Figure 5

A model of WRKY TFs function in Catharanthus based on expression data and known roles in A. thaliana. The model depicts CrWRKYs which were either similar to a WRKY with a known role in regulating natural product formation in another species or had transcript level differentially expressed in response to MeJA treatment. Jasmonate has both positive and negative effects on CrWRKY transcript accumulation which is possibly important for fine-tuning TIA and terpene biosynthetic gene expression. The hormones abscisic acid (ABA), ethylene, and gibberellin (GA) also are likely important for regulation of Catharanthus WRKYs. Solid lines depict known regulations and dashed lines indicate hypothetical regulatory interactions.