INVESTIGADORES
CHULZE Sofia Noemi
congresos y reuniones científicas
Título:
Fusarium graminearum species complex populations from South America toxigenic profiles and biocontrol possibilities
Autor/es:
CHULZE, S.N
Lugar:
Winnipeg
Reunión:
Congreso; Canadian Workshop on Fusarium Head Blight ( 7th CWFHB); 2011
Institución organizadora:
Agriculture and Agri-Food Canada
Resumen:
Fusarium head blight (FHB) is a re-emergent disease for wheat worldwide. The main pathogens associated with FHB are included in the Fusarium graminearum species complex which encompasses at least 13 phylogenetic species. The disease results in important yield losses and also possible contamination with mycotoxins, of particular concern B type trichothecenes such as deoxynivalenol and nivalenol which render harvested grains and its by-products unsuitable for human and animal consumption. The studies on Fusarium graminearum species complex associated with FHB in Argentina, Brazil and Uruguay showed that F. graminearum sensu stricto (lineage 7) was the main species isolated in Argentina and Uruguay. Most of the strains have a   DON/15 Acetyl-DON genotype/chemotype, but few strains showed   DON/NIV genotype and produced DON when analyzed chemically. Ninety three percent of the strains isolated from wheat in Brazil were Fusarium graminearum sensu stricto (lineage 7) and 7% were F. meridionale (linage 2). F.graminearum sensu stricto produced DON/15 acetyl DON while F.meridionale were NIV producers. The data evidence the dominance of F. graminearum sensu stricto causing FHB in South America. Some potential biocontrol agents to control FHB and deoxynivalenol accumulation have been selected and its effectiveness both under in vitro and greenhouse trials have been demonstrated