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Appl Environ Microbiol. 1982 November; 44(5): 1102-1109
Copyright © 1982, American Society for Microbiology. All Rights Reserved.

Microcalorimetric Measurements of Glucose Metabolism by Marine Bacterium Vibrio alginolyticus

¹ Division of Marine and Atmospheric Chemistry, University of Miami, Miami, Florida 33149, and Department of Microbiology, University of Miami, Miami, Florida 33101²

ABSTRACT

Microcalorimetric measurements of heat production from glucose by Vibrio alginolyticus were made to assess the viability of calorimetry as a technique for studying the metabolism of marine bacteria at organic nutrient concentrations found in marine waters. The results show that the metabolism of glucose by this bacterium can be measured by calorimetry at submicromolar concentrations. A linear correlation between glucose concentration and total heat production was observed over a concentration range of 8 mM to 0.35 µM. It is suggested that these data indicate a constant efficiency of metabolism for this bacterium over the wide range of glucose concentrations studied.