Growth characteristics of wild-type strain KF707, KF707ΔR1, KF707ΔR2, and KF707R2+ with salicylate. Cells of strains KF707 (wild type) (⧫), KF707ΔR1 (bphR1 disruptant) (○), KF707ΔR2 (bphR2 disruptant) (▴), and KF707R2+ (KF707ΔR2 carrying pTWF17 containing bphR2) (▪) were cultured on BSM supplemented with 5 mM salicylate as the sole source of carbon. O.D.600 nm, optical density at 600 nm; wt, wild type.