The Low Biomass Yields of the Acetic Acid Bacterium Acetobacter pasteurianus Are Due to a Low Stoichiometry of Respiration-Coupled Proton Translocation.

Applied and Environmental Microbiology
M A LuttikJack T Pronk

Abstract

Growth energetics of the acetic acid bacterium Acetobacter pasteurianus were studied with aerobic, ethanol-limited chemostat cultures. In these cultures, production of acetate was negligible. Carbon limitation and energy limitation were also evident from the observation that biomass concentrations in the cultures were proportional to the concentration of ethanol in the reservoir media. Nevertheless, low concentrations of a few organic metabolites (glycolate, citrate, and mannitol) were detected in culture supernatants. From a series of chemostat cultures grown at different dilution rates, the maintenance energy requirements for ethanol and oxygen were estimated at 4.1 mmol of ethanol (middot) g of biomass(sup-1) (middot) h(sup-1) and 11.7 mmol of O(inf2) (middot) g of biomass(sup-1) (middot) h(sup-1), respectively. When biomass yields were corrected for these maintenance requirements, the Y(infmax) values on ethanol and oxygen were 13.1 g of biomass (middot) mol of ethanol(sup-1) and 5.6 g of biomass (middot) mol of O(inf2)(sup-1), respectively. These biomass yields are very low in comparison with those of other microorganisms grown under comparable conditions. To investigate whether the low growth efficiency of A. pasteurianus...Continue Reading

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Citations

Sep 8, 2004·Biotechnology and Bioengineering·Henri KornmannUrs von Stockar
May 20, 2014·Applied and Environmental Microbiology·Philipp AdlerChristoph Wittmann
Nov 27, 2018·Royal Society Open Science·Mauricio Moreno-ZambranoMarc-Thorsten Hütt
May 1, 2019·Comprehensive Reviews in Food Science and Food Safety·Kieran M LynchElke K Arendt
May 5, 2017·Antonie van Leeuwenhoek·Vijayendran RaghavendranAndreas Karoly Gombert

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