Fig 4. PCA and PYO produced by P. aeruginosa PAO1 and its derivatives in GA medium.

PCA (A) and PYO (B) were biosynthesized by the wild-type strain PAO1 (solid circle) and its derivatives, the single-deletion mutant Δphz1 (solid square) and Δphz2 (solid triangle), the double-deletion mutant Δphz1phz2 (solid diamond), the Δphz1 mutant harboring pME10Z1 (open square) and the Δphz2 mutant containing pME10Z2 (open triangle) in GA medium. All experiments were performed in triplicate, and each value was presented as the average ± standard deviation.