Biological Control of Take-All and Growth Promotion in Wheat by Pseudomonas chlororaphis YB-10

文献类型： 外文期刊

第一作者： Xu, Wen

作者： Xu, Wen;Deng, Xiaoxu;Xia, Mingcong;Zhang, Jie;Sun, Runhong;Pan, Yamei;Wu, Chao;Yang, Lirong;Xu, Wen;Deng, Xiaoxu;Xia, Mingcong;Zhang, Jie;Sun, Runhong;Pan, Yamei;Wu, Chao;Yang, Lirong;Xu, Lingling;Goodwin, Paul H.;Wang, Qi

作者机构：

关键词： take-all; biocontrol; growth-promoting; Pseudomonas chlororaphis; Gaeumannomyces graminis var; tritici

期刊名称：PATHOGENS （ 影响因子：3.492； 五年影响因子：4.066 ）

ISSN：

年卷期： 2021 年 10 卷 7 期

页码：

收录情况： SCI

摘要： Wheat is a worldwide staple food crop, and take-all caused by Gaeumannomyces graminis var. tritici can lead to a tremendous decrease in wheat yield and quality. In this study, strain YB-10 was isolated from wheat rhizospheric soil and identified as Pseudomonas chlororaphis by morphology and 16S rRNA gene sequencing. Pseudomonas chlororaphis YB-10 had extracellular protease and cellulase activities and strongly inhibited the mycelium growth of Gaeumannomyces graminis var. tritici in dual cultures. Up to 87% efficacy of Pseudomonas chlororaphis YB-10 in controlling the take-all of seedlings was observed in pot experiments when wheat seed was coated with the bacterium. Pseudomonas chlororaphis YB-10 was also positive for indole acetic acid (IAA) and siderophore production, and coating wheat seed with the bacterium significantly promoted the growth of seedlings at 10(7) and 10(8) CFU/mL. Furthermore, treatment with Pseudomonas chlororaphis YB-10 increased activities of the wheat defense-related enzymes POD, SOD, CAT, PAL and PPO in seedlings, indicating induced resistance against pathogens. Overall, Pseudomonas chlororaphis YB-10 is a promising new seed-coating agent to both promote wheat growth and suppress take-all.

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