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Impact of iron availability on biofilm formation. Results are shown for planktonic cell growth (A550; ▪) and biofilm formation (A550 of crystal violet as an indirect measure of biofilm biomass; ▴) by P. aeruginosa K1120 as a function of FeCl3 supplementation of an Fe-limited minimal medium. Cells/biofilms were grown for 12 h at 37°C. Error bars represent the standard errors of the means for a representative assay performed in triplicate.
