Fifty 12,13-epoxytrichothecenes have been reported in the literature; of these diacetoxyscirpenol, T-2 toxin, nivalenol and vomitoxin have been naturally occurring in cereal grains throughout the world. Vomitoxin is produced in ears of corn prior to harvest when wet, cool weather precedes which favours Gibberella zeae growth. This type of infected corn, which often contains vomitoxin, is associ...

Record low growing degree days and suboptimal growing conditions for corn in 2009 significantly delayed corn dry down and harvest in much of Wisconsin. As a result, near optimal environmental conditions (frost before full maturity) were present in the fall of 2009 for field mold growth. Field molds indentified on corn in the fall of 2009 by the University of Wisconsin Department of Plant Pathol...

Cch1, a putative voltage-gated calcium ion channel, was investigated for its role in ascus development in Gibberella zeae. Gene replacement mutants of CCH1 were generated and found to have asci which did not forcibly discharge spores, although morphologically ascus and ascospore development in the majority of asci appeared normal. Additionally, mycelial growth was significantly slower, and sexu...

Connections between fungal development and secondary metabolism have been reported previously, but as yet, no comprehensive analysis of a family of secondary metabolites and their possible role in fungal development has been reported. In the present study, mutant strains of the heterothallic ascomycete Cochliobolus heterostrophus, each lacking one of 12 genes (NPS1 to NPS12) encoding a nonribos...

Gibberella zeae, a major cause of cereal scab, can be divided into two chemotypes based on production of the 8-ketotrichothecenes deoxynivalenol (DON) and nivalenol (NIV). We cloned and sequenced a Tri13 homolog from each chemotype. The Tri13 from a NIV chemotype strain (88-1) is located in the trichothecene gene cluster and carries an open reading frame similar to that of Fusarium sporotrichio...

Using the classical emulsified system and the monomolecular film technique, the substrate specificity of recombinant Gibberella zeae lipase (rGZEL) that originates from Gibberella zeae was characterized in detail. Under the emulsified reaction system, both phospholipase and glycolipid hydrolytic activities were observed, except for the predominant lipase activity. The optimum conditions for dif...

(*) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days. This patent is subject to a terminal dis claimer. 323–326. " N. I. Khan et al., " Developing strategies and organisms for biocontrol of head scab of wheat " , Phytopathology 88:S47 (1998). Performance of selected antagonists of Fusarium head blight against a range of Gibberel...