Simultaneous degradation of aflatoxin B-1 and zearalenone by a microbial consortium

文献类型： 外文期刊

第一作者： Wang, Yi

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

作者机构：

关键词： Mycotoxins; Aflatoxin B-1; Zearalenone; Simultaneous degradation; Microbial consortium

期刊名称：TOXICON （ 影响因子：3.033； 五年影响因子：2.689 ）

ISSN： 0041-0101

年卷期： 2018 年 146 卷

页码：

收录情况： SCI

摘要： Mycotoxins are toxic secondary metabolites mainly produced by filamentous fungal species that commonly contaminate staple foods and feeds. They cause significant economic losses and greatly harm food security. Simultaneous contamination of multiple mycotoxins and the accompanying additive and synergistic effects may cause even more serious harm. To develop a microbial consortium with the ability to degrade multiple mycotoxins, a previously identified consortium with aflatoxin B-1 (AFB(1)) degradation ability, TADC7, was domesticated by co-culturing with 500 mu g l(-1) AFB(1) and 500 mu g l(-1) zearalenone (ZEA), yielding the derived microbial consortium TMDC. After 168 h of co-culture with TMDC, 2000 mu g l(-1) AFB(1) and 2000 mu g l(-1) ZEA were degraded by 98.9% and 88.5%, respectively. The proteins or enzymes in the TADC7 cell-free supernatant played a major role in mycotoxins degradation. The degradation ratios of 5000 mu g l(-1) AFB(1) and 5000 mu g l(-1) ZEA by 48 h TMDC cell-free supernatant were 93.8% and 90.3% at 72 h, respectively. Based on 16S rRNA sequencing, Geobacillus and Tepidimicrobium might play important roles in mycotoxin degradation by TMDC, and the TMDC community composition was stable, irrespective of mycotoxin. This study established the biodegradation of different categories of mycotoxins, and will facilitate the practical application of microbial consortia in mycotoxin degradation. (C) 2018 Elsevier Ltd. All rights reserved.

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