FIG. 6.
Relation between AHLs and PQS in denitrification regulation. NO3− reduction (A), N2O production (B), and N2 production (C) of ΔlasI and ΔpqsA ΔlasI mutants with (+3oC12) or without (−) exogenous 3-oxo-C12HSL. 3-Oxo-C12HSL was added at a final concentration of 1 μM in all experiments. NO3− reduction (D), N2O production (E), and N2 production (F) of ΔpqsA and ΔpqsA ΔrhlI mutants with (+PQS) or without (−) exogenous PQS are shown. PQS was added at a final concentration of 50 μM in all experiments. The data displayed are the means ± standard deviations from three independent experiments.