Figure 1.

Relationship of Methylcinnamate Biosynthesis to the Production of Other Phenylpropanoid Pathway–Derived Volatiles in Basil Glandular Trichomes.

Enzyme abbreviations are as follows: PAL, Phe ammonia lyase; CCMT, p-coumarate/cinnamate carboxyl methyltransferase; C4H, cinnamate 4-hydroxylase; 4CL, 4-coumarate:CoA ligase; C3H, p-coumarate 3-hydroxylase; CST, p-coumaroyl shikimate transferase; CS3′H, p-coumaroyl 5-O-shikimate 3′-hydroxylase; CCOMT, caffeoyl-CoA O-methyltransferase; CCR, cinnamoyl-CoA reductase; CAD, cinnamyl alcohol dehydrogenase; CAAT, coniferyl alcohol acetyl transferase; EGS, eugenol (and chavicol) synthase; EOMT, eugenol O-methyltransferase; CVOMT, chavicol O-methyltransferase.