FIG 1.

Examples of nutrient dilution series with the P. aeruginosa lasB reporter strain. Progressive 2-fold dilutions of C (a) and P (b) were carried out in minimal medium batch cultures with glutamate as the sole C source. Bars indicate fold changes from β-galactosidase expression in undiluted medium (left y axis). Triangles indicate the OD₆₀₀ (right y axis). Fold change values were normalized to OD₆₀₀ values. Values are means for three independent biological replicates. Error bars indicate standard deviations of the means.