Fig. 5

Effects of the addition of β-ionone standard in the production of volatile compounds (A β-ionone and B β-cyclocitral) during the growth times of toxin-producing (LTPNA 08) and non-producing (LTPNA 01) strains of M. aeruginosa. Different letters represent significant differences over the growth time in each strain and condition, control (without the addition of β-ionone) or treatment (with the addition of β-ionone) (for β-ionone in LTPNA 01: Kruskal–Wallis One Way Analysis of Variance on Ranks followed by Tukey post-test, p < 0.05; for β-ionone in LTPNA 08: One Way Analysis of Variance followed by Tukey post-test, p < 0.05; and for β-cyclocitral: Two Way Analysis of Variance followed by Tukey post-test, p < 0.05). * Represents a significant difference between the conditions (control and treatment) for each growth time (Student t-test, p < 0.05)