Figure 6.

Effect of QSIs on biofilm and growth after 24 h (n = 3). (a) QSIs effect on biofilm. Butein (B) inhibited the biofilm formation significantly when compared to the untreated control (C). Data shown as mean ± SD of triplicate wells ** p < 0.01 vs. control; (b). None of the QSIs have affected the growth estimated by medial cloudiness. C is control, C7X, sappanol (S), butein (B) were QSIs and C30 is furanone, the known inhibitor. Data was statistically analyzed and the P-values were estimated by a student’s t-test.