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

doi:10.17816/ecogen2229-34

Ecological Genetics ›› 2004, Vol. 2 ›› Issue (2) : 29 -34. DOI: 10.17816/ecogen2229-34

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Transfer of Sym-plasmids into symbiotically active and asymbiotic rhizobia strains: properties of recombinants and possible evolutionary consequences

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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

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Nikolay A Provorov, I G Fokina, Marina L Roumiantseva, Boris V Simarov. Transfer of Sym-plasmids into symbiotically active and asymbiotic rhizobia strains: properties of recombinants and possible evolutionary consequences. Ecological Genetics, 2004, 2(2): 29-34 DOI:10.17816/ecogen2229-34

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