Figure 1.

Phenylpropanoid metabolism. Abbreviations: PAL, phenylalanine ammonia-lyase; C4H, cinnamate 4-hydroxylase; 4CL, 4-coumaroyl:CoA-ligase; C3H, p-coumarate 3-hydroxylase; HCT, hydroxycinnamoyl Co A shikimate hydroxycinnamoyl transferase; HQT, hydroxyl-cinnamoyl CoA quinatehydroxycinnamoyl transferase; UGCT, UDP glucose:cinnamateglucosyl transferase; HCGQT, hydroxycinnamoylglucose:quinatehydroxycinnamoyl transferase, CHS, chalcone synthase; CHI, chalconeisomerase; F3H, flavanone 3-hydroxylase; F3'H, flavonoid 3' hydroxylase; F3'5'H, flavonoid 3'5' hydroxylase; FLS, flavonol synthase; DFR, dihydroflavonol 4-reductase; ANS, Anthocyanin synthase; UFGT, UDP glucose:flavonolglucosyl transferase; ART, anthocyanin rhamnosyltransferase; ACT, anthocyanin acyltransferase, UF5GT, UDPG flavonoid 5-O-glucosyltransferase; A3'MT, anthocyanin 3'-methyltransferase; A3'5'MT, anthocyanin 3',5'-methyltransferase. CyCRG, PeCRG, PlCRG, PtCRG and MaCRG are coumaryolrutinosideglucosides of cyanidin, peonidin, pelargonidin, petunidin, and malvidin respectively. (Boss, Davies & Robinson, 1996, Gutha et al., 2010, Kroon, Souer, De Graaff, Xue, Mol&Koes, 1994, Niggeweg, Michael & Martin, 2004).