The monolignol biosynthetic pathway with associated glycosylated products and uridine diphosphate glucosyltransferases (UGT) catalyzing in vitro this glycosylation in Arabidopsis (indicated in blue), in presence of uridine diphosphate (UDP)-glucose (references within the text). UGT72E1 has been localized in the nucleus [32]. PAL-dependent salicylic acid biosynthetic pathway is also represented [33]. Glycosylated molecules are represented in bold. 4CL, 4-coumarate ligase; AIM1, abnormal inflorescence meristem 1; BA2H, benzoic acid 2-hydroxylase; C3H, 4-coumarate 3-hydroxylase; C3′H, 4-coumaroyl shikimate/quinate 3′-hydroxylase; C4H, cinnamate-4-hydroxylase; CAD, cinnamyl alcohol dehydrogenase; CCoAOMT, caffeoyl-CoA 3-O-methyltransferase; CCR, cinnamoyl CoA reductase; COMT, caffeate O-methyltransferase; CSE, caffeoyl shikimate esterase; F5H, ferulate 5-hydroxylase; HCT, hydroxycinnamoyl-CoA:shikimate/quinate hydroxycinnamoyltransferase; PAL, phenylalanine ammonia-lyase.