Population structure of rhizobium leguminosarum across multiple hosts.
Population genetic analysis of 298 bacterial isolates, predominantly Rhizobium leguminosarum, isolated from the rhizosphere, root surface and nodules of white clover and common vetch plants in the UK. Isolates were collected from 3 sites, separated by 200-400m, in the Walmgate Stray, York, where these plants grow in sympatry. the study investigates the connection between free-living and symbiotic rhizobia.