Biocontrol potential ofBacillus subtilisIBFCBF-4 againstFusariumwilt of watermelon

文献类型： 外文期刊

第一作者： Zhu, Jiuxiang

作者： Zhu, Jiuxiang;Yang, Xiebin;Li, Jilie;Zhu, Jiuxiang;Tan, Taimeng;Yang, Xiebin;Yu, Yongting;Gao, Chunsheng;Li, Zhimin;Yi, Cheng;Chen, Jia;Guo, Litao;Sun, Xiangping;Yan, Zhun;Zeng, Liangbin;Shen, Airong

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关键词： Bacillus subtilis; Antifungal activity; Biocontrol agent; Fusarium oxysporumf; sp; niveum

期刊名称：JOURNAL OF PLANT PATHOLOGY （ 影响因子：1.729； 五年影响因子：1.681 ）

ISSN： 1125-4653

年卷期： 2020 年 102 卷 2 期

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收录情况： SCI

摘要： Fusariumwilt of watermelon caused byFusarium oxysporumf. sp.niveum(FON) is a destructive soil-borne disease. The objective of this study was to screen antagonistic bacteria with potential applications for controlling this disease. Strain IBFCBF-4 with obvious antifungal activity against FON and seven other phytopathogens was successfully isolated from a rhizosphere soil. Based on the morphological, physiological, biochemical characteristics and 16S rDNA sequence analysis, IBFCBF-4 was identified asBacillus subtilis. Under greenhouse condition, IBFCBF-4 could significantly reduce the incidence ofFusariumwilt of watermelon by 51.1% compared to the control. The studies on the antagonistic mechanism showed that IBFCBF-4 could cause abnormal swelling and increased branching to the hyphae of FON. Meanwhile, the volatile and non-volatile compounds produced by IBFCBF-4 were able to suppress the mycelial growth of FON. Furthermore, PCR analysis confirmed the presence ofituA,ituB,ituC,ituD,bamD,bmyB,fenB,srfAB,surf,bacA,bacD,bacAB,tasA,mrsAandmrsMgenes involved in the biosynthesis of iturin A, bacillomycin, fengycin, surfactin, bacilysin, tasA and mersacidin, respectively. Taken together,B. subtilisIBFCBF-4 can be used as a potential biocontrol agent againstFusariumwilt of watermelon, but further work is required to improve its efficacy.

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