FIGURE 4.

Degradation kinetics of 3-oxo-C₈-HSL by the R. erythropolis R138 wild-type, ΔqsdR or the complementing strains. Dosage was performed by a colorimetric method in the culture supernatant after centrifugation. Data are the mean ± standard deviation of three independent experiments. Statistical analyses were performed using non-parametric Mann–Whitney tests (two tailed). For each incubation time, ^∗ indicates a significant difference in the 3-oxo-C₈-HSL quantity in the presence of the ΔqsdR mutant or the complementing strains (p-value < 0.05) relative to that observed in the presence of the wild-type strain. ns mean no significant difference.