Effect of Eubacterium limosum, a ruminal hydrogenotrophic bacterium, on the degradation and fermentation of cellulose by 3 species of rumen anaerobic fungi.
The degradation and fermentation of cellulose filter paper were studied in axenic cultures of 3 species of rumen anaerobic fungi, Neocallimastix frontalis, Piromyces communis and Caecomyces communis, and in cocultures containing 1 of these fungal strains and Eubacterium limosum, a hydrogenotrophic rumen bacterial species. When E limosum was introduced into fungal cultures a slight decrease in fungal cellulolytic activity was observed. The end products of the fermentation of cellulose found in the cocultures were different from those found in the fungal monocultures. E limosum used formate and part of the hydrogen produced by the fungi and probably created a shift in the metabolism of the fungi resulting in a reduction of lactate and ethanol production.
Bernalier
A
A
Laboratoire de Microbiologie, INRA, Saint-Genès-Champanelle, France.
Fonty
G
G
Bonnemoy
F
F
Gouet
P
P
D000693:Anaerobiosis; D000818:Animals; D002482:Cellulose / Q000378:metabolism*; D005051:Eubacterium / Q000302:isolation & purification / Q000378:metabolism*; D005285:Fermentation; D005658:Fungi / Q000302:isolation & purification / Q000378:metabolism*; D012417:Rumen / Q000382:microbiology*; D012756:Sheep / Q000382:microbiology; D013045:Species Specificity
D002482:Cellulose