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Félix CR, Navarro HMC, Paulino GVB, Almeida JH, Landell MF. Behind the nectar: the yeast community in bromeliads inflorescences after the exudate removal. Mycol Prog 2021; 20:1191-202. [DOI: 10.1007/s11557-021-01728-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Freitas LFD, Batista TM, Santos ARO, Hilário HO, Moreira RG, Franco GR, Morais PB, Lachance MA, Rosa CA. Yeast communities associated with cacti in Brazil and the description of Kluyveromyces starmeri sp. nov. based on phylogenomic analyses. Yeast 2020; 37:625-637. [PMID: 33161614 DOI: 10.1002/yea.3528] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 11/12/2022] Open
Abstract
Yeast communities associated with cacti were studied in three ecosystems of Southeast, Central and North Brazil. A total of 473 yeast strains belonging to 72 species were isolated from 190 samples collected. Cactophilic yeast species were prevalent in necrotic tissues, flowers, fruits and insects of cacti collected in Southeast and North Brazil. Pichia cactophila, Candida sonorensis and species of the Sporopachydermia complex were the most prevalent cactophilic species in Southeast and Central regions. Kodamaea nitidulidarum, Candida restingae and Wickerhamiella cacticola were frequently associated with cactus flowers and fruits. The diversity of yeasts associated with the substrates studied was high. Twenty-one novel species were found. One is described here as Kluyveromyces starmeri sp. nov. based on 21 isolates obtained from necrotic tissues, flowers, fruits and associated insects of the columnar cacti Cereus saddianus, Micranthocereus dolichospermaticus and Pilosocereus arrabidae in two different ecosystems in Brazil. Phylogenetic analyses of sequences encoding the gene of the small subunit (SSU) rRNA gene, the internal transcribed spacer, the 5.8S rRNA gene and the D1/D2 domains of the large subunit (LSU) rRNA showed that the species is related to Kluyveromyces dobzhanskii, Kluyveromyces lactis and Kluyveromyces marxianus. Phylogenomic analyses based on 1264 conserved genes shared among the new species and 19 other members of the Saccharomycetaceae confirmed this phylogenetic relationship. The holotype is K. starmeri sp. nov. CBS 16103T (=UFMG-CM-Y3682T ). The Mycobank number is MB 836817.
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Affiliation(s)
- Larissa F D Freitas
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Thiago M Batista
- Centro de Formação em Ciências Ambientais, Universidade Federal do Sul da Bahia, Porto Seguro, Brazil
| | - Ana R O Santos
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Heron O Hilário
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rennan G Moreira
- Laboratório Multiusuário de Genômica, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Glória R Franco
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Paula B Morais
- Laboratorio de Microbiologia Ambiental e Biotecnologia, Universidade Federal do Tocantins, Palmas, Brazil
| | - Marc-André Lachance
- Department of Biology, University of Western Ontario, London, Ontario, Canada
| | - Carlos A Rosa
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Félix CR, Andrade DA, Almeida JH, Navarro HMC, Fell JW, Landell MF. Vishniacozyma alagoana sp. nov. a tremellomycetes yeast associated with plants from dry and rainfall tropical forests. Int J Syst Evol Microbiol 2020; 70:3449-3454. [PMID: 32375951 DOI: 10.1099/ijsem.0.004193] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Plants are important reservoirs of described and undescribed species of yeast. During a study of yeasts associated with bromeliads from the Northeast region of Brazil (collected in 2013-2017), analysis of the D1/D2 domain of the LSU rRNA and internal transcribed spacer (ITS) region identified eleven strains of yeasts as representing an unknown species of the genus Vishniacozyma. The species may have a diverse habitat in Brazil as a strain was collected from a flowering plant (Acanthaceae) in 1994. As a consequence, we propose Vishniacozyma alagoana sp. nov. as a member of the tremellomycetes yeasts (Agaricomycotina, Basidiomycota). Vishniacozyma alagoana sp. nov. was found in Atlantic Forest (a tropical rainforest) and the Caatinga (a seasonally dry tropical forest) associated with bromeliads in northeast and southeastern Brazil. The proposed novel species is related to Vishniacozyma taibaiensis and distinguished by eight nucleotide substitutions in the D1/D2 domain and seventeen in the ITS region. In addition, Vishniacozyma alagoana sp. nov. differs from V. taibaiensis by the ability to assimilate ribitol. The holotype is CBS 15966T.
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Affiliation(s)
- Ciro Ramon Félix
- Programa de Pós-Graduação em Diversidade Biológica e Conservação nos Trópicos, Universidade Federal de Alagoas, Campus A. C. Simões, Av. Lourival Melo Mota, s/n, CEP: 57072-900, Maceió - AL, Brazil.,Universidade Federal de Alagoas, Maceió - AL, Brazil
| | | | | | - Hector Mauricio Casanova Navarro
- Programa de Pós-Graduação em Diversidade Biológica e Conservação nos Trópicos, Universidade Federal de Alagoas, Campus A. C. Simões, Av. Lourival Melo Mota, s/n, CEP: 57072-900, Maceió - AL, Brazil.,Universidade Federal de Alagoas, Maceió - AL, Brazil
| | - Jack W Fell
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, Key Biscayne, FL, 33149, USA
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de Vega C, Albaladejo RG, Guzmán B, Steenhuisen SL, Johnson SD, Herrera CM, Lachance MA. Flowers as a reservoir of yeast diversity: description of Wickerhamiella nectarea f.a. sp. nov., and Wickerhamiella natalensis f.a. sp. nov. from South African flowers and pollinators, and transfer of related Candida species to the genus Wickerhamiella as new combinations. FEMS Yeast Res 2018; 17:3966713. [PMID: 28810705 DOI: 10.1093/femsyr/fox054] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 05/30/2017] [Accepted: 07/13/2017] [Indexed: 11/14/2022] Open
Abstract
Flowers offer favourable microenvironments for yeast growth, and are increasingly recognised as a rich source of novel yeast species. Independent surveys of yeasts associated with flowers and pollinators in South Africa led to the discovery of 38 strains of two new species. Physiological profiles and analysis of the internal transcribed spacer and the D1/D2 domains of the large subunit rRNA gene showed that they represent two novel species that belong to the Wickerhamiella clade. We describe the species as Wickerhamiella nectarea f.a. sp. nov. (type strain EBDCdVSA11-1T, CBS 14162T, NRRL Y-63791T) and W. natalensis f.a. sp. nov. (type strain EBDCdVSA7-1T, CBS 14161T, NRRL Y-63790T). We extend the known range of flower-associated Wickerhamiella species to South Africa and discuss the ecology and phylogenetic relationships of the clade in relation to its host species and biogeography. Examination of growth characteristics supports that the Wickerhamiella clade exhibits a high degree of evolutionary lability, and that specialisation to different niches may occur rapidly. We review the current status of floral yeast biodiversity and nectar as a reservoir of species diversity, and the importance of pollinators and biogeography. In addition, 18 species formerly assigned to the genus Candida are reassigned formally to the genus Wickerhamiella.
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Affiliation(s)
- Clara de Vega
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Avenida de Américo Vespucio s/n, 41092 Sevilla, Spain
| | - Rafael G Albaladejo
- Departamento de Biología Vegetal y Ecología, Universidad de Sevilla, C/ Profesor García González 2, 41012 Sevilla, Spain
| | - Beatriz Guzmán
- Real Jardín Botánico, CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - Sandy-Lynn Steenhuisen
- Department of Biological Sciences, University of Cape Town, P/Bag, Rondebosch 7701, South Africa
| | - Steven D Johnson
- School of Life Sciences, University of KwaZulu-Natal, P/ Bag X01, Scottsville, Pietermaritzburg 3209, South Africa
| | - Carlos M Herrera
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Avenida de Américo Vespucio s/n, 41092 Sevilla, Spain
| | - Marc-André Lachance
- Department of Biology, University of Western Ontario, London, ON N6A 5B7, Canada
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Moore MR, Cave RD, Branham MA. Annotated catalog and bibliography of the cyclocephaline scarab beetles (Coleoptera, Scarabaeidae, Dynastinae, Cyclocephalini). Zookeys 2018; 745:101-378. [PMID: 29670449 PMCID: PMC5904534 DOI: 10.3897/zookeys.745.23685] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 01/17/2017] [Indexed: 11/12/2022] Open
Abstract
Cyclocephaline scarab beetles represent the second largest tribe of the subfamily Dynastinae, and the group includes the most speciose genus of dynastines, Cyclocephala. The period following publication of Sebő Endrődi's The Dynastinae of the World has seen a huge increase in research interest on cyclocephalines, and much of this research has not been synthesized. The objective of this catalog and bibliography is to compile an exhaustive list of taxa in Cyclocephalini. This paper provides an updated foundation for understanding the taxonomy and classification of 14 genera and over 500 species in the tribe. It discusses the history of cataloging dynastine species, clarifies issues surrounding the neotype designations in Endrődi's revision of Cyclocephalini, synthesizes all published distribution data for cyclocephaline species, and increases accessibility to the voluminous literature on the group by providing an easily searchable bibliography for each species. We propose the nomen novum Cyclocephala rogerpauli, new replacement name, for C. nigra Dechambre.
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Affiliation(s)
- Matthew R. Moore
- Department of Entomology and Nematology, University of Florida, Building 1881 Natural Area Drive, Steinmetz Hall, Gainesville, FL 32611, USA
| | - Ronald D. Cave
- Department of Entomology and Nematology, University of Florida, Indian River Research and Education Center, 2199 South Rock Road, Fort Pierce, FL 34945, USA
| | - Marc A. Branham
- Department of Entomology and Nematology, University of Florida, Building 1881 Natural Area Drive, Steinmetz Hall, Gainesville, FL 32611, USA
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Freitas LFD, Barbosa R, Sampaio JP, Lachance MA, Rosa CA. Starmera pilosocereana sp. nov., a yeast isolated from necrotic tissue of cacti in a sandy coastal dune ecosystem. Int J Syst Evol Microbiol 2015; 65:4474-4478. [DOI: 10.1099/ijsem.0.000596] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two strains of a novel cactophilic yeast species were isolated from the columnar cactus Pilosocereus arrabidae in a sand dune ecosystem in Rio de Janeiro, Brazil. Phylogenetic analysis of sequences of the large subunit rRNA gene D1/D2 domains showed that the strains represent a sister species to Starmera caribaea, from which it differs by 21 nt substitutions and two indels. The novel species is heterothallic and the asci are deliquescent with the formation of two to four hat-shaped ascospores. The name Starmera pilosocereana sp. nov. is proposed for the species. The type strain is UFMG-CM-Y316T ( = CBS 13266T) and the allotype is UFMG-CM-Y346a ( = CBS 13265). The Mycobank number is MB 810683. In addition, Candida stellimalicola belonging to the Starmera clade, is reassigned to Starmera as a new combination.
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Affiliation(s)
- Larissa F. D. Freitas
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo, Horizonte, MG, 31270-901, Brazil
| | - Raquel Barbosa
- UCIBIO@REQUIMTE, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - José Paulo Sampaio
- UCIBIO@REQUIMTE, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Marc-André Lachance
- Department of Biology, University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Carlos A. Rosa
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo, Horizonte, MG, 31270-901, Brazil
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Sperandio EM, Martins do Vale HM, Moreira GAM. Yeasts from native Brazilian Cerrado plants: Occurrence, diversity and use in the biocontrol of citrus green mould. Fungal Biol 2015; 119:984-993. [PMID: 26466874 DOI: 10.1016/j.funbio.2015.06.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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: 12/16/2014] [Revised: 06/11/2015] [Accepted: 06/30/2015] [Indexed: 11/28/2022]
Abstract
Yeasts are some of the most important postharvest biocontrol agents. Postharvest oranges frequently deteriorate due to green mould (Penicillium digitatum), which causes significant losses. The aims of this study were to determine the composition and diversity of yeasts on plants of the Brazilian Cerrado and to explore their potential for inhibiting citrus green mould. Leaves and fruit of Byrsonima crassifolia and Eugenia dysenterica were collected from Cerrado conservation areas, and thirty-five yeasts were isolated and identified by sequencing the D1-D2 domain of the rDNA large subunit (26S). The isolates represented the Aureobasidium, Meyerozyma, Candida, and Pichia genera. Three isolates identified as Aureobasidium pullulans exhibited potential for the control of P. digitatum in both in vitro and in vivo tests; these isolates reduced the incidence of disease and increased the storage time of fruit. Aureobasidium. pullulans has immense potential for the biological control of filamentous fungi.
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Affiliation(s)
- Eugenio Miranda Sperandio
- Departamento de Fitopatologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Distrito Federal, 70910-900, Brazil.
| | - Helson Mario Martins do Vale
- Departamento de Fitopatologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Distrito Federal, 70910-900, Brazil.
| | - Geisianny Augusta Monteiro Moreira
- Departamento de Fitopatologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, Distrito Federal, 70910-900, Brazil.
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Arcuri SL, Pagnocca FC, Melo WGDP, Nagamoto NS, Komura DL, Rodrigues A. Yeasts found on an ephemeral reproductive caste of the leaf-cutting ant Atta sexdens rubropilosa. Antonie Van Leeuwenhoek 2014; 106:475-87. [PMID: 25012689 DOI: 10.1007/s10482-014-0216-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Accepted: 06/12/2014] [Indexed: 11/28/2022]
Abstract
Winged males of leaf-cutting ants are considered an ephemeral reproductive caste only produced before the mating flight season. Although much is known about the yeast diversity found in fungus gardens of attine ants, no study has focused on the yeasts associated with males of leaf-cutting ants. Here, we surveyed the yeasts on the integuments of males of Atta sexdens rubropilosa and assessed their potential role in the attine ant-microbe symbiosis. Using culture-dependent techniques, we found yeasts to be abundant on the integuments of males (54.5 %, n = 200 alates). A total of 242 yeast strains were obtained representing six orders, ten genera and 25 species. Strains of Aureobasidium, Cryptococcus, Hannaella and Rhodotorula were prevalent on the integuments and likely originated from the fungus garden of the parental nest or from the soil. The majority of strains (87.1 %) produced at least one of the evaluated enzymes: pectinase, polygalacturonase, cellulase, xylanase, ligninases and lipase. Aureobasidium pullulans accounted for the highest number of strains that produced all enzymes. In addition, yeasts showed the ability to assimilate the resulting oligosaccharides, supporting observations of other studies that yeasts may be involved in the plant biomass metabolism in the fungus gardens. Because winged males harbor several yeasts with putative functional roles, these fungi may take part and be beneficial in the microbial consortia of the new incipient nest.
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Affiliation(s)
- Silvio Lovato Arcuri
- Centro de Estudos de Insetos Sociais, UNESP - Univ Estadual Paulista, Campus Rio Claro, Rio Claro, SP, Brazil
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Mohamed HM, Metwally A. Effect of Combined Inoculation of Rhizobium with Soil Yeasts on Nodulation,
Growth and Yield of Common Bean (Phaseolus vulgaris L.) Under Field Condition. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/ajpnft.2014.1.10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Golonka AM, Vilgalys R. Nectar Inhabiting Yeasts in Virginian Populations of Silene latifolia (Caryophyllaceae) and Coflowering Species. The American Midland Naturalist 2013. [DOI: 10.1674/0003-0031-169.2.235] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
The scarab beetle tribe Cyclocephalini (Coleoptera: Scarabaeidae: Dynastinae) is the second largest tribe of rhinoceros beetles, with nearly 500 described species. This diverse group is most closely associated with early diverging angiosperm groups (the family Nymphaeaceae, magnoliid clade, and monocots), where they feed, mate, and receive the benefit of thermal rewards from the host plant. Cyclocephaline floral association data have never been synthesized, and a comprehensive review of this ecological interaction was necessary to promote research by updating nomenclature, identifying inconsistencies in the data, and reporting previously unpublished data. Based on the most specific data, at least 97 cyclocephaline beetle species have been reported from the flowers of 58 plant genera representing 17 families and 15 orders. Thirteen new cyclocephaline floral associations are reported herein. Six cyclocephaline and 25 plant synonyms were reported in the literature and on beetle voucher specimen labels, and these were updated to reflect current nomenclature. The valid names of three unavailable plant host names were identified. We review the cyclocephaline floral associations with respect to inferred relationships of angiosperm orders. Ten genera of cyclocephaline beetles have been recorded from flowers of early diverging angiosperm groups. In contrast, only one genus, Cyclocephala, has been recorded from dicot flowers. Cyclocephaline visitation of dicot flowers is limited to the New World, and it is unknown whether this is evolutionary meaningful or the result of sampling bias and incomplete data. The most important areas for future research include: (1) elucidating the factors that attract cyclocephalines to flowers including floral scent chemistry and thermogenesis, (2) determining whether cyclocephaline dicot visitation is truly limited to the New World, and (3) inferring evolutionary relationships within the Cyclocephalini to rigorously test vicarance hypotheses, host plant shifts, and mutualisms with angiosperms.
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Affiliation(s)
- Matthew Robert Moore
- Wichita State University, Department of Biological Sciences, 1845 Fairmount, Wichita, KS, USA 67260-0026
| | - Mary Liz Jameson
- Wichita State University, Department of Biological Sciences, 1845 Fairmount, Wichita, KS, USA 67260-0026
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Kaewwichian R, Yongmanitchai W, Kawasaki H, Wang PH, Yang SH, Limtong S. Yamadazyma siamensis sp. nov., Yamadazyma phyllophila sp. nov. and Yamadazyma paraphyllophila sp. nov., three novel yeast species isolated from phylloplane in Thailand and Taiwan. Antonie Van Leeuwenhoek 2013; 103:777-88. [PMID: 23208204 DOI: 10.1007/s10482-012-9860-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Four strains representing three novel anamorphic yeast species were isolated from the external surface of sugarcane leaves (DMKU-RK254(T)), corn leaves (DMKU-RK548(T)), bean leaves (K129) in Thailand and hengchun pencilwood leaves (TrB1-1(T)) in Taiwan. On the basis of morphological, biochemical, physiological and chemotaxonomic characteristics, the sequence analysis of the D1/D2 region of the large subunit (LSU) rRNA gene, the internal transcribed spacer (ITS) region, the actin gene (ACT1) and the elongation factor 2 gene (EF2), the four strains were determined to represent novel Yamadazyma species although formation of ascospores was not observed. Strain DMKU-RK254(T) was determined to be related to Candida diddensiae, Candida naeodendra and Candida kanchanaburiensis but with 1.8, 1.8 and 2.0 % nucleotide substitutions in the D1/D2 region of the LSU rRNA gene, respectively. It was assigned to Yamadazyma siamensis sp. nov. (type strain DMKU-RK254(T) = BCC 50730(T) = NBRC 108901(T) = CBS 12573(T)). The sequences of the D1/D2 region of the LSU rRNA gene, the ITS region, ACT1 gene and EF2 gene of two strains (DMKU-RK548(T) and K129) were identical but differed from that of strain TrB1-1(T) by 0.6, 1.0, 3.3 and 5.9 % nucleotide substitutions, respectively. Therefore, the two strains (DMKU-RK548(T) and K129) and strain TrB1-1(T) were assigned to be two separate species. The closest species in terms of pairwise sequences similarity of the D1/D2 region to the two novel species was Yamadazyma philogaea but with 1.1-1.7 % nucleotide substitutions. The two strains (DMKU-RK548(T) and K129) were assigned to Yamadazyma phyllophila sp. nov. (type strain DMKU-RK548(T) = BCC 50736(T) = NBRC 108906(T) = CBS 12572(T)) and the strain TrB1-1(T) was named Yamadazyma paraphyllophila sp. nov. (type strain TrB1-1(T) = BCRC 23030(T) = CCTCC AY 204005(T) = CBS 9928(T)).
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Oliveira RQ, Rosa CA, Uetanabaro APT, Azeredo A, Neto AG, Assis SA. Polygalacturonase secreted by yeasts from Brazilian semi-arid environments. Int J Food Sci Nutr 2009; 60 Suppl 7:72-80. [PMID: 19462328 DOI: 10.1080/09637480802534517] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Microbial pectinolytic enzymes are known to play a commercially important role in a number of industrial processes. The objective of this study was to investigate the extracellular polygalacturonases of yeasts isolated from Brazilian semi-arid environments. Among the 250 colonies tested, only 33 produced extracellular polygalacturonases: Aureobasidium pullulans (18 isolates), Candida boidinii (one isolate), Trichosporonoides sp. (three isolates), Kluyveromyces marxianus (one isolate), Cryptococcus liquefaciens (one isolate), Pseudozyma sp. (four isolates), and yeast-like related to fungal endophyte (five isolates). The highest activity of polygalacturonase was observed in Pseudozyma sp. CCMB 300 (14.17+/-0.08 micromol acid galacturonic released/min/mg protein). This study shows the potential of yeasts and yeast-like organisms isolated from Brazilian semi-arid environments to produce pectinolytic enzymes.
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Affiliation(s)
- Rodrigo Q Oliveira
- Laboratório de Enzimologia e Tecnologia das Fermentações, Departamento de Saúde, Universidade Estadual de Feira de Santana (UEFS), BA, Brazil
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Pagnocca FC, Rodrigues A, Nagamoto NS, Bacci M. Yeasts and filamentous fungi carried by the gynes of leaf-cutting ants. Antonie van Leeuwenhoek 2008; 94:517-26. [DOI: 10.1007/s10482-008-9268-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2008] [Accepted: 07/09/2008] [Indexed: 10/21/2022]
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Abstract
The yeast species found in necrotic stems of three columnar cacti (Pilosocereus machrisii, Pilosocereus vilaboensis, and Praecereus euchlorus)at eight localities in Brazil were described and a similarity analysis using Sorensen distances was used to compare the composition of yeast species at these localities. Of 56 necrotic cactus stems sampled,32 produced yeast colonies. Ten species of yeast or yeast-like microorganisms were identified from 53 isolates, with Pichia cactophila, Candida sonorensis, Geotrichum sp., and Sporopachydermia cereana being the most common. The remaining species occurred in low proportions in the cacti surveyed. The similarity analysis provided a dendogram (UPGMA) that clustered the yeast communities from different cactus species and indicated that host cactus species was unimportant in this clustering.
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Affiliation(s)
- M E Moraes
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, CEP 14049-900, Ribeirão Preto, SP, Brazil.
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Lachance MA, Starmer WT, Bowles JM, Phaff HJ, Rosa CA. Ribosomal DNA, species structure, and biogeography of the cactophilic yeast Clavispora opuntiae. Can J Microbiol 2000; 46:195-210. [PMID: 10749533 DOI: 10.1139/w99-130] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The ribosomal DNA of the cactophilic yeast species Clavispora opuntiae was studied in order to clarify the global distribution of the yeast. Over 500 strains, including isolates from several new localities worldwide, were characterized by rDNA restriction mapping. An unusual restriction pattern previously encountered only in one strain, from Conception Island in the Bahamas, was found in several Brazilian isolates. Sequences of the D1/D2 and D7/D8 divergent domains of the large subunit (LSU) and of the intergenic spacers (IGS) confirmed that these strains represent a genetically distinct variety of Clavispora opuntiae. This divergence had previously been hypothesized on the basis of reduced genetic recombination in inter-varietal crosses and the presence of a polymorphic ApaI restriction site located in the LSU. The exact position of the ApaI site in the D8 divergent domain and the nature of the variation that it reveals were determined. The complete sequences of 12 intergenic spacers clarified the significance of the species-wide variation uncovered by restriction mapping. Most of the polymorphic sites occur in the IGS1 and IGS2 regions, on either side of the 5S gene, and the variation is largely due to differences in the numbers and the sequences of internal repeats. Two other polymorphic sites are located in the external transcribed spacer (ETS) region. The reliability of various sites as indicators of overall spacer sequence divergence differed from one case to another. Variety-specific probes were devised and used to screen 120 strains for the presence of recombinant rDNA spacers. Three strains gave ambiguous results, but these did not constitute evidence that inter-varietal recombination has taken place in nature. The hypothesis that the global movement of Clavispora opuntiae has been influenced by the worldwide biological control of prickly pear with Cactoblastis cactorum, a moth of Argentinian origin, has received additional support from the demonstration that Argentinian strains have rDNAs similar to those found where the moth has been introduced. A dramatic founder effect was identified in a yeast population collected in cacti (Maui, Hawaii) in a site where the moth had been recently introduced.
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Affiliation(s)
- M A Lachance
- Department of Plant Sciences, University of Western Ontario, London, Canada.
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Abranches J, Vital MJS, Starmer WT, Mendonça-Hagler LC, Hagler AN. The yeast community and mycocin producers of guava fruit in Rio de Janeiro, Brazil. Mycologia 2000. [DOI: 10.1080/00275514.2000.12061125] [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: 10/26/2022]
Affiliation(s)
- Jacqueline Abranches
- Instituto de Microbiologia Prof. Paulo de Góes, Dept. Microbiologia Geral, Bl I, CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, RJ, 21941-590, Brazil and Biology Department, Syracuse University, Syracuse, New York, USA 13244-1270
| | - Marcos J. S. Vital
- Instituto de Microbiologia Prof. Paulo de Góes, Dept. Microbiologia Geral, Bl I, CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, RJ, 21941-590, Brazil and Departamento de Biologia, CCS, Campus do Paricarana, Universidade Federal de Roraima, Boa Vista, RR, Brazil
| | - William T. Starmer
- Biology Department, Syracuse University, Syracuse, New York, USA 13244-1270
| | - Leda C. Mendonça-Hagler
- Instituto de Microbiologia Prof. Paulo de Góes, Dept. Microbiologia Geral, Bl I, CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, RJ, 21941-590, Brazil
| | - Allen N. Hagler
- Instituto de Microbiologia Prof. Paulo de Góes, Dept. Microbiologia Geral, Bl I, CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, RJ, 21941-590, Brazil
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Abranches J, Valente P, Nóbrega HN, Fernandez FA, Mendonça-Hagler LC, Hagler AN. Yeast diversity and killer activity dispersed in fecal pellets from marsupials and rodents in a Brazilian tropical habitat mosaic. FEMS Microbiol Ecol 1998. [DOI: 10.1111/j.1574-6941.1998.tb01558.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Abranches J, Morais PB, Rosa CA, Mendonça-Hagler LC, Hagler AN. The incidence of killer activity and extracellular proteases in tropical yeast communities. Can J Microbiol 1997; 43:328-36. [PMID: 9115090 DOI: 10.1139/m97-046] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The presence of killer and proteolytic yeasts was studied among 944 isolates representing 105 species from tropical yeast communities. We found 13 killer toxin producing species, with Pichia kluyveri being the most frequent. Other killer yeast isolates were Candida apis, Candida bombicola, Candida fructus, Candida krusei, Candida sorbosa, Hanseniaspora uvarum, Issatchenkia occidentalis, Kloeckera apis, Kluyveromyces marxianus, Pichia membranaefaciens, Pichia ohmeri-like, and Sporobolomyces roseus. The communities from which killer yeasts were isolated had strains sensitive to them, and there were interspecific and intraspecific differences in the spectra of their killer activities. Pichia kluyveri had the broadest spectra of activity against sensitive isolates, and it apparently produced different toxins. The coexistence of sensitive and killer yeasts using the same substrate suggests that there is spatial separation in microhabitats or temporal separation in different stages of successions. Basidiomycetous yeasts were more frequently proteolytic than ascomycetous yeasts. Extracellular proteases could be important for the yeasts to have access to more nitrogen nutrients and obtain a better balance with available carbon sources.
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Affiliation(s)
- J Abranches
- Instituto de Microbiologia Prof. Paulo de Góes, Universidade Federal do Rio de Janeiro, Brazil
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