Fig. 2

Synergistic inhibition of phenolic acids on growth of S. cerevisiae. V, H and S represented vanillic acid, p-hydroxybenzoic acid and syringic acid, which at concentrations of 2.1 g/L, 3.5 g/L and 1.2 g/L could cause approximately 30%, 30% and 15% of growth inhibition on the parental strain, respectively. V + H, V + S, H + S and VHS represented two or three kinds of these phenolic acids mixed at the above concentrations, and ½ means half of the concentration of the three phenolic acids. The dashed lines represented if growth inhibitions were theoretically additive. 52.7%, 42.3%, 60.2%, 30.1%