The expression of hrpN of Dickeya dadantii 3937 (Ech3937) in MM and MM supplemented with different amount of TCA and SA respectively.

aMinimal medium (MM) alone and MM supplemented with different concentrations of t-cinnamic acid (TCA) or salicylic acid (SA).bThe promoter activities of hrpN were measured at 12 and 24 h of growing in the media. The fluorescence intensities were collected, including average GFP fluorescence intensity of total bacterial cells (Total), average GFP fluorescence intensity of GFP expressing bacterial cells (GFP+), and the percentage of GFP expressing bacterial cells of the total bacterial cells (GFP+%). Three replicates were used in this experiment. The value (Mean Fluorescence Intensity) is present as the average of three replicates with standard deviation. The GFP intensities of Ech3937 (pAT) grown in MM were 2.2��0 and 3.4��0.1 at 12h and 24h respectively.