FvVE1 regulates biosynthesis of the mycotoxins fumonisins and fusarins in Fusarium verticillioides

J Agric Food Chem. 2009 Jun 10;57(11):5089-94. doi: 10.1021/jf900783u.

Abstract

The veA gene positively regulates sterigmatocystin production in Aspergillus nidulans and aflatoxin production in Aspergillus parasiticus and Aspergillus flavus . Whether veA homologues have a role in regulating secondary metabolism in other fungal genera is unknown. In this study, we examined the role of the veA homologue, FvVE1, on the production of two mycotoxin families, fumonisins and fusarins, in the important corn pathogen Fusarium verticillioides . We found that FvVE1 deletion completely suppressed fumonisin production on two natural substrates, corn and rice. Furthermore, our results revealed that FvVE1 is necessary for the expression of the pathway-specific regulatory gene FUM21 and structural genes in the fumonisin biosynthetic gene (FUM) cluster. FvVE1 deletion also blocked production of fusarins. The effects of FvVE1 deletion on the production of these toxins were found to be the same in two separate mating types. Our results strongly suggest that FvVE1 plays an important role in regulating mycotoxin production in F. verticillioides .

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Fumonisins / metabolism*
  • Fungal Proteins / genetics
  • Fungal Proteins / metabolism*
  • Fusarium / genetics*
  • Fusarium / metabolism*
  • Gene Expression Regulation, Fungal*
  • Mycotoxins / biosynthesis*
  • Mycotoxins / genetics

Substances

  • Fumonisins
  • Fungal Proteins
  • Mycotoxins