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Toxins 2017, 9(6), 184; doi:10.3390/toxins9060184

Screening of Deoxynivalenol Producing Strains and Elucidation of Possible Toxigenic Molecular Mechanism

1
School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
2
Zhen Jiang Grain and Oil Quality Testing Center, Zhenjiang 212013, Jiangsu, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jiujiang Yu
Received: 6 April 2017 / Revised: 24 May 2017 / Accepted: 27 May 2017 / Published: 1 June 2017
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Abstract

In this study, seven strains of Fusarium graminearum were isolated from wheat, of which six were identified to produce deoxynivalenol and the production of deoxynivalenol was assessed. F. graminearum strain Fg1 was noted to produce 1.0 μg/g deoxynivalenol during the incubation period in the Czapek yeast broth, while none was detected in F. graminearum strain Fg2. Hence, the differences in proteomes and transcriptomes of Fg1 and Fg2 were compared to analyze the mechanism underlying deoxynivalenol production. Among the 66 significantly differentially expressed proteins in Fg1, 39 and 27 were more or less abundant expressed. Functional analysis suggested that the enzymes involved in the methylerythritol 4-phosphate and mevalonate pathways, which provide a substrate for biosynthesis of farnesyl pyrophosphate, a precursor of DON, were activated in Fg1. The transcriptomics data demonstrated that the expression level of a majority of genes, including trichothecene biosynthetic genes, protein kinases, and transcription factors, involved in trichothecene biosynthesis was higher in Fg1 than in Fg2. The results also revealed differential expression profiles of deoxynivalenol biosynthesis genes in strains Fg1 and Fg2, which emphasized their deoxynivalenol producing ability and the underlying mechanism. View Full-Text
Keywords: deoxynivalenol; Fusarium graminearum; proteomics; transcriptomics deoxynivalenol; Fusarium graminearum; proteomics; transcriptomics
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Zheng, X.; Zhang, X.; Zhao, L.; Apaliya, M.T.; Yang, Q.; Sun, W.; Zhang, X.; Zhang, H. Screening of Deoxynivalenol Producing Strains and Elucidation of Possible Toxigenic Molecular Mechanism. Toxins 2017, 9, 184.

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