Isolation and characterization of antagonistic Paenibacillus polymyxa HX-140 and its biocontrol potential against Fusarium wilt of cucumber seedlings

文献类型： 外文期刊

第一作者： Zhai, Yang

作者： Zhai, Yang;Zhu, Jiu-xiang;Tan, Tai-meng;Xu, Jian-ping;Yang, Xie-bin;Zeng, Liang-bin;Zhu, Jiu-xiang;Tan, Tai-meng;Shen, Ai-rong;Yang, Xie-bin;Li, Ji-lie;Shen, Ai-rong;Wei, Lin

作者机构：

关键词： Fusarium wilt; Cucumber; Paenibacillus polymyxa; Antagonistic bacterium; Biocontrol mechanism

期刊名称：BMC MICROBIOLOGY （ 影响因子：3.605； 五年影响因子：4.283 ）

ISSN： 1471-2180

年卷期： 2021 年 21 卷 1 期

页码：

收录情况： SCI

摘要： Objective The aim of this study is to evaluate the efficacy of the strain Paenibacillus polymyxa HX-140, isolated from the rhizosphere soil of rape, to control Fusarium wilt of cucumber seedlings caused by Fusarium oxysporum f. sp. cucumerinum. Results Strain HX-140 was able to produce protease, cellulase, beta-1,3-glucanase and antifungal volatile organic compounds. An in vitro dual culture test showed that strain HX-140 exhibited broad spectrum antifungal activity against soil-borne plant pathogenic fungi. Strain HX-140 also reduced the infection of Fusarium wilt of cucumber seedlings by 55.6% in a greenhouse pot experiment. A field plot experiment confirmed the biocontrol effects and further revealed that antifungal activity was positively correlated with inoculum size by the root-irrigation method. Here, inoculums at 10(6) 10(7) and 10(8) cfu/mL of HX-140 bacterial suspension reduced the incidence of Fusarium wilt of cucumber seedling by 19.5, 41.1, and 50.9%, respectively. Conclusions Taken together, our results suggest that P. polymyxa HX-140 has significant potential in the control of Fusarium wilt and possibly other fungal diseases of cucumber.

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