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Attempts to inhibit ruminal methanogenesis by blocking pyruvate oxidative decarboxylation

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The inhibition of pyruvate oxidative decarboxylation as a means of decreasing ruminal methanogenesis in vitro was studied. In the first experiment, the addition of adenosine and adenine (with and without ribose) to ruminal batch cultures did not decrease methanogenesis. In the second experiment, the addition of oxythiamin decreased methanogenesis by 23%. In the third experiment, three pyruvate derivatives did not inhibit methanogenesis, although hydroxypyruvate improved organic matter fermentation from 57.8% to 64.2%. The additives did not seem to inhibit pyruvate oxidative decarboxylation.Key words: methane, inhibition, rumen, pyruvate decarboxylation, thiamin.

Nous avons étudié l'inhibition de la décarboxylation oxydative du pyruvate comme moyen de réduire la méthanogénèse ruminale in vitro. Dans la première expérience, l'ajout d'adénosine et d'adénine, avec ou sans ribose, à des cultures ruminales en discontinu n'a pas diminué la méthanogénèse. Dans la seconde expérience, l'ajout d'oxythia mine a diminué la méthanogénèse de 23 %. Dans la troisième expérience, trois dérivés du pyruvate n'ont pu inhiber la méthanogénèse, bien que l'hydroxypyruvate a amélioré la fermentation des matières organiques de 57,8 % à 64,2 %. Les additifs n'ont vraisemblablement pas inhibé la décarboxylation oxydative du pyruvate.Mots clés : méthane, inhibition, rumen, décarboxylation du pyruvate, thiamine.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: 2003-10-01

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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