LYST and infection: After infection by D. gregaria, genes coding for several key enzymes involved in the regulation of secondary metabolite processes and biosynthesis, such as CHS (chalcone synthase), chalcone and stilbene synthase (PAYT009441.1), F3H (flavanone 3-hydroxylase), and DFR (dihydroflavonol 4-reductase), were significantly upregulated in MYB90/bHLH1-OE lines compared with in control plants (Figures S4A–C).