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Soybean Sudden Death Syndrome Causal Agent Fusarium brasiliense Present in Michigan.
Wang, Jie; Sang, Hyunkyu; Jacobs, Janette L; Oudman, Kjersten A; Hanson, Linda E; Chilvers, Martin I.
Affiliation
  • Wang J; 1 Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824; and.
  • Sang H; 1 Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824; and.
  • Jacobs JL; 1 Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824; and.
  • Oudman KA; 1 Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824; and.
  • Hanson LE; 1 Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824; and.
  • Chilvers MI; 2 Sugar Beet and Bean Research Unit, U.S. Department of Agriculture Agricultural Research Service, Michigan State University, East Lansing, MI 48824.
Plant Dis ; 103(6): 1234-1243, 2019 Jun.
Article in En | MEDLINE | ID: mdl-30932735
ABSTRACT
Sudden death syndrome (SDS), caused by members of Fusarium solani species complex (FSSC) clade 2, is a major and economically important disease in soybean worldwide. The primary causal agent of SDS isolated to date in North America has been F. virguliforme. In 2014 and 2016, SDS symptoms were found in two soybean fields located on the same farm in Michigan. Seventy Fusarium strains were isolated from roots of the SDS-symptomatic soybeans in two fields. Phylogenetic analysis of partial sequences of elongation factor-1α, the nuclear ribosomal DNA intergenic spacer region, and the RNA polymerase II beta subunit revealed that the primary FSSC species isolated was F. brasiliense (58 and 36% in each field) and the remaining Fusarium strains were identified as F. cuneirostrum, F. phaseoli, an undescribed Fusarium sp. from FSSC clade 2, and strains in FSSC clade 5 and FSSC clade 11. Molecular identification was supported with morphological analysis and a pathogenicity assay. The soybean seedling pathogenicity assay indicated that F. brasiliense was capable of causing typical foliar SDS symptoms. Both root rot and foliar disease severity were variable by strain, just as they are in F. virguliforme. Both FSSC 5 and FSSC 11 strains were also capable of causing root rot, but SDS foliar symptoms were not detected. To our knowledge, this is the first report of F. brasiliense causing SDS in soybean in the United States and the first report of F. cuneirostrum, F. phaseoli, an as-yet-unnamed Fusarium sp., and strains in FSSC clade 5 and FSSC clade 11 associated with or causing root rot of soybean in Michigan.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Glycine max / Fusarium Type of study: Prognostic_studies Country/Region as subject: America do norte / America do sul / Brasil Language: En Journal: Plant Dis Year: 2019 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Glycine max / Fusarium Type of study: Prognostic_studies Country/Region as subject: America do norte / America do sul / Brasil Language: En Journal: Plant Dis Year: 2019 Document type: Article