FIG. 2.

Quantification of cellular matter of the quorum-sensing mutants and the complemented mutants represented by absorbance at 540 nm of crystal violet stain bound to 24-h biofilms cultured on the MBEC assay system. The values shown are the means ± standard errors of the means from three trials, assessing at least five pegs per strain per trial. The asterisks indicate strains that produced significantly less biomass than K56-2 (P < 0.05 by ANOVA and Dunn test). K56-R2(pSLR100) produced significantly greater biomass than K56-R2(pUCP28T) (a), and K56-2 cciI(pRM164) produced significantly less biomass than K56-2 cciI(pUCP26) (b) (P < 0.01 by ANOVA and Dunn test).