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
作者： Zhai, Yang 1 ; Zhu, Jiu-xiang 1 ; Tan, Tai-meng 1 ; Xu, Jian-ping 1 ; Shen, Ai-rong 2 ; Yang, Xie-bin 1 ; Li, Ji-lie 2 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Bast Fiber Crops, 348 Xianjiahu West Rd, Changsha 410205, Hunan, Peoples R China
2.Cent South Univ Forestry & Technol, Hunan Prov Key Lab Forestry Biotechnol, Changsha 410004, Peoples R China
3.Hunan Acad Forestry, Changsha 410004, Peoples R China
4.Hunan Acad Agr Sci, Inst Plant Protect, 726 Yuanda 2nd Rd, Changsha 410125, Hunan, Peoples R China
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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