Abstract
The influence of environmental pH on the regulation of glucose catabolism by Lactobacillus reuteri was examined in anaerobic batch cultures. Under acidic conditions both glucose consumption and end‐products formation were low. Maximum biomass was reached at pH 5·0, with a specific growth rate of µ= 0·78 h‐1. The shift in pH values from 4.3 to 6.5 reflected an increase in glucose uptake as well as in the yield (Yp/x) of acetate, lactate and ethanol after 12 h of incubation. Ethanol was the major metabolite produced at all pH values assayed.
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