Effect of Drought Stress and Developmental Stages on Microbial Community Structure and Diversity in Peanut Rhizosphere Soil
文献类型： 外文期刊
作者： Dai, Liangxiang 1 ; Zhang, Guanchu 1 ; Yu, Zipeng 2 ; Ding, Hong 1 ; Xu, Yang 1 ; Zhang, Zhimeng 1 ;
作者机构： 1.Shandong Acad Agr Sci, Shandong Peanut Res Inst, Qingdao 266100, Shandong, Peoples R China
2.Shandong Agr Univ, State Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China
关键词： peanut (Arachis hypogaea L; ); rhizosphere; microbial community structure; drought stress
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）
ISSN： 1422-0067
年卷期： 2019 年 20 卷 9 期
页码：
收录情况： SCI
摘要： Background: Peanut (Arachis hypogaea L.), an important oilseed and food legume, is widely cultivated in the semi-arid tropics. Drought is the major stress in this region which limits productivity. Microbial communities in the rhizosphere are of special importance to stress tolerance. However, relatively little is known about the relationship between drought and microbial communities in peanuts. Method: In this study, deep sequencing of the V3-V4 region of the 16S rRNA gene was performed to characterize the microbial community structure of drought-treated and untreated peanuts. Results: Taxonomic analysis showed that Actinobacteria, Proteobacteria, Saccharibacteria, Chloroflexi, Acidobacteria and Cyanobacteria were the dominant phyla in the peanut rhizosphere. Comparisons of microbial community structure of peanuts revealed that the relative abundance of Actinobacteria and Acidobacteria dramatically increased in the seedling and podding stages in drought-treated soil, while that of Cyanobacteria and Gemmatimonadetes increased in the flowering stage in drought-treated rhizospheres. Metagenomic profiling indicated that sequences related to metabolism, signaling transduction, defense mechanism and basic vital activity were enriched in the drought-treated rhizosphere, which may have implications for plant survival and drought tolerance. Conclusion: This microbial communities study will form the foundation for future improvement of drought tolerance of peanuts via modification of the soil microbes.
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