Table 2 Comparison of specific growth rates among the wild type and three mutants in the MRS medium supplemented with varying concentrations of lactic acid
Strains | Specific growth rates (1/h) | |||||
|---|---|---|---|---|---|---|
0 (g/L) | 15 (g/L) | 30 (g/L) | 45 (g/L) | 60 (g/L) | 70 (g/L) | |
Wild type | 0.35 ± 0.02 | 0.26 ± 0.01 | 0.14 ± 0.01 | 0.08 ± 0.02 | 0.06 ± 0.02 | 0.05 ± 0.00 |
LMS50 | 0.33 ± 0.01 | 0.27 ± 0.01 | 0.23 ± 0.01 a | 0.16 ± 0.01 | 0.10 ± 0.01 | 0.10 ± 0.01 |
LMS60 | 0.38 ± 0.02 | 0.27 ± 0.01 | 0.22 ± 0.01 | 0.15 ± 0.01 | 0.11 ± 0.02 | 0.11 ± 0.01 |
LMS70 | 0.35 ± 0.01 | 0.27 ± 0.01 | 0.18 ± 0.01 | 0.14 ± 0.02 | 0.12 ± 0.01 | 0.12 ± 0.01 |