Transfer of Sym-plasmids into symbiotically active and asymbiotic rhizobia strains: properties of recombinants and possible evolutionary consequences
Nikolay A Provorov , I G Fokina , Marina L Roumiantseva , Boris V Simarov
Ecological Genetics ›› 2004, Vol. 2 ›› Issue (2) : 29 -34.
Transfer of Sym-plasmids into symbiotically active and asymbiotic rhizobia strains: properties of recombinants and possible evolutionary consequences
Transfer of Sym-plasmids from the clover rhizobia to avirulent mutants of the same rhizobia species or of alfalfa rhizobia resulted in recombinants with a restored symbiotic activity. Transfer of these plasmids into the wild type isogenic strains lead to a decrease of their symbiotic activity. These data confirm the hypothesis on the crucial role of avirulent rhizobia strains in the transfer of Sym-plasmids which directs evolution of these bacteria
Provorov N.A., Fokina I.G., Roumiantseva M.L., Simarov B.V.
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