Effects of pH and osmotic stress on cellular polyamine contents in the soybean rhizobia Rhizobium fredii P220 and Bradyrhizobium japonicum A1017
Article Abstract:
The effects of polyamines on the acidity and osmotic tolerance of the physiology of agronomically important microorganisms were evaluated. Strains of Rhizobium fredii and Bradyrhizobium japonicum were subjected to acid-stressed conditions. Sodium chloride, potassium chloride, sucrose and glycerol were used as osmotic agents. Differences between the two strains were linked to their transportation of inorganic cations and their metabolization of cellular homspd.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1993
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Regulation of lipid synthesis in Bradyrhizobium japonicum: low oxygen concentrations trigger phosphatidylinositol biosynthesis
Article Abstract:
Low oxygen concentrations can trigger a remarkable transformation of membrane chemistry in free-living Bradyrhizobium japonicum. Under normal aeration, the major lipid species was found to be phosphatidylcholine. In contrast, phosphatidylethanolamine replaced phosphatidylcholine as the major lipid once conditions became microaerobic. In addition to this, synthesis of phosphatidylinositol was also observed.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1998
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Purification and characterization of an NAD-malic enzyme from Bradyrhizobium japonicum A1017
Article Abstract:
A study was conducted to analyze an NAD-malic enzyme purified to homogeneity from Bradyrhizobium japonicum A1017. The molecular properties of the enzyme was also examined. The role of the enzyme in the carbon metabolism of bacteroids was then discussed. Results indicated that the enzyme supported native and subunit molecular masses of 388 and 85 kDa. Findings also showed that it exists as a homotetramer.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1998
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- Abstracts: Genetic and phenotypic diversity of Bacillus polymyxa in soil and in the wheat rhizosphere. Rapid in situ hybridization technique using 16S rRNA segments for detecting and differentiating the closely related gram-positive organisms Bacillus polymyxa and Bacillus macerans
- Abstracts: Formation of novel polysaccharides by Bradyrhizobium japonicum bacteroids insoybean nodules. The soybean Rj4 allele restricts nodulation by Bradyrhizobium japonicum serogroup 123 strains
- Abstracts: Effect of compatible solutes on survival of lactic acid bacteria subjected to drying. Metabolism of tetralin (1,2,3,4-tetrahydronapthalene) in Corynebacterium sp.strain C125
- Abstracts: Mode of action of lactococcin B, a thiol-activated bacteriocin from Lactococcus lactis. Germination of Bacillus cereus spores is induced by germinants for differentiated caco-2 cells, a human cell line mimicking the epithelial cells of the small intestine