[Analysis of plasmids in Rhizobium meliloti strains of different geographical origin]

The presence of 1-3 additional plasmids ranging from 16 to 400 Md in mol mass was revealed in bacterial cells besides a megaloplasmid in most of 34 Rhizobium meliloti strains studied. No correlation was found between plasmids pattern and geographical origin of isolation source of the strain analyzed.