異なる生育条件下で生育した低温性 Pseudomonas属細菌の生育曲線とアデノシンリン酸

概要

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Growth curves of the psychrotrophic Pseudomonas isolates (non-halophiles) showed an increased slope throughout growth (in Type 1 strains) or a decreased slope after the stationary phase of growth (in Type 2 strains). Type 1 and 2 strains had mostly optimum temperatures of 25C and below or above, respectively. Adenylate levels in Type 1 strains were high for AMP, moderate for ADP, and low for ATP, and adenosine phosphates in Type 2 strains was occupied by AMP alone during the growth phase with all of them disappearing during the death phase, regardless of the growth conditions (the growth temperatures and the media with altered concentrations of glucose). The AMP occupation in Type 2 strains was suggested to come from the rapid utilization of high-energy bonds due to the rapid growth, since the rapid consumption of adenylate phosphates added to the medium was observed in Type 2 strains. The values of energy charge during growth under the different growth conditions were below 0.49 or 0.01 in Type 1 or 2 strains, respectively. When growing on excess glucose (0.5%), the growth and the final pH values and adenylate concentrations in the cultures were different between Type 1 and 2 strains. These results indicated that the strains of the same Type comprise the same ecological groups, the two Type strains are composed of different ecotypes, and the dominant of AMP are characteristic of the psychrotrophic Pseudomonas spp.
長崎大学の論文