Microbial Degradation of Zearalenone by a Novel Microbial Consortium, NZDC-6, and Its Application on Contaminated Corncob by Semisolid Fermentation

文献类型： 外文期刊

第一作者： Wang, Yi

作者： Wang, Yi;Zhao, Chunxia;Zhao, Mingming;Peng, Maomin;Guo, Peng;Wang, Yi;Zhao, Chunxia;Zhao, Mingming;Peng, Maomin;Guo, Peng;Zhang, Dongdong;Cui, Zongjun

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关键词： zearalenone; biodegradation; 16S rRNA microbial characterization; environmental parameters; RDA analysis

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2020 年 68 卷 6 期

页码：

收录情况： SCI

摘要： A novel microbial consortium (NZDC-6) was screened and characterized to detoxify the estrogenic mycotoxin zearalenone (ZEA), which commonly contaminates maize and is a major threat to food and health security. We found NZDC-6 to be thermophilic and highly effective, with a 90.3% ZEA degradation ratio at an optimum temperature of 60 degrees C. NZDC-6 was also effective at degrading the more estrogenic ZEA cognates, alpha-zearalenol (alpha-ZAL) and beta-zearalenol (beta-ZAL), with >90% degradation ratios. To evaluate a practical application, ZEA-contaminated corncobs were treated with NZDC-6 via semisolid fermentation. Measurements of physicochemical parameters and 16S microbial diversity and redundancy analysis (RDA) indicated that ZEA removal was most efficient at a low corncob solid content (< 5%), as a high solid content overwhelmed the microbial metabolic load, leading to increased dissolved oxygen and lowered pH. Our results demonstrate that the control of environmental variables is crucial for effective ZEA microbial removal in practical applications.

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