Artículos de revistas
Toxigenic potential of Fusarium graminearum isolated from maize of northwest Argentina
Fecha
2013-09Registro en:
Sampietro, Diego Alejandro; Apud, Gisselle Raquel; Belizán, María Melina Eleonora; Vattuone, Marta Amelia; Catalan, Cesar Atilio Nazareno; Toxigenic potential of Fusarium graminearum isolated from maize of northwest Argentina; Soc Brasileira Microbiologia; Brazilian Journal Of Microbiology; 44; 2; 9-2013; 417-422
1517-8382
1678-4405
Autor
Sampietro, Diego Alejandro
Apud, Gisselle Raquel
Belizán, María Melina Eleonora
Vattuone, Marta Amelia
Catalan, Cesar Atilio Nazareno
Resumen
Twenty six isolates of Fusarium graminearum from grains of maize hybrids harvested in ±west Argentina were grown on autoclaved rice grain to assess their ability to produce type B trichothecenes. Chemical analysis indicated that 38% of isolates were nivalenol (NIV) producers only, 31% were major NIV producers with high DON(deoxynivalenol)/NIV ratios, 8% were major DON producers with minor NIV production, and 23% were DON producers only. Isolates showed a high variability in their toxigenic potential which was not related to fungal biomass. The distribution of the different chemotypes as well as the high and the low trichothecene-producing Fusarium isolates could not be associated to a geographical origin. Our results confirmed for the first time that isolates of Fusarium graminearum from maize of northwest Argentina are able to produce DON and NIV. A substancial contamination with both NIV and DON is likely in maize from northwest Argentina. Their contents should be quantified in regional surveillances for mycotoxin contamination.