - Björn Niere
- Julius Kühn-Institut, 38104 Braunschweig, Germany
| | - Alexandra Zum Felde
- Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics, Faculty of Organic Agricultural Sciences, University of Kassel, 37213 Witzenhausen, Germany
| | - Alexander Schouten
- Molecular Phytomedicine, Institute of Crop Science and Resource Conservation, Faculty of Agricultural Sciences, University of Bonn, 53115 Bonn, Germany
| | - Guy Blomme
- Bioversity International Addis Office, c/o ILRI, Addis Ababa, Ethiopia
| | - Fenton Beed
- World Vegetable Center, Kasetsart University, Bangkok, Thailand
| | - Altus Viljoen
- Department of Plant Pathology, University of Stellenbosch, Matieland 7602, South Africa
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Leonard C, Chen W, van Vuuren S, Viljoen A. Exploring the phytochemical variation of the “Pepper-bark” tree (Warburgia salutaris) using HPTLC and UPLC-MS. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- C Leonard
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
| | - W Chen
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
| | - S van Vuuren
- Department of Pharmacy and Pharmacology, University of Witwatersrand, Johannesburg, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
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Mncwangi N, Waltenberger B, Baraldo G, Jansen-Dürr P, Viljoen A, Stuppner H. Sclerocarya birrea cortex ethanolic extract – Chemical characterisation and NOX4 inhibition (anti-ageing property). Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- N Mncwangi
- 1. Department of Pharmaceutical Sciences and SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - B Waltenberger
- 2. Institute of Pharmacy/Pharmacognosy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80 – 20, 6020, Innsbruck, Austria
| | - G Baraldo
- 3. Institute for Biomedical Aging Research and CMBI, University of Innsbruck, Rennweg 10, 6020, Innsbruck, Austria
| | - P Jansen-Dürr
- 3. Institute for Biomedical Aging Research and CMBI, University of Innsbruck, Rennweg 10, 6020, Innsbruck, Austria
| | - A Viljoen
- 1. Department of Pharmaceutical Sciences and SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - H Stuppner
- 2. Institute of Pharmacy/Pharmacognosy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80 – 20, 6020, Innsbruck, Austria
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Komane B, Viljoen A, Vermaak I, Kamatou G, Summers B. Cosmetic application of Marula seed oil (Sclerocarya birrea): Clinical outcomes. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- B Komane
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - I Vermaak
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - G Kamatou
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - B Summers
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
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34
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Sandasi M, Chen W, Viljoen A. Identification and quantification of herbal tea blend raw materials using hyperspectral imaging spectroscopy. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M Sandasi
- Department of Pharmaceutical Sciences Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - W Chen
- Department of Pharmaceutical Sciences Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
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Vermaak I, Tankeu S, Djokam M, Sandasi M, Chen W, Viljoen A. Hyperspectral imaging in combination with chemometric data analysis – a novel approach in the quality control of herbal material. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- I Vermaak
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Pretoria, South Africa
| | - S Tankeu
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - M Djokam
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - M Sandasi
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - W Chen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Pretoria, South Africa
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36
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Aboobaker Z, van Vuuren S, Viljoen A, Crous P. South African endophytes- potential antimicrobial agents. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Z Aboobaker
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, 2193, Parktown, South Africa
| | - S van Vuuren
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, 2193, Parktown, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Faculty of Sciences, Tshwane University of Technology, Private Bag X680, 0001, Pretoria, South Africa
| | - P Crous
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508 AD, Utrecht, Netherlands
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Mostert D, Molina AB, Daniells J, Fourie G, Hermanto C, Chao CP, Fabregar E, Sinohin VG, Masdek N, Thangavelu R, Li C, Yi G, Mostert L, Viljoen A. The distribution and host range of the banana Fusarium wilt fungus, Fusarium oxysporum f. sp. cubense, in Asia. PLoS One 2017; 12:e0181630. [PMID: 28719631 PMCID: PMC5515439 DOI: 10.1371/journal.pone.0181630] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 07/04/2017] [Indexed: 11/24/2022] Open
Abstract
Fusarium oxysporum formae specialis cubense (Foc) is a soil-borne fungus that causes Fusarium wilt, which is considered to be the most destructive disease of bananas. The fungus is believed to have evolved with its host in the Indo-Malayan region, and from there it was spread to other banana-growing areas with infected planting material. The diversity and distribution of Foc in Asia was investigated. A total of 594 F. oxysporum isolates collected in ten Asian countries were identified by vegetative compatibility groups (VCGs) analysis. To simplify the identification process, the isolates were first divided into DNA lineages using PCR-RFLP analysis. Six lineages and 14 VCGs, representing three Foc races, were identified in this study. The VCG complex 0124/5 was most common in the Indian subcontinent, Vietnam and Cambodia; whereas the VCG complex 01213/16 dominated in the rest of Asia. Sixty-nine F. oxysporum isolates in this study did not match any of the known VCG tester strains. In this study, Foc VCG diversity in Bangladesh, Cambodia and Sri Lanka was determined for the first time and VCGs 01221 and 01222 were first reported from Cambodia and Vietnam. New associations of Foc VCGs and banana cultivars were recorded in all the countries where the fungus was collected. Information obtained in this study could help Asian countries to develop and implement regulatory measures to prevent the incursion of Foc into areas where it does not yet occur. It could also facilitate the deployment of disease resistant banana varieties in infested areas.
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Affiliation(s)
- Diane Mostert
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Agustin B. Molina
- Bioversity International–Asia Pacific, IRRI campus, Los Banos, Philippines
| | - Jeff Daniells
- Department of Agriculture and Fisheries, South Johnstone, Queensland, Australia
| | - Gerda Fourie
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - Catur Hermanto
- Indonesian Agency for Agriculture Research and Development, Jakarta, Indonesia
| | | | - Emily Fabregar
- Lapanday Foods Corporation, Barrio Pampanga, Lanang, Davao City, Philippines
| | - Vida G. Sinohin
- Bioversity International–Asia Pacific, IRRI campus, Los Banos, Philippines
| | - Nik Masdek
- Malaysian Agricultural Research and Development Institute, Selangor, Malaysia
| | - Raman Thangavelu
- ICAR-National Research Center for Banana, Tiruchirappalli, Tamil Nadu, India
| | - Chunyu Li
- Guangdong Academy of Agricultural Sciences, Institution of Fruit Tree Research, Guangzhou, Guangdong Province, China
| | - Ganyun Yi
- Guangdong Academy of Agricultural Sciences, Institution of Fruit Tree Research, Guangzhou, Guangdong Province, China
| | - Lizel Mostert
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, South Africa
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Abstract
Familial hypercholesterolaemia (FH) is a relatively common autosomal dominant genetic condition leading to premature ischaemic vascular disease and mortality if left untreated. Currently, a universal consensus on the diagnostic criteria of FH does not exist but the diagnosis of FH largely relies on the evaluation of low density lipoprotein-cholesterol (LDL-C) levels, a careful documentation of family history, and the identification of clinical features. Diagnosis based purely on lipid levels remains common but there are several limitations to this method of diagnosis both practically and in the proportion of false-negatives and false-positives detected, resulting in substantial under-diagnosis of FH. In some countries, diagnostic algorithms are supplemented with genetic testing of the index case as well as genetic and lipid testing of relatives of the index case. Such "cascade" screening of families following identification of index cases appears to not only improve the rate of diagnosis but is also cost-effective. Currently, we observe a great variation in the excess mortality among patients with FH, which likely reflects a combination of additional genetic and environmental effects on risk overlaid on the risk associated with FH. Current accepted drug therapies for FH include statins and PSCK9 inhibitors. Further work is required to evaluate the cardiovascular disease risk in patients with genetically diagnosed FH and to determine whether a risk-based approach to the treatment of FH is appropriate.
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Affiliation(s)
- D P Hughes
- Department Metabolic Medicine/Chemical Pathology, Lister Hospital, Stevenage, SG1 4AB, UK
| | - A Viljoen
- Department Metabolic Medicine/Chemical Pathology, Lister Hospital, Stevenage, SG1 4AB, UK.
| | - A S Wierzbicki
- Department Metabolic Medicine/Chemical Pathology, Guy's & St Thomas' Hospitals, St Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK
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Beukes I, Rose LJ, Shephard GS, Flett CF, Viljoen A. Mycotoxigenic Fusarium species associated with grain crops in South Africa – A review. S AFR J SCI 2017. [DOI: 10.17159/sajs.2017/20160121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Abstract
Cereal grains include some of the most important crops grown in South Africa and play a major role in the local economy. Maize, wheat and sorghum are extensively consumed by humans and farm animals, and are also utilised in industrial processes. Grain crops that are grown commercially contribute up to 33% of the country’s total gross agricultural production, whereas subsistence farmers grow grains mainly to sustain their families. In rural communities an average intake of maize grain of more than 300 g dry weight per person per day is not uncommon. The production of grains is often constrained by pests and diseases that may reduce their yields and quality. In South Africa, 33 mycotoxin-producing Fusarium species have been associated with grain crops. Mycotoxins, such as fumonisins and deoxynivalenol, have been found in levels exceeding the maximum levels imposed by the US Food and Drug Administration and the European Union and therefore pose a serious public health concern. We provide an extensive overview of mycotoxigenic Fusarium species associated with grain crops in South Africa, with particular reference to maize, wheat and sorghum.
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Crous P, Wingfield M, Burgess T, Hardy G, Crane C, Barrett S, Cano-Lira J, Le Roux J, Thangavel R, Guarro J, Stchigel A, Martín M, Alfredo D, Barber P, Barreto R, Baseia I, Cano-Canals J, Cheewangkoon R, Ferreira R, Gené J, Lechat C, Moreno G, Roets F, Shivas R, Sousa J, Tan Y, Wiederhold N, Abell S, Accioly T, Albizu J, Alves J, Antoniolli Z, Aplin N, Araújo J, Arzanlou M, Bezerra J, Bouchara JP, Carlavilla J, Castillo A, Castroagudín V, Ceresini P, Claridge G, Coelho G, Coimbra V, Costa L, da Cunha K, da Silva S, Daniel R, de Beer Z, Dueñas M, Edwards J, Enwistle P, Fiuza P, Fournier J, García D, Gibertoni T, Giraud S, Guevara-Suarez M, Gusmão L, Haituk S, Heykoop M, Hirooka Y, Hofmann T, Houbraken J, Hughes D, Kautmanová I, Koppel O, Koukol O, Larsson E, Latha K, Lee D, Lisboa D, Lisboa W, López-Villalba Á, Maciel J, Manimohan P, Manjón J, Marincowitz S, Marney T, Meijer M, Miller A, Olariaga I, Paiva L, Piepenbring M, Poveda-Molero J, Raj K, Raja H, Rougeron A, Salcedo I, Samadi R, Santos T, Scarlett K, Seifert K, Shuttleworth L, Silva G, Silva M, Siqueira J, Souza-Motta C, Stephenson S, Sutton D, Tamakeaw N, Telleria M, Valenzuela-Lopez N, Viljoen A, Visagie C, Vizzini A, Wartchow F, Wingfield B, Yurchenko E, Zamora J, Groenewald J. Fungal Planet description sheets: 469-557. Persoonia 2016; 37:218-403. [PMID: 28232766 PMCID: PMC5315290 DOI: 10.3767/003158516x694499] [Citation(s) in RCA: 151] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 11/12/2016] [Indexed: 01/18/2023]
Abstract
Novel species of fungi described in this study include those from various countries as follows: Australia: Apiognomonia lasiopetali on Lasiopetalum sp., Blastacervulus eucalyptorum on Eucalyptus adesmophloia, Bullanockia australis (incl. Bullanockia gen. nov.) on Kingia australis, Caliciopsis eucalypti on Eucalyptus marginata, Celerioriella petrophiles on Petrophile teretifolia, Coleophoma xanthosiae on Xanthosia rotundifolia, Coniothyrium hakeae on Hakea sp., Diatrypella banksiae on Banksia formosa, Disculoides corymbiae on Corymbia calophylla, Elsinoë eelemani on Melaleuca alternifolia, Elsinoë eucalyptigena on Eucalyptus kingsmillii, Elsinoë preissianae on Eucalyptus preissiana, Eucasphaeria rustici on Eucalyptus creta, Hyweljonesia queenslandica (incl. Hyweljonesia gen. nov.) on the cocoon of an unidentified microlepidoptera, Mycodiella eucalypti (incl. Mycodiella gen. nov.) on Eucalyptus diversicolor, Myrtapenidiella sporadicae on Eucalyptus sporadica, Neocrinula xanthorrhoeae (incl. Neocrinula gen. nov.) on Xanthorrhoea sp., Ophiocordyceps nooreniae on dead ant, Phaeosphaeriopsis agavacearum on Agave sp., Phlogicylindrium mokarei on Eucalyptus sp., Phyllosticta acaciigena on Acacia suaveolens, Pleurophoma acaciae on Acacia glaucoptera, Pyrenochaeta hakeae on Hakea sp., Readeriella lehmannii on Eucalyptus lehmannii, Saccharata banksiae on Banksia grandis, Saccharata daviesiae on Daviesia pachyphylla, Saccharata eucalyptorum on Eucalyptus bigalerita, Saccharata hakeae on Hakea baxteri, Saccharata hakeicola on Hakea victoria, Saccharata lambertiae on Lambertia ericifolia, Saccharata petrophiles on Petrophile sp., Saccharata petrophilicola on Petrophile fastigiata, Sphaerellopsis hakeae on Hakea sp., and Teichospora kingiae on Kingia australis.Brazil: Adautomilanezia caesalpiniae (incl. Adautomilanezia gen. nov.) on Caesalpina echinata, Arthrophiala arthrospora (incl. Arthrophiala gen. nov.) on Sagittaria montevidensis, Diaporthe caatingaensis (endophyte from Tacinga inamoena), Geastrum ishikawae on sandy soil, Geastrum pusillipilosum on soil, Gymnopus pygmaeus on dead leaves and sticks, Inonotus hymenonitens on decayed angiosperm trunk, Pyricularia urashimae on Urochloa brizantha, and Synnemellisia aurantia on Passiflora edulis. Chile: Tubulicrinis australis on Lophosoria quadripinnata.France: Cercophora squamulosa from submerged wood, and Scedosporium cereisporum from fluids of a wastewater treatment plant. Hawaii: Beltraniella acaciae, Dactylaria acaciae, Rhexodenticula acaciae, Rubikia evansii and Torula acaciae (all on Acacia koa).India: Lepidoderma echinosporum on dead semi-woody stems, and Rhodocybe rubrobrunnea from soil. Iran: Talaromyces kabodanensis from hypersaline soil. La Réunion: Neocordana musarum from leaves of Musa sp. Malaysia: Anungitea eucalyptigena on Eucalyptus grandis × pellita, Camptomeriphila leucaenae (incl. Camptomeriphila gen. nov.) on Leucaena leucocephala, Castanediella communis on Eucalyptus pellita, Eucalyptostroma eucalypti (incl. Eucalyptostroma gen. nov.) on Eucalyptus pellita, Melanconiella syzygii on Syzygium sp., Mycophilomyces periconiae (incl. Mycophilomyces gen. nov.) as hyperparasite on Periconia on leaves of Albizia falcataria, Synnemadiella eucalypti (incl. Synnemadiella gen. nov.) on Eucalyptus pellita, and Teichospora nephelii on Nephelium lappaceum.Mexico: Aspergillus bicephalus from soil. New Zealand: Aplosporella sophorae on Sophora microphylla, Libertasomyces platani on Platanus sp., Neothyronectria sophorae (incl. Neothyronectria gen. nov.) on Sophora microphylla, Parastagonospora phoenicicola on Phoenix canariensis, Phaeoacremonium pseudopanacis on Pseudopanax crassifolius, Phlyctema phoenicis on Phoenix canariensis, and Pseudoascochyta novae-zelandiae on Cordyline australis.Panama: Chalara panamensis from needle litter of Pinus cf. caribaea. South Africa: Exophiala eucalypti on leaves of Eucalyptus sp., Fantasmomyces hyalinus (incl. Fantasmomyces gen. nov.) on Acacia exuvialis, Paracladophialophora carceris (incl. Paracladophialophora gen. nov.) on Aloe sp., and Umthunziomyces hagahagensis (incl. Umthunziomyces gen. nov.) on Mimusops caffra.Spain: Clavaria griseobrunnea on bare ground in Pteridium aquilinum field, Cyathus ibericus on small fallen branches of Pinus halepensis, Gyroporus pseudolacteus in humus of Pinus pinaster, and Pseudoascochyta pratensis (incl. Pseudoascochyta gen. nov.) from soil. Thailand: Neoascochyta adenii on Adenium obesum, and Ochroconis capsici on Capsicum annuum. UK: Fusicolla melogrammae from dead stromata of Melogramma campylosporum on bark of Carpinus betulus. Uruguay: Myrmecridium pulvericola from house dust. USA: Neoscolecobasidium agapanthi (incl. Neoscolecobasidium gen. nov.) on Agapanthus sp., Polyscytalum purgamentum on leaf litter, Pseudopithomyces diversisporus from human toenail, Saksenaea trapezispora from knee wound of a soldier, and Sirococcus quercus from Quercus sp. Morphological and culture characteristics along with DNA barcodes are provided.
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Affiliation(s)
- P.W. Crous
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - M.J. Wingfield
- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - T.I. Burgess
- Centre for Phytophthora Science and Management, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - G.E.St.J. Hardy
- Centre for Phytophthora Science and Management, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - C. Crane
- Department of Parks and Wildlife, Vegetation Health Service, Locked Bag 104, Bentley Delivery Centre, Bentley, WA 6983, Australia
| | - S. Barrett
- Department of Parks and Wildlife Albany District, 120 Albany Highway, Albany, WA 6330, Australia
| | - J.F. Cano-Lira
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - J.J. Le Roux
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Matieland 7602, South Africa
| | - R. Thangavel
- Plant Health & Environment Laboratory, Ministry for Primary Industries, Manatū Ahu Matua, 231 Morrin Road, St Johns, Auckland 1072, P.O. Box 2095, Auckland 1140, New Zealand
| | - J. Guarro
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - A.M. Stchigel
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - M.P. Martín
- Departamento de Micología, Real Jardín Botánico-CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - D.S. Alfredo
- Pós-graduação em Sistemática e Evolução, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - P.A. Barber
- ArborCarbon, 1 City Farm Place, East Perth, Western Australia, 6004 Australia
| | - R.W. Barreto
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - I.G. Baseia
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - J. Cano-Canals
- I.E.S Gabriel Ferrater i Soler, Ctra. de Montblanc, 5-9, 43206 Reus, Tarragona, Spain
| | - R. Cheewangkoon
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - R.J. Ferreira
- Pós-graduação em Biologia de Fungos, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - J. Gené
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - C. Lechat
- Ascofrance, 64 route de Chizé, 79360 Villiers en Bois, France
| | - G. Moreno
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - F. Roets
- Department of Conservation Ecology and Entomology, Stellenbosch University, South Africa
| | - R.G. Shivas
- Department of Agriculture and Fisheries, GPO Box 267, Brisbane 4001, Queensland, Australia
| | - J.O. Sousa
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Y.P. Tan
- Department of Agriculture and Fisheries, GPO Box 267, Brisbane 4001, Queensland, Australia
| | - N.P. Wiederhold
- Fungus Testing Laboratory, Department of Pathology, University of Texas Health Science Center, 7703 Floyd Curl Dr., San Antonio, Texas 78229-3900, USA
| | - S.E. Abell
- Australian Tropical Herbarium, James Cook University, PO Box 6811, Cairns 4870, Queensland, Australia
| | - T. Accioly
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - J.L. Albizu
- Aranzadi Society of Sciences, Mycology section, Zorroagagaina 11, P.C. 200014, Donostia-San Sebastián, Spain
| | - J.L. Alves
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - Z.I. Antoniolli
- Programa de Pós-graduação em Ciência do Solo, CCR, Universidade Federal de Santa Maria, Av. Roraima n°1000, Campus, Bairro Camobi, CEP 97105-900, Santa Maria, RS, Brasil
| | - N. Aplin
- 21 Shetland Close, Pound Hill, Crawley, West Sussex RH10 7YZ, England, UK
| | - J. Araújo
- Center of Infectious Disease Dynamics, Millennium Science Complex, University Park Campus, Pennsylvania State University, USA
| | - M. Arzanlou
- Plant Protection Department, Faculty of Agriculture, University of Tabriz, P.O. Box 5166614766, Tabriz, Iran
| | - J.D.P. Bezerra
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - J.-P. Bouchara
- GEIHP - EA 3142, Université d’Angers, Institut de Biologie en Santé PBH-IRIS CHU, 4 Rue Larrey, 49933 Angers Cedex 9, France
| | - J.R. Carlavilla
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - A. Castillo
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - V.L. Castroagudín
- UNESP-University of São Paulo State, Av. Brasil no. 56, 15385-000, Ilha Solteira, São Paulo, Brazil
| | - P.C. Ceresini
- UNESP-University of São Paulo State, Av. Brasil no. 56, 15385-000, Ilha Solteira, São Paulo, Brazil
| | | | - G. Coelho
- Departamento de Fundamentos da Educação, CCR, Universidade Federal de Santa Maria, Av. Roraima n°1000, Campus, Bairro Camobi, CEP 97105-900, Santa Maria, RS, Brasil
| | - V.R.M. Coimbra
- Departamento de Micologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Av. Prof. Nelson Chaves, s/n, 50670-901 Recife, Pernambuco, Brazil
| | - L.A. Costa
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - K.C. da Cunha
- Dermatology Laboratory (SML), University Hospital of Geneva, Rue Gabrielle Perret-Gentil 4, 1205 Genève, Geneva, Switzerland
| | - S.S. da Silva
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - R. Daniel
- Elizabeth Macarthur Agricultural Institute, Department of Primary Industries, Private Bag 4008, Narellan 2567, Australia
| | - Z.W. de Beer
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - M. Dueñas
- Departamento de Micología, Real Jardín Botánico-CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - J. Edwards
- AgriBio Centre for AgriBiosciences, Department of Economic Development, Jobs, Transport and Resources, 5 Ring Road, LaTrobe University, Bundoora, Victoria 3083 Australia
| | - P. Enwistle
- North East Agricultural Services, McLeans Ridges 2480, NSW, Australia
| | - P.O. Fiuza
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | | | - D. García
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - T.B. Gibertoni
- Departamento de Micologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Av. Prof. Nelson Chaves, s/n, 50670-901 Recife, Pernambuco, Brazil
| | - S. Giraud
- GEIHP - EA 3142, Université d’Angers, Institut de Biologie en Santé PBH-IRIS CHU, 4 Rue Larrey, 49933 Angers Cedex 9, France
| | - M. Guevara-Suarez
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - L.F.P. Gusmão
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - S. Haituk
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - M. Heykoop
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - Y. Hirooka
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Clinical Plant Science, Faculty of Bioscience, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo, Japan
| | - T.A. Hofmann
- Herbarium UCH, Mycological Research Center (CIMi), Autonomous University of Chiriquí (UNACHI), 0427, David, Chiriquí Province, Panama
| | - J. Houbraken
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
| | - D.P. Hughes
- Center of Infectious Disease Dynamics, Millennium Science Complex, University Park Campus, Pennsylvania State University, USA
| | - I. Kautmanová
- Slovak National Museum-Natural History Museum, P.O. Box 13, 810 06 Bratislava, Slovakia
| | - O. Koppel
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - O. Koukol
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-12801, Praha 2, Czech Republic
| | - E. Larsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30 Göteborg, Sweden
| | - K.P.D. Latha
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - D.H. Lee
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0002, South Africa
| | - D.O. Lisboa
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - W.S. Lisboa
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - Á. López-Villalba
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - J.L.N. Maciel
- Brazilian Agriculture Research Corporation-Wheat (EMBRAPA-Trigo), Caixa Postal 3081, Rodovia BR-285 Km 294, 99050-970 Passo Fundo, Rio Grande do Sul, Brazil
| | - P. Manimohan
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - J.L. Manjón
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - S. Marincowitz
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - T.S. Marney
- Department of Agriculture and Fisheries, GPO Box 267, Brisbane 4001, Queensland, Australia
| | - M. Meijer
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
| | - A.N. Miller
- University of Illinois Urbana-Champaign, Illinois Natural History Survey, 1816 South Oak Street, Champaign, Illinois, 61820, USA
| | - I. Olariaga
- University of the Basque Country (UPV/EHU), Apdo. 644, E-48080 Bilbao, Spain
| | - L.M. Paiva
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - M. Piepenbring
- Department of Mycology, Cluster for Integrative Fungal Research (IPF), Institute for Ecology, Evolution and Diversity, Goethe University, Max-von-Laue-Str. 13, DE-60438 Frankfurt am Main, Germany
| | | | - K.N.A. Raj
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - H.A. Raja
- University of North Carolina, Department of Chemistry and Biochemistry, Greensboro, North Carolina, 27402, USA
| | - A. Rougeron
- GEIHP - EA 3142, Université d’Angers, Institut de Biologie en Santé PBH-IRIS CHU, 4 Rue Larrey, 49933 Angers Cedex 9, France
| | - I. Salcedo
- University of the Basque Country (UPV/EHU), Apdo. 644, E-48080 Bilbao, Spain
| | - R. Samadi
- Plant Protection Department, Faculty of Agriculture, University of Tabriz, P.O. Box 5166614766, Tabriz, Iran
| | - T.A.B. Santos
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - K. Scarlett
- Faculty of Agriculture and Environment, The University of Sydney, Sydney 2006, Australia
| | - K.A. Seifert
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - L.A. Shuttleworth
- Elizabeth Macarthur Agricultural Institute, Department of Primary Industries, Private Bag 4008, Narellan 2567, Australia
| | - G.A. Silva
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - M. Silva
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - J.P.Z. Siqueira
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - C.M. Souza-Motta
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - S.L. Stephenson
- Department of Biological Sciences, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - D.A. Sutton
- Fungus Testing Laboratory, Department of Pathology, University of Texas Health Science Center, 7703 Floyd Curl Dr., San Antonio, Texas 78229-3900, USA
| | - N. Tamakeaw
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - M.T. Telleria
- Departamento de Micología, Real Jardín Botánico-CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - N. Valenzuela-Lopez
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - A. Viljoen
- Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Stellenbosch 7602, South Africa
| | - C.M. Visagie
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - A. Vizzini
- Department of Life Sciences and Systems Biology, University of Torino, Viale P.A. Mattioli 25, I-10125 Torino, Italy
| | - F. Wartchow
- Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, 58051-900 João Pessoa, Paraíba, Brazil
| | - B.D. Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0002, South Africa
| | - E. Yurchenko
- Department of Biotechnology, Paleski State University, Dnyaprouskai flatylii str. 23, BY-225710, Pinsk, Belarus
| | - J.C. Zamora
- Departamento de Biología Vegetal II, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain
| | - J.Z. Groenewald
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
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Rose LJ, Mouton M, Beukes I, Flett BC, van der Vyver C, Viljoen A. Multi-environment Evaluation of Maize Inbred Lines for Resistance to Fusarium Ear Rot and Fumonisins. Plant Dis 2016; 100:2134-2144. [PMID: 30683004 DOI: 10.1094/pdis-11-15-1360-re] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fusarium verticillioides causes Fusarium ear rot (FER) of maize and produces fumonisins, which affects grain quality. Host-plant resistance can reduce both FER and fumonisins in maize. In this study, 18 maize inbred lines were evaluated for resistance to F. verticillioides and fumonisin accumulation at five localities in South Africa. Additive main effects and multiplicative interaction analyses revealed significant environment × genotype interactions, with inbred lines CML 390, US 2540W, RO 424W, and VO 617y-2 consistently exhibiting low FER severity (≤5.4%), fungal target DNA (≤0.1 ng μl-1), and fumonisin levels (≤5.6 ppm). Genotype main effect and genotype × environment biplots showed that inbred lines CML 390, US 2540W, and RO 424W were most resistant to FER, fungal colonization, and fumonisin accumulation, respectively, while inbred line RO 424W was most stable in its resistance response over environments. These inbred lines also demonstrated broad adaptability by consistently exhibiting resistance to FER, fungal colonization, and fumonisins across localities. The identified lines could serve as valuable sources of resistance against F. verticillioides and its fumonisins in local breeding programs.
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Affiliation(s)
- L J Rose
- Department of Plant Pathology, Stellenbosch University, Matieland 7602, South Africa
| | - M Mouton
- Department of Plant Pathology, Stellenbosch University, Matieland 7602, South Africa
| | - I Beukes
- Department of Plant Pathology, Stellenbosch University, Matieland 7602, South Africa
| | - B C Flett
- Grain Crops Institute, Agricultural Research Council, Potchefstroom 2520, South Africa
| | | | - A Viljoen
- Department of Plant Pathology, Stellenbosch University
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Gratwick Z, Viljoen A, Page PC, Goddard A, Fosgate GT, Lyle CH. A comparison of the effects of a 4% modified fluid gelatin and a 6% hydroxyethyl starch on haemodilution, colloid osmotic pressure, haemostasis and renal parameters in healthy ponies. Equine Vet J 2016; 49:363-368. [DOI: 10.1111/evj.12594] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 05/18/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Z. Gratwick
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - P. C. Page
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - A. Goddard
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - G. T. Fosgate
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - C. H. Lyle
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
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Viljoen A, Cyrus D. A preliminary investigation of the effects of an Inter Basin Transfer on the ichthyofauna of a small river in northern KwaZulu-Natal,South Africa. African Zoology 2015. [DOI: 10.1080/15627020.2003.11657206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Gratwick Z, Viljoen A, Page P, Goddard A, Fosgate G, Lyle C. A Comparison of A 4% Modified Fluid Gelatin and A 6% Hydroxyethyl Starch on Haemodilution, Colloid Osmotic Pressure, Haemostasis and Renal Parameters in Healthy Ponies. Equine Vet J 2015. [DOI: 10.1111/evj.12486_42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Z. Gratwick
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - P.C. Page
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - A. Goddard
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - G.T. Fosgate
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - C.H. Lyle
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
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Abstract
The beauty of science is that well-conducted experiments provide answers to questions which were posed in times of greater ignorance. Cardiovascular disease (CVD) is the leading cause of death worldwide and will be for some time. Cholesterol is a critical player which drives the underlying pathophysiological process of atherosclerosis. Statins are the first line treatment for lipids in CVD given their ability to low-density lipoprotein cholesterol (LDL-C) by up to 50%, and their proven benefits in both primary and secondary intervention . Despite the unprecedented efficacy of statins, additional treatments are sought to potentially reduce the residual risk that remains despite statin treatment such as that associated with reduced high-density lipoprotein cholesterol levels (HDL-C) or triglycerides . In the last 5 years, several trials have reported on their potential additional benefit beyond statin therapy. These include omega-3 fatty acids in patients with prediabetes or diabetes , fibrates in diabetes , nicotinic acid/niacin in cardiovascular disease and cholesterol ester transfer protein inhibitors in cardiovascular disease . Despite their promise, none of these treatments were able to demonstrate benefit beyond baseline statin therapy when compared with placebo . The idea that benefit beyond statin treatment may be an unachievable goal has dogged the medical community working on CVD prevention. The phrase, 'Statins for atherosclerosis - as good as it gets?' was coined in 2005 and has rung true up until now .
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Affiliation(s)
- A Viljoen
- Department of Metabolic Medicine/Chemical Pathology, Lister Hospital, Stevenage, Hertfordshire, UK
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Sanz MG, Viljoen A, Saulez MN, Olorunju S, Andrews FM. Efficacy of a pectin-lecithin complex for treatment and prevention of gastric ulcers in horses. Vet Rec 2014; 175:147. [DOI: 10.1136/vr.102359] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- M. G. Sanz
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
- Department of Veterinary Science; Maxwell H. Gluck Equine Research Center; University of Kentucky; Lexington KY 40546 USA
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
| | - M. N. Saulez
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
- Drakenstein Veterinary Clinic; Western Cape 7599 South Africa
| | - S. Olorunju
- The Biostatistics Unit; Medical Research Council of South Africa; Pretoria 0001 South Africa
| | - F. M. Andrews
- The Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Louisiana 70803 USA
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Viljoen A, Page PC, Fosgate GT, Saulez MN. Coagulation, oncotic and haemodilutional effects of a third-generation hydroxyethyl starch (130/0.4) solution in horses. Equine Vet J 2014; 46:739-44. [PMID: 24372968 DOI: 10.1111/evj.12223] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 12/13/2013] [Indexed: 11/27/2022]
Abstract
REASONS FOR PERFORMING STUDY Clinical indications for hydroxyethyl starches (HES) in horses include rapid plasma volume expansion and oncotic support during periods of hypoproteinaemia. Side effects such as coagulopathies associated with HES administration pose limitations to their use in veterinary medicine. In man, tetrastarch (130/0.4) has demonstrated less profound effects on coagulation compared with first- and second-generation HES. OBJECTIVES To evaluate the haemostatic and oncotic effects of tetrastarch (130/0.4) administered at 10, 20 and 40 ml/kg bwt in healthy horses. STUDY DESIGN Randomised crossover experiment. METHODS Tetrastarch (130/0.4) was administered to 6 healthy pony mares at 10, 20 and 40 ml/kg bwt with a 2-week washout period. Packed cell volume, plasma total solids, colloid osmotic pressure (COP), platelet count and thromboelastography (TEG) were measured at baseline, immediately after infusion (0 h), and 1, 6, 12, 24, 48 and 96 h after tetrastarch infusion. RESULTS All TEG variables remained within normal reference ranges in all 3 treatment groups. Administration of tetrastarch at 40 ml/kg bwt resulted in a prolonged K-time (P = 0.049) at 6 h post infusion, and decreased maximum amplitude at 0 (P<0.001), 1 (P = 0.022), 6 (P = 0.006), 24 (P<0.001) and 48 h (P = 0.013) post infusion compared with baseline. Administration of tetrastarch increased mean COP values above baseline in all 3 treatment groups, persisting to 24, 6 and 48 h for the 10, 20 and 40 ml/kg bwt doses, respectively. CONCLUSIONS Although still within established reference ranges, compared with lower dosages, the administration of 40 ml/kg bwt tetrastarch (130/0.4) is more likely to induce changes in coagulation as measured by TEG. Tetrastarch increased COP at all dosages evaluated in healthy horses. Tetrastarch (130/0.4) at 10 and 20 ml/kg bwt has potential as a synthetic colloid for resuscitation and provision of oncotic support in horses.
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Affiliation(s)
- A Viljoen
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
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Li C, Zuo C, Deng G, Kuang R, Yang Q, Hu C, Sheng O, Zhang S, Ma L, Wei Y, Yang J, Liu S, Biswas MK, Viljoen A, Yi G. Contamination of bananas with beauvericin and fusaric acid produced by Fusarium oxysporum f. sp. cubense. PLoS One 2013; 8:e70226. [PMID: 23922960 PMCID: PMC3724834 DOI: 10.1371/journal.pone.0070226] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 06/17/2013] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Fusarium wilt, caused by the fungal pathogen Fusarium oxysporum f. sp. cubense (Foc), is one of the most destructive diseases of banana. Toxins produced by Foc have been proposed to play an important role during the pathogenic process. The objectives of this study were to investigate the contamination of banana with toxins produced by Foc, and to elucidate their role in pathogenesis. METHODOLOGY/PRINCIPAL FINDINGS Twenty isolates of Foc representing races 1 and 4 were isolated from diseased bananas in five Chinese provinces. Two toxins were consistently associated with Foc, fusaric acid (FA) and beauvericin (BEA). Cytotoxicity of the two toxins on banana protoplast was determined using the Alamar Blue assay. The virulence of 20 Foc isolates was further tested by inoculating tissue culture banana plantlets, and the contents of toxins determined in banana roots, pseudostems and leaves. Virulence of Foc isolates correlated well with toxin deposition in the host plant. To determine the natural occurrence of the two toxins in banana plants with Fusarium wilt symptoms, samples were collected before harvest from the pseudostems, fruit and leaves from 10 Pisang Awak 'Guangfen #1' and 10 Cavendish 'Brazilian' plants. Fusaric acid and BEA were detected in all the tissues, including the fruits. CONCLUSIONS/SIGNFICANCE The current study provides the first investigation of toxins produced by Foc in banana. The toxins produced by Foc, and their levels of contamination of banana fruits, however, were too low to be of concern to human and animal health. Rather, these toxins appear to contribute to the pathogenicity of the fungus during infection of banana plants.
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Affiliation(s)
- Chunyu Li
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
| | - Cunwu Zuo
- The College of Life Science, South China Agricultural University, Guangzhou, China
| | - Guiming Deng
- The College of Life Science, South China Agricultural University, Guangzhou, China
| | - Ruibin Kuang
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
| | - Qiaosong Yang
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
| | - Chunhua Hu
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
| | - Ou Sheng
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
| | - Sheng Zhang
- Proteomics and Mass Spectrometry Core Facility, Cornell University, Ithaca, New York, United States of America
| | - Lijun Ma
- Plant Pathology, Plant Soil and Insect Sciences, The College of Nature Sciences, University of Massachusetts, Broad Institute, Cambridge, Massachusetts, United States of America
| | - Yuerong Wei
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
| | - Jing Yang
- The College of Life Science, South China Agricultural University, Guangzhou, China
| | - Siwen Liu
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Manosh Kumar Biswas
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
- The College of Life Science, South China Agricultural University, Guangzhou, China
| | - Altus Viljoen
- Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Matieland, South Africa
| | - Ganjun Yi
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong Province, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou, China
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Krentz AJ, Viljoen A, Sinclair A. Insulin resistance: a risk marker for disease and disability in the older person. Diabet Med 2013; 30:535-48. [PMID: 23173973 DOI: 10.1111/dme.12063] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 11/06/2012] [Indexed: 12/24/2022]
Abstract
Clinical metabolic studies have demonstrated that insulin action declines progressively with age in humans. In addition to its close association with Type 2 diabetes, which reduces life expectancy in older people, age-related insulin resistance is implicated in pathogenesis of several highly prevalent disorders for which ageing is a major risk factor. These include atherosclerotic cardiovascular disease, dementia, frailty and cancer. Accordingly, insulin resistance may be viewed as biomarker of age-related ill health and reduced lifespan. The rapidly rising number of older people, coupled with a high prevalence of insulin resistance resulting from obesity and sedentary lifestyles, presents unprecedented public health and societal challenges. Studies of centenarians have shown that preserved whole-body sensitivity to insulin is associated with longevity. The mechanisms through which insulin action is associated with age-related diseases remain unclear. Changes in body composition, i.e. sarcopenia and excess adiposity, may be more potent than age per se. Moreover, the impact of insulin resistance has been difficult to disentangle from the clustering of vascular risk factors that co-segregate with the insulin resistance-hyperinsulinaemia complex. Potentially modifiable mediators of age-related changes in insulin sensitivity include alterations in adipocytokines, impaired skeletal myocyte mitochondrial function and brown fat activity. The hypothesis that improving or maintaining insulin sensitivity preserves health and extends lifespan merits further evaluation. Practical non-pharmacological interventions directed against age-related insulin resistance remain underdeveloped. Novel metabolically active pharmacological agents with theoretical implications for some age-related disorders are entering clinical trials. However, recent adverse experiences with the thiazolidinediones suggest the need for a cautious approach to the use of insulin sensitizing drugs in older people. This could be particularly important in the absence of diabetes where the risk to benefit analysis may be less favourable.
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Affiliation(s)
- A J Krentz
- Institute of Diabetes for Older People, Bedfordshire & Hertfordshire Postgraduate Medical School, University of Bedfordshire, Luton, UK.
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Geiser DM, Aoki T, Bacon CW, Baker SE, Bhattacharyya MK, Brandt ME, Brown DW, Burgess LW, Chulze S, Coleman JJ, Correll JC, Covert SF, Crous PW, Cuomo CA, De Hoog GS, Di Pietro A, Elmer WH, Epstein L, Frandsen RJN, Freeman S, Gagkaeva T, Glenn AE, Gordon TR, Gregory NF, Hammond-Kosack KE, Hanson LE, Jímenez-Gasco MDM, Kang S, Kistler HC, Kuldau GA, Leslie JF, Logrieco A, Lu G, Lysøe E, Ma LJ, McCormick SP, Migheli Q, Moretti A, Munaut F, O'Donnell K, Pfenning L, Ploetz RC, Proctor RH, Rehner SA, Robert VARG, Rooney AP, Bin Salleh B, Scandiani MM, Scauflaire J, Short DPG, Steenkamp E, Suga H, Summerell BA, Sutton DA, Thrane U, Trail F, Van Diepeningen A, Vanetten HD, Viljoen A, Waalwijk C, Ward TJ, Wingfield MJ, Xu JR, Yang XB, Yli-Mattila T, Zhang N. One fungus, one name: defining the genus Fusarium in a scientifically robust way that preserves longstanding use. Phytopathology 2013; 103:400-8. [PMID: 23379853 DOI: 10.1094/phyto-07-12-0150-le] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
In this letter, we advocate recognizing the genus Fusarium as the sole name for a group that includes virtually all Fusarium species of importance in plant pathology, mycotoxicology, medicine, and basic research. This phylogenetically guided circumscription will free scientists from any obligation to use other genus names, including teleomorphs, for species nested within this clade, and preserve the application of the name Fusarium in the way it has been used for almost a century. Due to recent changes in the International Code of Nomenclature for algae, fungi, and plants, this is an urgent matter that requires community attention. The alternative is to break the longstanding concept of Fusarium into nine or more genera, and remove important taxa such as those in the F. solani species complex from the genus, a move we believe is unnecessary. Here we present taxonomic and nomenclatural proposals that will preserve established research connections and facilitate communication within and between research communities, and at the same time support strong scientific principles and good taxonomic practice.
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