Journal
FEBS LETTERS
Volume 581, Issue 3, Pages 443-447Publisher
WILEY
DOI: 10.1016/j.febslet.2007.01.003
Keywords
deoxynivalenol; oxidative stress; Tri genes; catalase; H2O2
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Effect of exogenous H2O2 and catalase was tested in liquid cultures of the deoxynivalenol and 15-acetyideoxynivalenol-producing fungus Fusarium graminearum. Accordingly to previous results, H2O2 supplementation of the culture medium leads to increased toxin production. This study indicates that this event seems to be linked to a general up regulation of genes involved in the deoxynivalenol and 15-acetyldeoxynivalenol biosynthesis pathway, commonly named Tri genes. In catalase-treated cultures, toxin accumulation is reduced, and Tri genes expression is significantly down regulated. Furthermore, kinetics of expression of several Tri genes is proposed in relation to toxin accumulation. Biological meanings of these findings are discussed. (c) 2007 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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