Genetic diversity and biogeography of rhizobia associated with Caragana species in three ecological regions of China

  • Lu Y
  • Chen W
  • Wang E
 et al. 
  • 27


    Mendeley users who have this article in their library.
  • 34


    Citations of this article.


Twenty-two genospecies belonging mainly to Mesorhizobium, and occasionally to Rhizobium and Bradyrhizobium, were defined among the 174 rhizobia strains isolated from Caragana species. Highly similar nodC genes were found in the sole Bradyrhizobium strain and among all the detected Mesorhizobium strains. A clear correlation between rhizobial genospecies and the eco-regions where they were isolated was found using homogeneity analysis. All these results demonstrated that Caragana species had stringently selected the rhizobia symbiotic genotype, but not the genomic background; lateral transfer of symbiotic genes from Mesorhizobium to Bradyrhizobium and among the Mesorhizobium species has happened in the Caragana rhizobia; and biogeography of Caragana rhizobia exists. Furthermore, a combined cluster analysis, based upon the patterns obtained from amplified 16S rRNA gene and 16S-23S intergenic spacer restriction analyses, BOX PCR and SDS-PAGE of proteins, was reported to be an efficient method to define the genospecies. © 2008 Elsevier GmbH. All rights reserved.

Author-supplied keywords

  • Caragana
  • Combined cluster analysis
  • Diversity
  • Eco-region
  • Mesorhizobium

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Yang Li Lu

  • Wen Feng Chen

  • En Tao Wang

  • Su Hua Guan

  • Xue Rui Yan

  • Wen Xin Chen

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free