Figure 2

Analysis of total bacterial numbers (cells/ml) in S0011 seawater in the presence of 0.1 nM (FIG 2A) or 1000 nM (FIG 2B) of siderophore DEF, synthetic HSLs, DEF plus HSL respectively with DAPI staining counting method during 7 days incubation at 30°C. (filled square) without addition; (circle) with the addition of 0.1 nM DEF, (triangle) with the addition of 0.1 nM 3OC6-HSL, (filled triangle) with the addition of 0.1 nM DEF plus 0.1 nM 3OC6-HSL (Fig 2A), (square) with the addition of 0.1 nM C8-HSL (Fig 2B), (filled square) with the addition of 0.1 nM DEF plus 0.1 nM C8-HSL. Each points represents the mean coaggregration value from three separate measurements.