FIG. 6.

S. gordonii luxS mutant biofilm phenotype is not apparent in BHI medium. (A) Time course (left to right) of biofilm development in medium-conditioned flow cells (10-fold-diluted BHI medium containing 2.4 mM Na₂CO₃) by luxS mutant (luxS) and wild-type (WT) S. gordonii strains. x-z reconstructions of each biofilm are shown below each x-y image. Digital zooms (magnification, 3×) of the lower left corner of each 1-h x-y image are shown as insets. (B) Digital zooms (magnification, 3×) of the center of each 1-h x-z reconstruction. Scale bars, 50 μm.