COMPARATIVE STUDY OF EFFECT OF TEMPERATURE ON METABOLISM OF PSYCHROPHILIC AND MESOPHILIC BACTERIA

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Abstract
Temperature coefficient differences between mesophiles and psychrophiles have found for the catabolic processes: glucose oxidation, acetate oxidation, and formate oxidation by resting cells. These differences parallel those previously reported for growth. The effect of temperature on the rate of reactions catalyzed by malic, isocitric, and glucose-6-phosphate dehydrogenase was found to be the same for preparations from psychrophiles and mesophiles. Very little difference in the effect of temperature on glucose oxidation by cell-free preparations was found between psychrophiles and mesophiles. Data indicate that the temperature coefficient differences between psychrophiles and mesophiles for growth and catabolism is probably a result of some aspect of cellular organization rather than of enzymatic differences.