Effect of cinnamaldehyde and 2-NO
-cinnamaldehyde on the bioluminescence of wild type Vibrio harveyi BB120 and the different Vibrio harveyi QS mutants. The percentage of bioluminescence of the Vibrio harveyi wild type BB120 and the mutants MM30, JAF553, JAF483 and BNL258 with 100 μM cinnamaldehyde (white bars) or 100 μM 2-NO2-cinnamaldehyde (black bars) are presented. Measurements were performed 6 h after the addition of the compounds. Bioluminescence of the control (without addition of compound) was set at 100% and the response for the other samples were normalised accordingly. The error bars represent the standard deviation.