DISACCHARIDE PREFERENCE OF AN AEROBIC CELLULOLYTIC BACTERIUM, CELLVIBRIO GILVUS N. SP

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Abstract
An aerobic cellulolytic bacterium, Cellvibrio gilvus n. sp., has been isolated, described, and classified. Cellobiose but not glucose is the hydrolytic end product of cellulolysis by an apparently constitutive cellulase system. The requirement for yeast extract is replaceable by a mixture of B-vitamins and amino acids. Filterable forms seem to occur. The preference of the culture for cellobiose over glucose as an energy source for growth seems to be related to differences in the relative rates of assimilation, different pH optima, and different mechanism of fermenting the two sugars.