Fig. 2From: Autoinducer-2 regulates Pseudomonas aeruginosa PAO1 biofilm formation and virulence production in a dose-dependent mannerEffects of AI-2 on P. aeruginosa PAO1 biofilm formation. Biofilm formation was assessed by crystal violet after static incubation at 37 °C for 24 h. Error bars represent SEM and all experiments were performed in triplicate with three independent assays; Triangles denote a statistically significant difference from the control (P < 0.05). Squares denote a statistically significant difference from the 10nM AI-2 group (P < 0.05)Back to article page