Document Detail


Microcalorimetric studies of the growth of sulfate-reducing bacteria: comparison of the growth parameters of some Desulfovibrio species.
MedLine Citation:
PMID:  7056697     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We performed a comparative study of the growth energetics of some species of Desulfovibrio by measuring microcalorimetric and molar growth yield values. Lactate and pyruvate were used as energy sources for sulfate reduction. On lactate-sulfate media Desulfovibrio desulfuricans Norway, Desulfovibrio gigas, and Desulfovibrio africanus exhibited molar growth yields of 4.1 +/- 0.6, 3.7 +/- 1.7, and 1.8 +/- 0.1 g/mol, respectively, whereas on pyruvate-sulfate media the molar growth yields were higher (8.5 +/- 0.8, 7.7 +/- 1.6, and 3.5 +/- 0.5 g/mol, respectively). Thus, we found that D. africanus was the least efficient species in converting energy into cell material. The uncoupling of energy in this strain was obvious since its catabolic activities were high compared with those of the two other strains. The enthalpy changes associated with lactate and pyruvate metabolism were -49 +/- 0.7 and -70.2 +/- 6.0 jK/mol, respectively, for D. desulfuricans, -76.6 +/- 1.8 and -91.2 +/- 1.1 kJ/mol, respectively, for D. gigas, and -78.8 +/- 7.2 and -88.0 +/- 6.2 kJ/mol, respectively, for D. africanus. D. gigas and D. africanus produced only acetate, CO2 and hydrogen sulfide as metabolic end products. In addition to these normal end products, D. desulfuricans Norway produced a small amount of butanol. This butanol production was interpreted as reflecting a regulatory system of electron flow during the catabolism of both substrates. Such metabolism was comparable to that reported for D. vulgaris, which lost part of the reducing power of its energy sources through hydrogen evolution.
Authors:
A S Traore; C E Hatchikian; J Le Gall; J P Belaich
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of bacteriology     Volume:  149     ISSN:  0021-9193     ISO Abbreviation:  J. Bacteriol.     Publication Date:  1982 Feb 
Date Detail:
Created Date:  1982-04-20     Completed Date:  1982-04-20     Revised Date:  2010-09-10    
Medline Journal Info:
Nlm Unique ID:  2985120R     Medline TA:  J Bacteriol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  606-11     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Calorimetry
Desulfovibrio / growth & development*,  metabolism
Hot Temperature
Kinetics
Lactates / metabolism
Lactic Acid
Pyruvates / metabolism
Pyruvic Acid
Sulfates / metabolism
Chemical
Reg. No./Substance:
0/Lactates; 0/Pyruvates; 0/Sulfates; 127-17-3/Pyruvic Acid; 50-21-5/Lactic Acid
Comments/Corrections

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