Expression patterns and activation overview of TFs and TPSs. Putative positive interaction of the respective SlTPS promoters by transcription factors (a) SlMYC1, (b) SlWRKY73 and (c) SlEOT1 is indicated by a colored box that represents the tissue in which they are co-expressed. Expression in the various tissues is indicated by +++, ++, +, +/− and -- according to Q-RT-PCR values. Darker shaded boxes indicate a stronger transient activation of the TPS promoter by the TF in N. benthamiana leaves. EOT1; Expression of Terpenoids 1 .