Biocontrol of Fusarium graminearum Growth and Deoxynivalenol Production in Wheat Kernels with Bacterial Antagonists

Cuijuan Shi, Peisheng Yan, Jiafei Li, Hanqi Wu, Qianwei Li and Shanshan Guan
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Cuijuan Shi: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
Peisheng Yan: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
Jiafei Li: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
Hanqi Wu: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
Qianwei Li: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
Shanshan Guan: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China

IJERPH, 2014, vol. 11, issue 1, 1-12

Abstract: Fusarium graminearum is the main causal pathogen affecting small-grain cereals, and it produces deoxynivalenol, a kind of mycotoxin, which displays a wide range of toxic effects in human and animals. Bacterial strains isolated from peanut shells were investigated for their activities against F. graminearum by dual-culture plate and tip-culture assays. Among them, twenty strains exhibited potent inhibition to the growth of F. graminearum , and the inhibition rates ranged from 41.41% to 54.55% in dual-culture plate assay and 92.70% to 100% in tip-culture assay. Furthermore, eighteen strains reduced the production of deoxynivalenol by 16.69% to 90.30% in the wheat kernels assay. Finally, the strains with the strongest inhibitory activity were identified by morphological, physiological, biochemical methods and also 16S rDNA and gyr A gene analysis as Bacillus amyloliquefaciens . The current study highlights the potential application of antagonistic microorganisms and their metabolites in the prevention of fungal growth and mycotoxin production in wheat kernels. As a biological strategy, it might avoid safety problems and nutrition loss which always caused by physical and chemical strategies.

Keywords: bacterial antagonists; biocontrol; deoxynivalenol; Fusarium graminearum; wheat kernels (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2014
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