Antigenic analysis of Rhizobium japonicum by immunodiffusion.

Serological Relatedness of Rhizobium fredii to Other Rhizobia and to the Bradyrhizobia.

Several isolates of Rhizobium fredii were examined for their serological relatedness to each other, to Bradyrhizobium japonicum, and to other fast- and slow-growing rhizobia. Immunofluorescence, agglutination, and immunodiffusion analyses indicated that R. fredii contains at least three separate somatic serogroups, USDA 192, USDA 194, and USDA 205. There was no cross-reaction between any of the...

Possible involvement of a megaplasmid in nodulation of soybeans by fast-growing rhizobia from china.

Several isolates from a newly described group of fast-growing acid-producing soybean rhizobia, Rhizobium japonicum, were analyzed for plasmid content. All contained from one to four plasmids with molecular weights of 100 x 10 or larger. Although most of the isolates shared plasmids of similar size, the restriction endonuclease (BamHI, EcoRI, and HindIII) patterns of the plasmids from three of t...

بررسی آنالیز رشد ارقام سویا تحت تأثیر نژادهای باکتری Rhizobium japonicum

Rhizobiumjaponicum to Azotobacter vinelandii of Genes Required for Nodulation

Recently, much attention has focused on the role that plant lectins play in the establishment of the N2-fixing symbiosis between legumes and bacteria belonging to the genus Rhizobium (1-4, 10). Lectins from legumes interact with the 0 antigen-containing lipopolysaccharides of their rhizobial symbionts (10). The 0-antigen fractions of wild-type and non-nodulating mutant strains of Rhizobium japo...

Predominance of Fast-Growing Rhizobium japonicum in a Soybean Field in the People's Republic of China.

Soybean rhizobia were isolated from two soils with different cropping histories from Hubei province in central China. The first, from Honghu county, has been under soybean cultivation for decades. All of the isolates obtained from nodules on soybeans growing in this soil were fast-growing, acid-producing rhizobia. However, slow-growing, alkali-producing isolates were obtained at higher dilution...