Comprehensive effects of salt stress and peanut cultivars on the rhizosphere bacterial community diversity of peanut
文献类型： 外文期刊
作者： Xu, Yang 1 ; Zhang, Zhimeng 1 ; Ding, Hong 1 ; Wen, Saiqun 1 ; Zhang, Guanchu 1 ; Qin, Feifei 1 ; Dai, Liangxiang 1 ;
作者机构： 1.Shandong Acad Agr Sci, Shandong Peanut Res Inst, Qingdao 266100, Shandong, Peoples R China
关键词： 16S rRNA; Arachis hypogaea L; Peanut cultivars; Rhizosphere bacterial community; Salt stress
期刊名称：ARCHIVES OF MICROBIOLOGY （ 影响因子：2.552； 五年影响因子：2.475 ）
ISSN： 0302-8933
年卷期： 2022 年 204 卷 1 期
页码：
收录情况： SCI
摘要： Plant rhizosphere bacterial communities are central to plant growth and stress tolerance, which differ across cultivars and external environments. The goal of this study was to assess the comprehensive effects of salt stress and peanut cultivars on rhizosphere bacterial community diversity. In this study, we investigated the effects of salt stress on peanut morphology and pod yield and the associated rhizosphere bacterial diversity using statistical analysis and 16S rRNA gene sequencing, respectively. Statistical analysis exhibited that salt stress indeed affected peanut growth and pod yield, and various peanut cultivars showed divergences. Taxonomic analysis showed that the bacterial community predominantly consisted of phyla Actinobacteria, Proteobacteria, Chloroflexi, Acidobacteria, and Cyanobacteria in peanut rhizosphere soils. Among these bacteria, numbers of beneficial bacteria Cyanobacteria and Proteobacteria increased, especially in the salt-resistant cultivars, while that of Acidobacteria decreased after salt treatment. Nitrogen-fixing bacterium Rhizobium closely related to peanut nodulation was significantly improved in rhizosphere soils of salt-resistant cultivars after salt treatment. Metabolic function prediction showed that the percentages of reads categorized to signaling transduction and inorganic ion transport and metabolism were higher in the salt-treated soils, which may be conducive to peanut survival and salt tolerance to some extent. The study is, therefore, crucially important to develop the foundation for improving the salt tolerance of various peanut cultivars via modifying the soil bacterial community.
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