Isolated strains were grown for 16 h in MRS broth at 30 C
without shaking and then inoculated (1%, v/v) into 50 ml of fresh
MRS broth with different initial pH (2e9) and salt concentration
(6.5 and 8%, w/v). Inoculated cultures were incubated for 48 h or
96 h and the OD600 values of cultures were measured during
cultivation. Strains were also grown in regular MRS broth at
different temperature