Selenium in soil enhances resistance of oilseed rape to Sclerotinia sclerotiorum by optimizing the plant microbiome

文献类型： 外文期刊

第一作者： Han, Chuang

作者： Han, Chuang;Cheng, Qin;Xie, Jiatao;Tang, Yanni;Zhang, Huan;Hu, Chengxiao;Zhao, Xiaohu;Han, Chuang;Du, Xiaoping;Zhao, Xiaohu;Liang, Lianming;Fan, Guocheng;Wang, Xu

作者机构：

关键词： Microbial diversity; oilseed rape; rhizosphere beneficial bacteria; Sclerotinia sclerotiorum; selenium; synthetic community

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 0022-0957

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Plants can recruit beneficial microbes to enhance their ability to resist disease. It is well established that selenium is beneficial in plant growth, but its role in mediating microbial disease resistance remains poorly understood. Here, we investigated the correlation between selenium, oilseed rape rhizosphere microbes, and Sclerotinia sclerotiorum. Soil application of 0.5 and 1.0 mg kg-1 selenium [selenate Na2SeO4, Se(VI) or selenite Na2SeO3, Se(IV)] significantly increased the resistance of oilseed rape to Sclerotinia sclerotiorum compared with no selenium application, with a disease inhibition rate higher than 20% in Se(VI)0.5, Se(IV)0.5 and Se(IV)1.0 mg kg-1 treatments. The disease resistance of oilseed rape was related to the presence of rhizosphere microorganisms and beneficial bacteria isolated from the rhizosphere inhibited Sclerotinia stem rot. Burkholderia cepacia and the synthetic community consisting of Bacillus altitudinis, Bacillus megaterium, Bacillus cereus, Bacillus subtilis, Bacillus velezensis, Burkholderia cepacia, and Flavobacterium anhui enhanced plant disease resistance through transcriptional regulation and activation of plant-induced systemic resistance. In addition, inoculation of isolated bacteria optimized the bacterial community structure of leaves and enriched beneficial microorganisms such as Bacillus, Pseudomonas, and Sphingomonas. Bacillus isolated from the leaves were sprayed on detached leaves, and it also performed a significant inhibition effect on Sclerotinia sclerotiorum. Overall, our results indicate that selenium improves plant rhizosphere microorganisms and increase resistance to Sclerotinia sclerotiorum in oilseed rape. Selenium in soil enhanced oilseed rape resistance to Sclerotinia stem rot by increasing the abundance of beneficial bacteria in the rhizosphere. Beneficial microbes protect plants by activating plant induced systemic resistance.

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