New Insight into the Evolution of Symbiotic Genes in Black Locust-Associated Rhizobia.

ABSTRACT: Nitrogen fixation in legumes occurs via symbiosis with rhizobia. This process involves packages of symbiotic genes on mobile genetic elements that are readily transferred within or between rhizobial species, furnishing the recipient with the ability to interact with plant hosts. However, it remains elusive whether plant host migration has played a role in shaping the current distribution of genetic variation in symbiotic genes. Herein, we examined the genetic structure and phylogeographic pattern of symbiotic genes in 286 symbiotic strains of Mesorhizobium nodulating black locust (Robinia pseudoacacia), a cross-continental invasive legume species that is native to North America. We conducted detailed phylogeographic analysis and approximate Bayesian computation to unravel the complex demog

SUBMITTER: Liu Z 

PROVIDER: S-EPMC6698633 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature