Total energy flux in a marine bioluminescent bacterium

The total heat production from luminous bacteria growing on glycerol as a sole source of carbon and energy was measured in an isothermal microcalorimeter and compared to the light emitted and growth yield. Substrate concentration was measured before and after growth to calculate the amount of substr...

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Bibliographic Details
Published in:FEMS microbiology letters 1989-01, Vol.57 (2), p.161-165
Main Authors: Makemson, John C., Gordon, Andrew S.
Format: Article
Language:English
Subjects:
Bacteriology
Biological and medical sciences
Energy flux
Fundamental and applied biological sciences. Psychology
Luminous bacteria
Marine
Metabolism. Enzymes
Microbiology
Microcalorimetry
Vibrio harveyi
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Summary:The total heat production from luminous bacteria growing on glycerol as a sole source of carbon and energy was measured in an isothermal microcalorimeter and compared to the light emitted and growth yield. Substrate concentration was measured before and after growth to calculate the amount of substrate utilized. From these data the total energy flux was determined for Vibrio harveyi: a 25 ml culture consumed 328 micromoles of glycerol (130 cal) and produced 54 calories of heat, 76.3 cal of biomass, and 3.5 millicalories of light. Bioluminescence was then only a very small fraction (0.007%) of the total energy expended.
ISSN:0378-1097
1574-6968
DOI:10.1111/j.1574-6968.1989.tb03292.x