Effects of glycerol on the growth,adhesion, and cellulolytic activity of rumen cellulolytic bacteria and anaerobic fungi |
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| Authors: | Velérie Roger Dr Gérard Fonty Cécile Andre Philippe Gouet |
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| Institution: | (1) Laboratory of Microbiology, INRA, C.R. Saint-Genes-Champanelle, 63122 Saint-Genes-Champanelle, France;(2) Section of Biological Sciences, Department of Research, U.F.R. Odontology, Clermont-Ferrand, France;(3) Laboratory of Comparative Biology of Protistes, CNRS, Aubiere, France |
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| Abstract: | The effect of glycerol on the growth, adhesion, and cellulolytic activity of two rumen cellulolytic bacterial species,Ruminococcus flavefaciens andFibrobacter succinogenes subsp.succinogenes, and of an anaerobic fungal species,Neocallimastix frontalis, was studied. At low concentrations (0.1–1%), glycerol had no effect on the growth, adhesion, and cellulolytic activity of the two bacterial species. However, at a concentration of 5%, it greatly inhibited their growth and cellulolytic activity. Glycerol did not affect the adhesion of bacteria to cellulose. The growth and cellulolytic activity ofN. frontalis were inhibited by glycerol, increasingly so at higher concentrations. At a concentration of 5%, glycerol totally inhibited the cellulolytic activity of the fungus. Thus, glycerol can be added to animal feed at low concentrations. |
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