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Silicon Application for the Modulation of Rhizosphere Soil Bacterial Community Structures and Metabolite Profiles in Peanut under Ralstonia solanacearum Inoculation

文献类型： 外文期刊

作者： Deng, Quanqing 1 ; Liu, Hao 1 ; Lu, Qing 1 ; Gangurde, Sunil S. 2 ; Du, Puxuan 1 ; Li, Haifen 1 ; Li, Shaoxiong 1 ; Liu, Haiyan 1 ; Wang, Runfeng 1 ; Huang, Lu 1 ; Chen, Ronghua 3 ; Fan, Chenggen 3 ; Liang, Xuanqiang 1 ; Chen, Xiaoping 1 ; Hong, Yanbin 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Crops Res Inst, South China Peanut Sub Ctr Natl Ctr Oilseed Crops, Guangdong Prov Key Lab Crop Genet Improvement, Guangzhou 510640, Peoples R China

2.Univ Georgia, Dept Plant Pathol, Tifton, GA 30602 USA

3.Inst Agr Sci Ganzhou, Ganzhou 341000, Peoples R China

关键词： metabolomics; peanut; silicon; peanut bacterial wilt; Ralstonia solanacearum; soil bacterial community

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN：

年卷期： 2023 年 24 卷 4 期

页码：

收录情况： SCI

摘要： Silicon (Si) has been shown to promote peanut growth and yield, but whether Si can enhance the resistance against peanut bacterial wilt (PBW) caused by Ralstonia solanacearum, identified as a soil-borne pathogen, is still unclear. A question regarding whether Si enhances the resistance of PBW is still unclear. Here, an in vitro R. solanacearum inoculation experiment was conducted to study the effects of Si application on the disease severity and phenotype of peanuts, as well as the microbial ecology of the rhizosphere. Results revealed that Si treatment significantly reduced the disease rate, with a decrement PBW severity of 37.50% as compared to non-Si treatment. The soil available Si (ASi) significantly increased by 13.62-44.87%, and catalase activity improved by 3.01-3.10%, which displayed obvious discrimination between non-Si and Si treatments. Furthermore, the rhizosphere soil bacterial community structures and metabolite profiles dramatically changed under Si treatment. Three significantly changed bacterial taxa were observed, which showed significant abundance under Si treatment, whereas the genus Ralstonia genus was significantly suppressed by Si. Similarly, nine differential metabolites were identified to involve into unsaturated fatty acids via a biosynthesis pathway. Significant correlations were also displayed between soil physiochemical properties and enzymes, the bacterial community, and the differential metabolites by pairwise comparisons. Overall, this study reports that Si application mediated the evolution of soil physicochemical properties, the bacterial community, and metabolite profiles in the soil rhizosphere, which significantly affects the colonization of the Ralstonia genus and provides a new theoretical basis for Si application in PBW prevention.

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