The dependence of the specific growth rates of the indigenous bacteria in the rice bran and L. delbrueckiiIFO 3202 on pH were shown in Fig. 3. The growth rate of the four strains had the optimum around pH 6. Their specific growth
rates at pH 5.0 (0.065–0.082 h were one third to one fourth lower than that ofL. delbrueckiiIFO 3202 (0.255 h
.