NOTES: Transfer of Rhizobium japonicum Buchanan 1980 to Bradyrhizobium gen. nov., a Genus of Slow-Growing, Root Nodule Bacteria from Leguminous Plants

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Abstract
Recent data indicate that the slow-growing, non-acid-producing root nodule bacteria of leguminous plants should be separated from the fast-growing, acid-producing strains and placed in a new genus. The separation is warranted by numerical taxonomy, DNA base ratio determinations, nucleic acid hybridization, rRNA cistron similarities, serology, composition of extracellular gum, carbohydrate utilization and metabolism, bacteriophage and antibiotic susceptibilities, protein composition and types of intracellular inclusion bodies in the bacteroid forms. The name proposed for the new genus is BRADYRHIZOBIUM. The type species of the genus is B. japonicum (Buchanan 1980) comb. nov. (basonym: Rhizobium japonicum Buchanan 1980), the type strain of which is ATCC 10324.