FIG 4.

Growth (A), normalized gfp expression (B), and normalized pyoverdine production (C) of the P. aeruginosa PAO1 biosensor strain carrying pvdA-gfp in ABTGC medium containing various concentrations of iberin. Every 30 min, growth, gfp fluorescence, and pyoverdine production were measured using OD₆₀₀ values and relative fluorescence units (RFU), respectively. Normalization was calculated as RFU divided by OD₆₀₀. The experiments were performed in triplicate; only representative ones are shown.