FIG 1.

PQS production is elevated during dispersion. PQS was extracted from biofilm tube reactors grown to each of the five stages of development. Measured PQS production was normalized to micromoles per billion CFU. Error bars represent the standard deviations calculated from at least three biological replicates. Statistical significance was assessed by one-way ANOVA followed by Tukey’s post hoc test. Lowercase letters above the bars represent significance. Differences between bars that do not share a letter are statistically significant (P < 0.05).