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Abdellatif L, Fernandez MR, Lokuruge P. Mode of action of potential biocontrol agents against Fusarium species and Cochliobolus sativus. Mycologia 2022; 114:476-486. [PMID: 35583987 DOI: 10.1080/00275514.2022.2051986] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The antagonistic activities of three potential biocontrol agents (BCAs), Clonostachys miodochialis, C. rosea, and Minimedusa polyspora, were tested in vitro against the target fungi Fusarium acuminatum, F. avenaceum, F. equiseti, F. graminearum, and Cochliobolus sativus. In vitro dual-culture assay revealed that the BCAs were able to inhibit the mycelial growth of most of the target fungi, with the most common mode of action being mycoparasitism. After 5 d of incubation, depending on the host-parasite interface, biotrophic mycoparasitism was observed via attachment structures on F. avenaceum, F. equiseti, and C. sativus. Haustoria and appressoria were formed by C. miodochialis and M. polyspora on F. avenaceum and C. sativus, respectively. Clamp-like structures were also produced by both BCAs, depending on the host fungus. Clonostachys rosea formed only contact points on its hosts. Coiling structure was observed with C. rosea and M. polyspora occasionally in pure culture but more abundantly in the dual-culture assay. After an additional 3 to 5 d of incubation, the BCAs started damaging their host cells. Asexual fruiting bodies of the BCAs spread necrotrophically on F. acuminatum and F. graminearum and began destroying their mycelia after the initial 5 d of incubation. Furthermore, mycelial dissolution of F. acuminatum by an excreted substance was observed at a distance before direct contact with C. miodochialis. The diffuse metabolite assay revealed that the highest inhibition of the three BCAs was on C. sativus and their least effectiveness was observed on F. graminearum. Overall, these results provide evidence that C. miodochialis, C. rosea, and M. polyspora are potential candidates for biological control of the tested target fungi. This constitutes the first report that these three BCAs are able to establish an initial biotrophic relationship followed by a necrotrophic lifestyle. In addition, C. miodochialis has not previously been reported as a BCA.
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Affiliation(s)
- Lobna Abdellatif
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Box 1030, Swift Current, Saskatchewan S9H 3X2, Canada
| | - Myriam R Fernandez
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Box 1030, Swift Current, Saskatchewan S9H 3X2, Canada
| | - Prabhath Lokuruge
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Box 1030, Swift Current, Saskatchewan S9H 3X2, Canada
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Sari E, Knox RE, Ruan Y, Henriquez MA, Kumar S, Burt AJ, Cuthbert RD, Konkin DJ, Walkowiak S, Campbell HL, Singh AK, Ross J, Lokuruge P, Hsueh E, Boyle K, Sidebottom C, Condie J, Yates S, Pozniak CJ, Fobert PR. Historic recombination in a durum wheat breeding panel enables high-resolution mapping of Fusarium head blight resistance quantitative trait loci. Sci Rep 2020; 10:7567. [PMID: 32372012 PMCID: PMC7200731 DOI: 10.1038/s41598-020-64399-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/15/2020] [Indexed: 11/09/2022] Open
Abstract
The durum wheat line DT696 is a source of moderate Fusarium head blight (FHB) resistance. Previous analysis using a bi-parental population identified two FHB resistance quantitative trait loci (QTL) on chromosome 5A: 5A1 was co-located with a plant height QTL, and 5A2 with a major maturity QTL. A Genome-Wide Association Study (GWAS) of DT696 derivative lines from 72 crosses based on multi-environment FHB resistance, plant height, and maturity phenotypic data was conducted to improve the mapping resolution and further elucidate the genetic relationship of height and maturity with FHB resistance. The Global Tetraploid Wheat Collection (GTWC) was exploited to identify durum wheat lines with DT696 allele and additional recombination events. The 5A2 QTL was confirmed in the derivatives, suggesting the expression stability of the 5A2 QTL in various genetic backgrounds. The GWAS led to an improved mapping resolution rendering the 5A2 interval 10 Mbp shorter than the bi-parental QTL mapping interval. Haplotype analysis using SNPs within the 5A2 QTL applied to the GTWC identified novel haplotypes and recombination breakpoints, which could be exploited for further improvement of the mapping resolution. This study suggested that GWAS of derivative breeding lines is a credible strategy for improving mapping resolution.
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Affiliation(s)
- Ehsan Sari
- Aquatic and Crop Resource Development Centre, National Research Council, Saskatoon, SK, Canada.,Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Ron E Knox
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada.
| | - Yuefeng Ruan
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada.
| | - Maria Antonia Henriquez
- Morden Research and Development Centre, Agriculture and Agri-Food Canada, Morden, MB, Canada
| | - Santosh Kumar
- Brandon Research and Development Centre, Agriculture and Agri-Food Canada, Brandon, MB, Canada
| | - Andrew J Burt
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada
| | - Richard D Cuthbert
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada
| | - David J Konkin
- Aquatic and Crop Resource Development Centre, National Research Council, Saskatoon, SK, Canada
| | - Sean Walkowiak
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada.,Canadian Grain Commission, Winnipeg, MB, Canada
| | - Heather L Campbell
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada
| | - Asheesh K Singh
- Department of Agronomy, Iowa State University, Ames, Iowa, United States of America
| | - Jay Ross
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada
| | - Prabhath Lokuruge
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada
| | - Emma Hsueh
- Aquatic and Crop Resource Development Centre, National Research Council, Saskatoon, SK, Canada
| | - Kerry Boyle
- Aquatic and Crop Resource Development Centre, National Research Council, Saskatoon, SK, Canada
| | - Christine Sidebottom
- Aquatic and Crop Resource Development Centre, National Research Council, Saskatoon, SK, Canada
| | - Janet Condie
- Aquatic and Crop Resource Development Centre, National Research Council, Saskatoon, SK, Canada
| | - Shawn Yates
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada
| | - Curtis J Pozniak
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Pierre R Fobert
- Aquatic and Crop Resource Development Centre, National Research Council, Ottawa, ON, Canada
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Abdellatif L, Lokuruge P, Hamel C. Axenic growth of the arbuscular mycorrhizal fungus Rhizophagus irregularis and growth stimulation by coculture with plant growth-promoting rhizobacteria. Mycorrhiza 2019; 29:591-598. [PMID: 31760478 DOI: 10.1007/s00572-019-00924-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 08/26/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi are ecologically important for the growth and survival of most vascular plants. These fungi are known as obligate biotrophs that acquire carbon solely from host plants. A 13C-labeling experiment revealed the ability of axenically grown Rhizophagus irregularis DAOM 197198 to derive carbon from axenic culture on a relatively novel medium containing two sources of palmitic acid developed by Ishii (designated IH medium). In a separate experiment, this model fungus grew larger mycelia and produced more daughter spores on the IH medium in the presence of two Variovorax paradoxus strains than in axenic culture. In contrast, a strain of Mycobacterium sp. did not influence the growth of the AM fungus. Rhizophagus irregularis produced branched absorbing structures on the IH medium and, in monoxenic culture with V. paradoxus, sometimes formed densely packed hyphal coils. In this study, we report for the first time the formation of coarse terminal pelotons and of terminal and intercalary very fine (≈ 1 μm diameter) hyphal elongations, which could form daughter spores in the presence of V. paradoxus. This study shows the value of IH medium and certain rhizobacteria in the culture of R. irregularis DAOM 197198 in vitro.
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Affiliation(s)
- Lobna Abdellatif
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, Saskatchewan, Canada.
| | - Prabhath Lokuruge
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, Saskatchewan, Canada
| | - Chantal Hamel
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, Saskatchewan, Canada
- Quebec Research and Development Centre, Agriculture and Agri-Food Canada, Quebec City, Quebec, Canada
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Sari E, Berraies S, Knox RE, Singh AK, Ruan Y, Cuthbert RD, Pozniak CJ, Henriquez MA, Kumar S, Burt AJ, N’Diaye A, Konkin DJ, Cabral AL, Campbell HL, Wiebe K, Condie J, Lokuruge P, Meyer B, Fedak G, Clarke FR, Clarke JM, Somers DJ, Fobert PR. High density genetic mapping of Fusarium head blight resistance QTL in tetraploid wheat. PLoS One 2018; 13:e0204362. [PMID: 30307951 PMCID: PMC6181299 DOI: 10.1371/journal.pone.0204362] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 05/02/2018] [Accepted: 09/05/2018] [Indexed: 11/19/2022] Open
Abstract
Breeding for Fusarium head blight (FHB) resistance in durum wheat is complicated by the quantitative trait expression and narrow genetic diversity of available resources. High-density mapping of the FHB resistance quantitative trait loci (QTL), evaluation of their co-localization with plant height and maturity QTL and the interaction among the identified QTL are the objectives of this study. Two doubled haploid (DH) populations, one developed from crosses between Triticum turgidum ssp. durum lines DT707 and DT696 and the other between T. turgidum ssp. durum cv. Strongfield and T. turgidum ssp. carthlicum cv. Blackbird were genotyped using the 90K Infinium iSelect chip and evaluated phenotypically at multiple field FHB nurseries over years. A moderate broad-sense heritability indicated a genotype-by-environment interaction for the expression of FHB resistance in both populations. Resistance QTL were identified for the DT707 × DT696 population on chromosomes 1B, 2B, 5A (two loci) and 7A and for the Strongfield × Blackbird population on chromosomes 1A, 2A, 2B, 3A, 6A, 6B and 7B with the QTL on chromosome 1A and those on chromosome 5A being more consistently expressed over environments. FHB resistance co-located with plant height and maturity QTL on chromosome 5A and with a maturity QTL on chromosome 7A for the DT707 × DT696 population. Resistance also co-located with plant height QTL on chromosomes 2A and 3A and with maturity QTL on chromosomes 1A and 7B for the Strongfield × Blackbird population. Additive × additive interactions were identified, for example between the two FHB resistance QTL on chromosome 5A for the DT707 × DT696 population and the FHB resistance QTL on chromosomes 1A and 7B for the Strongfield × Blackbird population. Application of the Single Nucleotide Polymorphic (SNP) markers associated with FHB resistance QTL identified in this study will accelerate combining genes from the two populations.
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Affiliation(s)
- Ehsan Sari
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
- Aquatic and Crop Resource Development Centre, National Research Council Canada, Saskatoon, Canada
| | - Samia Berraies
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - Ron E. Knox
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - Asheesh K. Singh
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - Yuefeng Ruan
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - Richard D. Cuthbert
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - Curtis J. Pozniak
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Maria Antonia Henriquez
- Morden Research and Development Centre, Agriculture and Agri-Food Canada, Morden, MB, Canada
| | - Santosh Kumar
- Brandon Research and Development Centre, Agriculture and Agri-Food Canada, Brandon, MB, Canada
| | - Andrew J. Burt
- Brandon Research and Development Centre, Agriculture and Agri-Food Canada, Brandon, MB, Canada
| | - Amidou N’Diaye
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, Canada
| | - David J. Konkin
- Aquatic and Crop Resource Development Centre, National Research Council Canada, Saskatoon, Canada
| | - Adrian L. Cabral
- Aquatic and Crop Resource Development Centre, National Research Council Canada, Saskatoon, Canada
| | - Heather L. Campbell
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - Krystalee Wiebe
- Morden Research and Development Centre, Agriculture and Agri-Food Canada, Morden, MB, Canada
| | - Janet Condie
- Aquatic and Crop Resource Development Centre, National Research Council Canada, Saskatoon, Canada
| | - Prabhath Lokuruge
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
- Aquatic and Crop Resource Development Centre, National Research Council Canada, Saskatoon, Canada
| | - Brad Meyer
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - George Fedak
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada
| | - Fran R. Clarke
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - John M. Clarke
- Agriculture and Agri-Food Canada, Swift Current Research and Development Centre, Swift Current, Canada
| | - Daryl J. Somers
- Vineland Research and Innovation Centre, Vineland, ON, Canada
| | - Pierre R. Fobert
- Aquatic and Crop Resource Development Centre, National Research Council Canada, Saskatoon, Canada
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