Table 2.
Strain | Minimal inhibitory concentration | Hyperosmotic | Hypo-osmotic | ||
---|---|---|---|---|---|
SDS (% w/v) | DOC (% w/v) | Ethanol (%v/v) | stress (%)* | stress (%)* | |
Rt24.2 | 0.05 ± 0.005 | 0.10 ± 0.005 | 4.5 ± 0.28 | 77.1 | 51.6 |
Rt2440 | 0.02 ± 0.003† | 0.030 ± 0.003† | 2.3 ± 0.25† | 11.5† | 13.0† |
Rt2441 | 0.02 ± 0.002† | 0.030 ± 0.003† | 3.0 ± 0.28 | 11.9† | 15.2† |
Rt2472 | 0.015 ± 0.002† | 0.025 ± 0.002† | 2.6 ± 0.28† | 10.4† | 13.3† |
* - Strains were grown in TY supplemented with 85 mM NaCl (hyperosmotic) or GYM medium (hypo-osmotic) supplemented with Dilworth's vitamins for 2 days, and the growth was compared with that of strains grown in TY medium. OD600 values were measured. Percentage growth values are the mean and SD from three independent trials.
† Difference between the wild type and the rosR mutants is statistically significant at P < 0.05 (Student's t test).