Open AccessTransfer of Sym-plasmids into symbiotically active and asymbiotic rhizobia strains: properties of recombinants and possible evolutionary consequences
Author(s) -
Н. А. Проворов,
И. Г. Фокина,
M. L. Roumiantseva,
Б. В. Симаров
Publication year - 2004
Publication title -
èkologičeskaâ genetika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.148
H-Index - 3
eISSN - 2411-9202
pISSN - 1811-0932
DOI - 10.17816/ecogen2229-34
Subject(s) - rhizobia , plasmid , biology , mutant , bacteria , microbiology and biotechnology , strain (injury) , genetics , symbiosis , gene , anatomy
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