Isolation and characterization of Bacillus amyloliquefaciens ZDS-1: Exploring the degradation of Zearalenone by Bacillus spp.

文献类型： 外文期刊

第一作者： Xu, Jianhong

作者： Xu, Jianhong;Wang, Hongjie;Zhu, Ziwei;Ji, Fang;Yin, Xianchao;Shi, Jianrong;Zhu, Ziwei;Hong, Qing

作者机构：

关键词： Mycotoxin;Zearalenone;Biodegradation;Bacillus amyloliquefaciens

期刊名称：FOOD CONTROL （ 影响因子：5.548； 五年影响因子：5.498 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Zearalenone (ZEN) is a mycotoxin produced mainly by various Fusarium species which occur naturally in many crops worldwide. ZEN causes reproductive disorders and hyperestrogenic syndromes in animals and humans. This study aimed to isolate ZEN-degrading bacteria to develop strategies for detoxifying ZEN contamination in cereal crops. We screened approximately 1000 colonies for degrading ability and found four strains were capable of degrading ZEN. We selected one strain ZDS-1 for further study because it showed the high ZEN-degrading ability. On the basis of morphological, physiological and phylogenetic analysis of its 16SrRNA, gyrA gene sequences, strain ZDS-1 was identified as Bacillus amyloliquefaciens. The optimal conditions for the biodegradation of ZEN by ZDS-1 were temperature; 30 degrees C, pH; 6.0-7.0, and cell concentration; 5 x 10(8) cfu/mL. ZDS-1 could degrade ZEN efficiently with the concentration from 1 mg/L to 100 mg/L. ZDS-1 not only could remove ZEN in the culture medium, but also could degrade ZEN in wheat. The ZEN removal by ZDS-1 was not due to binding or absorption, and during the process of ZEN degradation, no ZEN derivatives of ZEN were produced. These results suggested that Bacillus amyloliquefaciens ZDS-1 would be explored further for its ability to degrade ZEN in field trials. (c) 2016 Elsevier Ltd. All rights reserved.

分类号： TS2

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