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Approach for quick exploration of highly effective broad-spectrum biocontrol strains based on PO8 protein inhibition

文献类型： 外文期刊

作者： Gu, Mei 1 ; Fu, Jiayun 1 ; Yan, Honglin 1 ; Yue, Xiaofeng 1 ; Zhao, Shancang 4 ; Zhang, Qi 1 ; Li, Peiwu 1 ;

作者机构： 1.Chinese Acad Agr Sci, Oil Crops Res Inst, Wuhan 430061, Peoples R China

2.Key Lab Biol & Genet Improvement Oil Crops, Wuhan 430061, Peoples R China

3.Hubei Hongshan Lab, Wuhan 430061, Peoples R China

4.Shandong Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Jinan 250100, Peoples R China

5.Hubei Univ, Inst Food Safety, Wuhan 430061, Peoples R China

6.Minist Agr & Rural Affairs, Wuhan 430061, Peoples R China

7.Key Lab Detect Mycotoxins, Wuhan 430061, Peoples R China

8.Xianghu Lab, Hangzhou 311231, Peoples R China

期刊名称：NPJ SCIENCE OF FOOD （ 影响因子：6.4； 五年影响因子：8.3 ）

ISSN：

年卷期： 2023 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Aflatoxin is a group of strongly toxic and carcinogenic mycotoxins produced by Aspergillus flavus and other Aspergillus species, which caused food contamination and food loss problems widely across the world especially in developing countries, thus threatening human health and sustainable development. So, it is important to develop new, green, and broad-spectrum biocontrol technology for the prevention of aflatoxin contamination sources. Previously, we found that the PO8 protein from aflatoxigenic A. flavus could be used as a biomarker to predict aflatoxin production in peanuts (so the PO8 is named as an early warning molecule), which infers that the PO8 is relative to aflatoxin production. Therefore, in the study, based on inhibiting the PO8, a new and quick strategy for screening aflatoxin biocontrol strains for developing control agents was presented. With the PO8 inhibition method, four biocontrol strains (2 strains were isolated from peanut kernels with sterilized surface and another 2 strains from peanut rhizosphere soil) were selected and combined to increase prevention wide-spectrum. As a result, the combination showed over 90% inhibition to all tested aflatoxigenic A. flavus isolated from three different peanut production areas (north, middle, and south areas of China), and better than any single strain. The field experiments located in five provinces of China showed that the practice prevention effects (inhibition of aflatoxigenic fungi on the surface of the peanuts) were from 50% to over 80%. The results indicated that the strategy of inhibiting the early warning molecule PO8 can be used to develop aflatoxin control agents well.

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