Fig. 2.

Effect of oxidative stress on R. solanacearum strain growth in minimal medium. Growth of wild-type K60 carrying empty vector pUFJ10 (diamonds), oxyR mutant K2690 carrying empty vector pUFJ10 (squares), and K2690 complemented with pUFJ10::oxyR (triangles) strains in the absence (empty symbols) and presence (filled symbols) of 250 μM H₂O₂ (A) or 5 μM paraquat (B) is shown. Results are the average of two independent experiments, with two replicates for each treatment in each experiment; bars represent standard errors of the means. An asterisk indicates a statistically significant difference according to Student's t test (P < 0.05).