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Appl Environ Microbiol. 1983 Apr;45(4):1310-5. doi: 10.1128/aem.45.4.1310-1315.1983.

Methanogenesis from methanol and methylamines and acetogenesis from hydrogen and carbon dioxide in the sediments of a eutrophic lake.

Applied and environmental microbiology

D R Lovley, M J Klug

Affiliations

  1. Kellogg BiologĂ­cal Station, Michigan State University, Hickory Corners, Michigan 49060, and Department of Microbiology and Public Health, Michigan State University, East Lansing, Michigan 48824.

PMID: 16346271 PMCID: PMC242456 DOI: 10.1128/aem.45.4.1310-1315.1983

Abstract

C-tracer techniques were used to examine the metabolism of methanol and methylamines and acetogenesis from hydrogen and carbon dioxide in sediments from the profundal and littoral zones of eutrophic Wintergreen Lake, Michigan. Methanogens were primarily responsible for the metabolism of methanol, monomethylamine, and trimethylamine and maintained the pool size of these substrates below 10 muM in both sediment types. Methanol and methylamines were the precursors for less than 5 and 1%, respectively, of the total methane produced. Methanol and methylamines continued to be metabolized to methane when the sulfate concentration in the sediment was increased to 20 mM. Less than 2% of the total acetate production was derived from carbon dioxide reduction. Hydrogen consumption by hydrogen-oxidizing acetogens was 5% or less of the total hydrogen uptake by acetogens and methanogens. These results, in conjunction with previous studies, emphasize that acetate and hydrogen are the major methane precursors and that methanogens are the predominant hydrogen consumers in the sediments of this eutrophic lake.

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