Mesorhizobium jarvisii is a dominant and widespread species symbiotically efficient on Astragalus sinicus L. in the Southwest of China

文献类型： 外文期刊

第一作者： Zhang, Junjie

作者： Zhang, Junjie;Shang, Yimin;Li, Shuo;Peng, Shanshan;Guo, Chen;Zhang, Junjie;Liu, Chunzeng;Brunel, Brigitte;Wang, Entao;Guo, Chen;Chen, Wenfeng;Chen, Wenfeng;Chen, Wenfeng

作者机构：

关键词： Mesorhizobium jarvisii; Astragalus sinicus L.; Southwest China; Genetic diversity; Biogeography

期刊名称：SYSTEMATIC AND APPLIED MICROBIOLOGY （ 影响因子：4.022； 五年影响因子：4.396 ）

ISSN： 0723-2020

年卷期： 2020 年 43 卷 5 期

页码：

收录情况： SCI

摘要： In order to identify rhizobia ofAstragalus sinicus L. and estimate their geographic distribution in the Southwest China, native rhizobia nodulating A. sinicus were isolated and their genetic diversity were studied at 13 sites cultivated in four Chinese provinces. A total of 451 rhizobial isolates were trapped with A. sinicus plants from soils and classified into 8 different genotypes defined by PCR-based restriction fragment length polymorphism (RFLP) of 16S-23S rRNA intergenic spacer (IGS). Twenty-one representative strains were further identified into three defined Mesorhizobium species by phylogenetic analyses of 16S rRNA genes and housekeeping genes (glnII and atpD). M. jarvisii was dominant accounting for 76.3% of the total isolates, 22.8% of the isolates were identified as M. huakuii and five strains belonged to M. qingshengii. All representatives were assigned to the symbiovar astragali by sharing high nodC sequence similarities of more than 99%. Furthermore, the biogeography distribution of these rhizobial genotypes and species was mainly affected by contents of available phosphorus, available potassium, total salts and pH in soils. The most remarkable point was the identification of M. jarvisii as a widespread and predominant species of A. sinicus in southwest of China. These results revealed a novel geographic pattern of rhizobia associated with A. sinicus in China. (C) 2020 Elsevier GmbH. All rights reserved.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序