Fig. 6
From: rpoS-mutation variants are selected in Pseudomonas aeruginosa biofilms under imipenem pressure
Pyocyanin production and virulence are increased in rpoS mutants. The production of pyocyanin (A) and cytotoxicity effect against macrophage cells (B) of P. aeruginosa PAO1 wild-type, RpoSP251L, RpoSQ266stop and ΔrpoS. Data are presented as the mean ± s.d. of four biological replicates. Significance was determined using a Student’s t test: *P < 0.05, **P < 0.01, ***P < 0.001