FIG. 2.

Behavioral responses of P. aeruginosa PAO1 wild-type (WT), aer, aer PA2652, and PA2652 mutant strains as assayed in a mineral medium swarm plate that contained 2 mM malate as the sole carbon and energy source. Each quadrant of the plate was stab inoculated with a single colony, and the plate was incubated for 16 h at 37°C.