Abstract:The symbiotic plasmid pJBSJI of Rhizobium leguminosarum biovar viceae was transfered into R. huakuii strain 7653R (wild type, Nod+Fix~+) and strain 7653R+1 (sym plasmid-cured mutant from 7653R. Nod~-). 7653R+1 transconjugant can t nodulate pea ineffective