Genetic diversity and distribution of rhizobia associated with soybean in red soil in Hunan Province,Archives of Microbiology

当前位置： X-MOL 学术 › Arch. Microbiol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Genetic diversity and distribution of rhizobia associated with soybean in red soil in Hunan Province
Archives of Microbiology ( IF 2.3 ) Pub Date : 2021-01-04 , DOI: 10.1007/s00203-020-02120-6
Lu Liu ₁ , Xi Chen ₁ , Shujuan Hu _{1,

2} , Qingcai Zhan ₁ , Weizheng Peng ₁

Affiliation

To explore the genetic diversity and distribution of rhizobia in the rhizosphere of soybean grown in red soil, we have collected 21 soil samples from soybean fields across seven counties in Hunan province, China. MiSeq sequencing of rpoB gene was used to determine the intra-species diversity of rhizobia existing in soybean rhizospheres. Soil chemical properties were determined by routine methods. The Principal Coordinates Analysis (PCoA) plot indicated a clear biogeographical pattern characterizing the soybean rhizosphere across different sites. The Mantel test demonstrated that biogeographical pattern was significantly correlated with the geographical distance (Mantel statistic R 0.385, p < 0.001). There were obvious differences in the rhizobial communities among northeastern eco-region, southeastern eco-region and western eco-region. In general, Bradyrhizobium diazoefficiens was the most abundant rhizobial species in the soybean rhizosphere. At an intermediate (10-400 km) spatial scale, the biogeographical pattern of rhizobial communities in soybean rhizosphere is associated with both soil properties and geographical distance. Redundancy analysis (RDA) showed that total potassium (TK), available potassium (AK), soil organic carbon (SOC), and available nitrogen (AN) were the main factors that influenced the α-diversity of rhizobial communities. Canonical correspondence analysis (CCA) showed that pH and exchangeable Ca and Mg had the greatest influence on the β-diversity of the rhizobial communities in the soybean rhizosphere. These findings characterize the distribution pattern and its influencing factors of soybean rhizobia in rhizosphere in Hunan province, which may be helpful in selecting suitable strains or species as inoculants for soybeans in red soil regions.

更新日期：2021-01-04

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11