Toxigenic potential of Fusarium graminearum isolated from maize of northwest Argentina
Braz. j. microbiol
; 44(2): 417-422, 2013. graf, mapas, tab
Article
in En
| LILACS
| ID: lil-688579
Responsible library:
BR1.1
ABSTRACT
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.
Key words
Full text:
1
Index:
LILACS
Main subject:
Trichothecenes
/
Zea mays
/
Fusarium
Country/Region as subject:
America do sul
/
Argentina
Language:
En
Journal:
Braz. j. microbiol
Journal subject:
MICROBIOLOGIA
Year:
2013
Type:
Article