FIG 2.

Growth and stationary-phase survival of rifampin-resistant strains in minimal medium. Growth (A to E, left) and stationary-phase survival (A to E, right) curves for mutants and the wild-type strain in MCDA medium with increasing sodium concentrations ranging from 21.6 mM to 121.6 mM. The experiments were performed in triplicate with three independent cultures for each medium, and statistical significance was examined by the Student t test. Results are indicated as means ± SDs. Asterisks indicate statistical significance (*, P < 0.05; **, P < 0.01; ***, P < 0.001).