FIG. 4.

Effects of hydroxycinnamates on wild-type strain ADP1 and ΔhcaA1 strain ADP8085. Cells were grown at the expense of succinate with decreasing amounts of the three hydroxycinnamates added. For each set of data, OD₆₀₀ was measured when succinate-grown cells had reached the late exponential to early stationary phase. The initial cell concentration was 10⁷ cells ml⁻¹, which corresponded to an OD₆₀₀ of 0.03. The averages for three independent trials are shown with their standard deviations (error bars).