Rhizobium japonicum

Treatment of an extracellular polysaccharide of Rhizobium japonicum (an important factor for nitrogen-fixing symbiosis between bacteria and soybeans) with liquid HF (—40°, 30 min) gave mono- and oligo-saccharides involving 0- -D-glucopyranosyl-( 1 - 3)-C>-(4-0-acetyl-a-D-galactopyrano-syluronic acid)-(l— 3)-D-mannose and its 1-fluoride. 

K. Kaluza, M. Hahn, and H. Hennecke, Repeated sequences similar to insertion elements clustered around the nif region of the Rhizobium japonicum genome. J. Bacteriol. 162 535 (1985). 

Bradyrhizobium japonicum B. japonicum formerly Rhizobium japonicum... 

There are only a few instances in which amino acids have been implicated in allelopathy and in most cases the specific amino acids have not been identified. Rhizobitoxine is produced by certain strains of Rhizobium japonicum and is a nonprotein amino acid (84). Several of the phytotoxins produced by pathogenic microorganisms are polypeptides and related glycopeptides (82). 

Al-Rashidi, R. K., Loynachan, T. E. Frederick, L. R. (1982). Desiccation tolerance of four strains of Rhizobium japonicum. Soil Biology Biochemistry, 14, 489-93-Allard, A-S., Hynning, P-A., Remberger, M. Neilson, A. H. (1994). Bioavailability of chlorocatechols in naturally contaminated sediment samples and of chloroguaiacols covalently bound to C2-guaiacyl residues. Applied and Environmental Microbiology, 60, 777-84. 

A phytotoxin from the nodules produced by Rhizobium japonicum on the roots of soybean (Glycine max (L.) Merr.), termed rhizobitoxine, was identified by Owens et al. (231, 232, 233) as 2-amino.4-(2-amino-3-hydroxypropyl)-trans-but-3-enoic acid. Another closely related analog of rhizobitoxine,... 

These enol ether-substituted amino acids are natural products isolated from the fermentation broths of Rhizobium japonicum (rhizobitoxine) (31), Pseudomonas aeruginosa (methoxy analogue) (33) and a species of Streptomvces (ethoxy analogue) (34). 

Peisach, J., Appleby, C.A., and Blumberg, W.E. (1972) Electron paramagnetic resonance and temperature dependent spin state studies of ferric cytochrome P-450 from Rhizobium japonicum, Arch. Biochem. Biophys. 150, 725-732. 

Experiments with the Rhizobium japonicum 31 lb 83 extracellular polysaccharide (52) showed that, at—40°, the glycosidic linkages of 6-deoxyhexoses may be retained, at least partially. Indeed, under these conditions, solvolysis gave a combination of the repeating unit S3 and disaccharides of rhamnose and of (4-O-methylglucosyluronic acid)rhamnose. At —23°, this polysaccharide was degraded to rhamnose and the last-named disaccharide. 

Prepare a mixture of about 50% soil, 25% Pearlite (an expanded clay product) and 25% peat moss sufficient to fill two large flower pots. If the soil has not been used previously for soybeans, then it is necessary to inoculate it with nitrogen-fixing bacteria, some variety of Rhizobium japonicum, which can be obtained at a Co-oP. Mix a small handful into the soil in each pot. 

The formation and decay of the oxyferrous forms of the cytochromes P-450 isolated from Rhizobium japonicum. Rapid spectral scan and stopped flow studies. Biochim. Biophys. Acta 828, 144-150. 

A glucan has been synthesized from UDP-D-glucose- C by the action of a particulate enzymic preparation obtained from two strains of Rhizobium japonicum. The enzymic system requires Mg + or Mn " " in order to be active. ... 

This polysaccharide appears to be identical with a glucan (isolated from cultures of Agrobacterium tumefaciens) in which the main linkage between the D-glucose residues is - )S-D-(1 —> 2). The synthetic glucan obtained with active preparations from Rhizobium japonicum contains, in addition to this linkage, some )3-D-(l — 3)-... 

Rhizobium japonicum Mineral salts + yeast + mannitol 25 344 61... 

Rhizobium japonicum bacteroids French pressure cell Polypropylene glycol DEAE-cellulose Sephadex G-200... 

Cp, Clostridium pasteurianum Bp, Bacillus polymyxa Kp, Klebsiella pneumoniae Rr, Rhodospirillum rubrum Ac, Azotobacter chroococcum Xa, Xanthobacter autotrophicus Rj, Rhizobium japonicum Rl, Rhizobium leguminosarum bacteroids. 

Wedler f al. (1978) have identified two forms of glutamine synthetase in Bacillus caldolytiens and Darrow and Knotts (1977) have shown two forms in Rhizobium japonicum and other free living root nodule bacteria. In both cases the two forms differ in their isoelectric points and stability. The work of Darrow and Knotts (1977) indicates that the two forms are not the result of differences in adenylation state of a single form. Type I appears similar to the E. coli enzyme in stability and in being susceptible to adenylation. Type II however is not adenylated and is more unstable. 

Karr D.B., Waters J.K., Suzuki F., Emerich D.W., 1984, Enzymes of the poly-P-hydroxybutyrate and citric acid cycles of Rhizobium Japonicum bacteroids. Plant Physiol. 75 1158-1162. 

Hahn M., Meyer L., Studer D., Regcnsburger B. and Homedre H., 1984, Insertion and deletion mutations within the njfregion of Rhizobium japonicum. Plant Mol. Biol. 3 159-168. 

A similar peptide toxin, rhizobitoxin (16), is produced by the root-nodulating organism Rhizobium japonicum. Rhizobitoxin causes chlorosis in the developing leaflets of plants, such as soybean Glycine max), which have nodules colonized with these strains of Rhizobium japonicum (Mitchell, 1981). This compound is a irreversible inhibitor of ethylene production from methionine, as it blocks the conversion... 

C2oH320t8 560.462 Constit. of the repeating unit of an extracellular polysaccharide of Rhizobium japonicum strain 3Ilb 138. May play a role in recognition place between the bacteria legumes in the establishment of nitrogen fixing symbiosis Syrup. 

Higher homologue of Kojitriose, K-18. Prob. struct. Isol. from Rhizobium japonicum strain 561. Sol. H2O. Md +166.3 (c, 1.6 in HjO). 

Reducing disaccharide. Constit. of the repeating unit of the capsular antigen of Klebsiella K32, of the type specific antigen of Streptococcus pneumoniae type 17F, and of the extracellular polysaccharides from various strains of Rhizobium japonicum. Syrup. Md +10.1 (c, 1.3 in MeOH). Mg +4.3 (c, 2 in H2O). 

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