Investigation of Pseudomonas fluorescens strain 3JW1 on preventing and reducing aflatoxin contaminations in peanuts

文献类型： 外文期刊

第一作者： Yang, Xiaona

作者： Yang, Xiaona;Liu, Hongxia;Yang, Xiaona;Liu, Hongxia;Zhang, Qi;Li, Peiwu;Zhang, Qi;Li, Peiwu;Zhang, Qi;Li, Peiwu;Zhang, Qi;Li, Peiwu;Chen, Zhi-Yuan

作者机构：

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2017 年 12 卷 6 期

页码：

收录情况： SCI

摘要： Pseudomonas fluorescens strain 3JW1, which has a broad-spectrum antimicrobial activity, was studied to investigate whether it affects the amounts of aflatoxin B-1 (AFB(1)) produced by Aspergillus flavus. It was found that the bacterium reduced the amounts of AFB(1) in potato dextrose broth (PDB) and peanut medium by 97.8% and 99.4%, respectively. It also reduced AFB(1) by similar to 183 mu g/kg (55.8%) when applied onto peanut kernels. This strain reduced AFB(1) via three mechanisms. First, it significantly inhibited A. flavus growth; second, our data showed that strain 3JW1 inhibits aflatoxin biosynthesis by A. flavus; and third, P. fluorescens strain 3JW1 is capable of degrading AFB(1) at a rate as high as 88.3% in 96 hours. This is the first report demonstrating that Pseudomonas fluorescens can reduce toxin contamination caused by A. flavus on peanut kernels. Our findings indicate that P. fluorescens strain 3JW1 had multiple effects including reducing A. flavus infection and aflatoxin contamination. And the results also highlight the potential applications of the strain 3JW1 for the biological control of aflatoxin contamination in peanuts and other susceptible crops.

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