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Colonization by klebsiella variicola fh-1 stimulates soybean growth and alleviates the stress of Sclerotinia sclerotiorum

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Journal of Integrative Agriculture 2023年第9期22卷 2729-2745页

作者： ZHAI Qian-hang PAN Ze-qun ZHANG Cheng YU Hui-lin ZHANG Meng GU Xue-hu ZHANG Xiang-hui PAN Hong-yu ZHANG Hao College of Plant Protection Jilin Agricultural UniversityChangchun 130118P.R.China College of Plant Sciences Jilin UniversityChangchun 130062P.R.China

Sclerotinia stem rot,caused by Sclerotinia sclerotiorum,is a destructive soil-borne disease leading to huge yield *** previously reported that klebsiella variicola fh-1 could degrade atrazine herbicides,and the vegetative growth of atrazine-sensitive crops(i.e.,soybean)was significantly increased in the fh-1-treated ***,we found that fh-1 could promote soybean growth and induce resistance to *** our study,strain fh-1 could grow in a nitrogen-free environment,dissolve inorganic phosphorus and potassium,and produce indoleacetic acid and a *** results of pot experiments showed that *** fh-1 promoted soybean plant development,substantially improving plant height,fresh weight,and root length,and induced resistance against *** infection in soybean *** area under the disease progression curve(AUDPC)for treatment with strain fh-1 was significantly lower than the control and was reduced by up to 42.2%within 48 h(Pfh-1 rcovered the activities of catalase,superoxide dismutase,peroxidase,phenylalanine ammonia lyase,and polyphenol oxidase,which are involved in plant protection,and reduced malondialdehyde accumulation in the *** mechanism of induction of resistance appeared to be primarily resulted from the enhancement of transcript levels of PR10,PR12,AOS,CHS,and PDF1.2 *** colonization of fh-1 on soybean root,determined using CLSM and SEM,revealed that fh-1 colonized soybean root surfaces,root hairs,and exodermis to form *** summary,*** fh-1 exhibited the biological control potential by inducing resistance in soybean against *** infection,providing new suggestions for green prevention and control.

关键词： sclerotinia stem rot of soybean klebsiella variicola fh-1 inducing resistance root colonization biofilm

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