NaMYB8-regulated metabolic pathways in N. attenuata plants. The NaMYB8 transcription factor transcriptionally controls the accumulation of CP and DCS metabolites in N. attenuata plants. NaMYB8-dependent genes determined by microarray analysis are enclosed in rectangles. ADC, Arg decarboxylase; C3H, cinnamic acid-3-hydroxylase; C4H, cinnamic acid-4-hydroxylase; CHS, chalcone synthase; 4CL, 4-coumaroyl-CoA:ligase; COMT, caffeic acid O-methyltransferase; HQT, hydroxycinnamoyl-CoA quinate transferase; ODC, Orn decarboxylase; PAL, Phe ammonia lyase; PMT, putrescine methyltransferase; SPS, spermidine synthase.