Bacterial growth and mexAB-oprM transcript abundance in P. syringae pv. phaseolicola 1448A, P. syringae pv. syringae B728a, and P. syringae pv. tomato DC3000. For liquid cultures, bacteria were grown in HSC medium and KB medium. (A) Growth kinetics of 1448A in HSC and KB media. (B) Quantitative RNA dot blot analysis for mexAB-oprM mRNA abundance in 1448A grown in HSC and KB media. (C) Growth kinetics of B728a in HSC and KB media. (D) Quantitative RNA dot blot analysis for mexAB-oprM mRNA abundance in B728a grown in HSC and KB media. (E) Growth kinetics of DC3000 in HSC and KB media. (F) Quantitative RNA dot blot analysis for mexAB-oprM mRNA abundance in DC3000 grown in HSC and KB media. The relative mRNA level was related to the highest mean value determined for a strain, which was defined as 100%. The data show the means and standard errors of two experiments with three replicates. OD600nm, optical density at 600 nm.