Streptomyces-Secreted Fluvirucin B6 as a Potential Bio-Fungicide for Managing Banana Fusarium Wilt and Mycotoxins and Modulating the Soil Microbial Community Structure
文献类型： 外文期刊
作者： Chen, Yufeng 1 ; Li, Xiaojuan 1 ; Zhou, Dengbo 1 ; Wei, Yongzan 1 ; Feng, Junting 1 ; Cai, Bingyu 1 ; Qi, Dengfeng 1 ; Zhang, Miaoyi 1 ; Zhao, Yankun 1 ; Li, Kai 1 ; Pan, Zhiqiang 2 ; Wang, Wei 1 ; Xie, Jianghui 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Natl Key Lab Trop Crop Breeding, Haikou 571101, Peoples R China
2.Univ Mississippi, ARS, Nat Prod Utilizat Res Unit, USDA, University, MS 38677 USA
关键词： secondary metabolite; fluvirucin B6; Fusarium oxysporum; mycotoxins; rhizospheremicrobial community
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.7； 五年影响因子：6.0 ）
ISSN： 0021-8561
年卷期： 2024 年 72 卷 32 期
页码：
收录情况： SCI
摘要： Banana Fusarium wilt caused by Fusarium oxysporum f. sp. cubense (Foc TR4) is the most destructive soil-borne fungal disease. Until now, there has been a lack of effective measures to control the disease. It is urgent to explore biocontrol agents to control Foc TR4 and the secretion of mycotoxin. In this study, fluvirucin B6 was screened from Streptomyces solisilvae using an activity-guided method. Fluvirucin B6 exhibited strong antifungal activity against Foc TR4 (0.084 mM of EC50 value) and significantly inhibited mycelial growth and spore germination. Further studies demonstrated that fluvirucin B6 could cause the functional loss of mitochondria, the disorder of metabolism of Foc TR4 cells, and the decrease of enzyme activities in the tricarboxylic acid cycle and electron transport chain, ultimately inhibiting mycotoxin metabolism. In a pot experiment, the application of fluvirucin B6 significantly decreased the incidence of banana Fusarium wilt and the amount of Foc TR4 and controlled fungal toxins in the soil. Additionally, fluvirucin B6 could positively regulate the changes in the structure of the banana rhizosphere microbial community, significantly enriching beneficial microbes associated with disease resistance. In summary, this study identifies fluvirucin B6, which plays versatile roles in managing fungal diseases and mycotoxins.
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