Oxygen protection of nitrogen fixation in free-living Azorhizobium caulinodans: the role of cytochrome aa3
Article Abstract:
Continuous cultures and transient cultures were used to evaluate the growth characteristics of the cytochrome aa(sub 3) mutant and the wild-type strain of Azorhizobium caulinodans. The wild-type exhibited higher growth yield in succinate-limited chemostats while the increase in dissolved oxygen tension resulted to a decline in the growth yield of both mutants. Respiratory protection does not explain the negative impact of oxygen on the growth of A. caulinodans.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Rapid phenotypic change and diversification of a soil bacterium during 1000 generations of experimental evolution
Article Abstract:
Bacteria exhibit parallel genetic adaptations and differences among populations subjected to varied environment. Data show that though phenotypic motiffs differed with respect to substrate utilization, bile salt sensitivity, adhesion properties, and fatty acid composition, variation in colony morphology was greater among bacteria evolved in solid media as opposed to liquid media.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
Azorhizobium caulinodans pyruvate dehydrogenase activity is dispensable for aerobic but required for microaerobic growth
Article Abstract:
Research examines the mechanism of adaptation of metabolic energy transduction process in the microaerophilic bacteria when the dissolved oxygen tension is markedly decreased. The Azorhizobium caulinodans uses pyruvate dehydrogenase complex for microaerobic growth but not for aerobic growth suggesting that the energy trasduction of the two processess are qualitatively different.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Photosynthate partitioning and fermentation in hot spring microbial mat communities. Cultivation of aerobic chemoorganotrophic proteobacteria and gram-positive bacteria from a hot spring microbial mat
- Abstracts: Genetic organization of the mle locus and identification of a mleR-like gene from Leuconostoc oenos. Molecular characterization of the gene encoding an 18-kilodalton small heat shock protein associated with the membrane of Leuconostoc oenos
- Abstracts: Energetics of incubation in free-living Orange-breasted Sunbirds in South Africa. Field metabolism and water flux of Carolina Chickadees during breeding and nonbreeding seasons: a test of the "peak-demand" and "reallocation" hypotheses
- Abstracts: Out of the iron age: new insights into the critical role of manganese homeostasis in bacteria. Moving folded proteins across the bacterial cell membrane
- Abstracts: Exopolysaccharide production in biofilms: substratum activation of alginate gene expression by Pseudomonas aeruginosa