Toxigenic potential of Fusarium graminearum isolated from maize of northwest Argentina

Braz J Microbiol. 2013 Oct 30;44(2):417-22. doi: 10.1590/S1517-83822013000200011. eCollection 2013.


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.

Keywords: Fusarium graminearum; chemotypes; maize; trichothecenes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Argentina
  • Fusarium / growth & development
  • Fusarium / isolation & purification*
  • Fusarium / metabolism*
  • Oryza / microbiology
  • Trichothecenes / metabolism*
  • Zea mays / microbiology*


  • Trichothecenes