Bacillus velezensis, a potential and efficient biocontrol agent in control of pepper gray mold caused by Botrytis cinerea
文献类型： 外文期刊
作者： Jiang, Chun-Hao 1 ; Liao, Meng-Jie 1 ; Wang, Hong-Kai 1 ; Zheng, Ming-Zi 1 ; Xu, Jian-Jun 4 ; Guo, Jian-Hua 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Plant Protect, Engn Ctr Bioresource Pesticide Jiangsu Prov, Dept Plant Pathol, Nanjing 210095, Jiangsu, Peoples R China
2.Minist Agr, Key Lab Monitoring & Management Crop Dis & Pest I, Nanjing, Jiangsu, Peoples R China
3.Nanjing Agr Univ, Coll Life Sci, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China
4.Xinjiang Acad Agr Sci, Inst Plant Protect, Urumqi, Peoples R China
5.Like Bldg,NAU 14, Nanjing 210095, Jiangsu, Peoples R China
关键词： Biological control; Bacillus velezensis; Botrytis cinerea; Pepper seedlings; Induced systemic resistance
期刊名称：BIOLOGICAL CONTROL （ 影响因子：3.687； 五年影响因子：3.962 ）
ISSN： 1049-9644
年卷期： 2018 年 126 卷
页码：
收录情况： SCI
摘要： Plant gray mold disease caused by necrotrophic pathogen Botrytis cinerea, has been a serious threat to many important crops. It is urgent and necessary to seek an effective and environmentally friendly control strategy to control grey mold disease during the crop production. Moreover, it is also urgently needed to clear understand how the strategy works. To screening an efficient biocontrol agent in control of gray mold disease caused by B. cinerea, one hundred strains, which have the potential in controlling plant diseases, were selected from our laboratory's strain library, and employed to our research. The results in the study indicated that Bacillus velezensis could act as a potential and efficient biocontrol agent (BCA), and two B. velezensis strains 5YN8 and DSN012 were screened out with high antagonistic and hydrolase activity, which could significantly control pepper gray mold disease and promote the pepper growth. Further deeply study on biocontrol mechanism indicated that B. velezensis could suppress the growth and spore formation of B. cinerea by secreting some secondary metabolites or releasing numbers of volatile organic compounds (VOCs). In the other hand, we also found that B. velezensis could trigger plant basal immunity. The BCA could increase the expression of SA signal markers and plant defense related genes. It was able to induce hydrogen peroxide accumulation and plant related enzyme activities in leaves of pepper as well. This study provides another high-efficiency, and potential strategies for the biological control of gray mold disease. It is the first report of B. velezensis strain which can control gray mold disease, In addition, it is also the first to comprehensively illustrate how the strains can efficiently protect pepper from B. cinerea attacking.
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