Transactivation of terpene synthase promoters by SlMYC1 and SlWRKY73 in N. benthamiana leaves . Normalized GUS activity after co-infiltration with A. tumefaciens harboring the (a) 35S:WRKY73 or (b) 35S:MYC1 effector construct and various promoter:GUS reporter constructs. The 35S:SlEOT1 and 35S:RFP effector constructs were used as positive and negative control, respectively. The bars represent the obtained mean values and the error bars the standard error (n = 3). RFP; red fluorescent protein. Letters indicate significant differences (ANOVA, P < 0.05 according to Tuckey’s B posthoc test). Representative results from three experiments are shown.