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FEMS Microbiol Lett. 1994 Apr 15;117(3):249-56.

Establishment of hydrogen-utilizing bacteria in the rumen of the newborn lamb.

Author information

1
Laboratoire de Microbiologie-INRA, CR de Clermont-Ferrand-Theix, Saint-Genès-Champanelle, France.

Abstract

The development of hydrogenotrophic bacteria in the rumen of lambs was investigated by culture and labeling experiments. 14CO2 and 13CO2 incorporation by the rumen microflora of a 24-h-old lamb showed that while there was no labeled methane, double-labeled acetate was formed indicating the presence of hydrogen-dependent acetogenesis. In vitro counts from rumen fluid of 20-h-old lambs confirmed an extensive colonization of acetogenic bacteria while methanogens were absent. Methanogens appeared in the rumen of 30-h-old lambs, and as they developed there was a proportional decrease in the numbers of acetogens, indicating a competition for hydrogen between these two groups. Hydrogen-utilizing sulfate-reducing bacteria, which were established by the 3rd day after birth, did not seem to be affected by this competition.

PMID:
8200502
DOI:
10.1016/0378-1097(94)90567-3
[Indexed for MEDLINE]

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