[Use of glucose and cellobiose by 3 strains of Fibrobacter succinogenes]

F succinogenes strains S85, 128 and 095 were compared with respect to their growth using glucose and/or cellobiose as the carbon and energy substrate(s) and their capacities to degrade cellulose. The growth rate of F succinogenes strain S85 was the same using glucose or cellobiose, whereas the growth rates of strains 128 and 095 were about thrice the rate when using cellobiose. Strain S85 could simultaneously use glucose and cellobiose, while strains 128 and 095 tended to use preferentially glucose then cellobiose in a mixture of the 2 sugars. Their capacities to degrade cellulose were equivalent.