Fig. 4

Relative level of expression of sigB, agrA, agrB, lmo2230 and lmo0596 genes for strains: (A) 55 C; (B) 472CC; (C) ATCC 19111. Statistical differences between experimental groups and “no stress” (reference) group were represented by appropriate symbols: *** - p < 0.001; ** - p < 0.01; * - p < 0.05; ns (no significant) - p > 0.05