A microbial ecosystem: agricultural Jiaosu achieves effective and lasting antifungal activity against Botrytis cinerea
文献类型： 外文期刊
作者： Zhang, Yue 1 ; Gao, Youhui 1 ; Zheng, Zehui 1 ; Meng, Xingyao 2 ; Cai, Yafan 3 ; Liu, Jianbin 4 ; Hu, Yuegao 1 ; Yan, Shu 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China
2.Beijing Technol & Business Univ, Beijing 100048, Peoples R China
3.Deutsch Biomassforschungszentrum Gemeinnutziges G, Dept Biochem Convers, Torgauer Str 116, D-04347 Leipzig, Germany
4.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing 100097, Peoples R China
5.Shanxi Agr Univ, Coll Resource & Environm Sci, Taigu 030801, Shanxi, Peoples R China
关键词： Agricultural Jiaosu; Antifungal activity; Biological agent; Synergistic effects; Botrytis cinerea
期刊名称：AMB EXPRESS （ 影响因子：3.298； 五年影响因子：3.427 ）
ISSN： 2191-0855
年卷期： 2020 年 10 卷 1 期
页码：
收录情况： SCI
摘要： Synthetic fungicides are eco-unfriendly to agriculture and the environment. Agricultural Jiaosu (AJ), which originates from organic wastes, has the potential to be a substitute for synthetic fungicides. In this study, the characteristics of AJ and its antifungal activity against Botrytis cinerea were investigated for the first time. AJ was rich in lactic acid (4.46 g/L), acetic acid (1.52 g/L), Lactobacillus (72.45%) and Acetobacter (15.23%), which was a microbial ecosystem consisting of acid-based substances (AS) and beneficial microorganisms (BM). The results of the antifungal assays suggested that B. cinerea was effectively inhibited by AJ, with the half-maximal inhibitory concentration (IC50) of 9.24%. AJ showed the strongest and most-lasting inhibitory effect compared to cell-free supernatant and microbial solution of AJ, indicating that AS and BM and their synergistic effect contributed to the antifungal activity of AJ. Two-step inhibition' is an antifungal mode of AJ. Firstly, AS not only inhibited the pathogen directly but also provided a dominant niche for BM of AJ. Then, BM in AJ, especially Acetobacter, proliferated and metabolized acetic acid continuously. Thus, AJ achieved high-efficiency and long-acting inhibition. AJ is a promising biological agent considering its features of an eco-friendly, low-cost and easy-to-operate biological agent in rural areas.
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