Effects of RCS scavengers, carnosine and pyridoxamine, on MeJA-induced stomatal closure in tobacco and Arabidopsis. Effects of 1 mM carnosine (A) and 0.5 mM pyridoxamine (B) on MeJA-induced stomatal closure in WT tobacco. Effects of 1 mM carnosine (C) and 0.5 mM pyridoxamine (D) on MeJA-induced stomatal closure in Arabidopsis. Averages from three independent experiments (60 stomata per bar) are shown. Error bars represent standard error of mean. Differences among treatments were analyzed by Tukey’s test: P < 0.05.