The branch of the flavonoid pathway for the
synthesis of flavones in maize. Enzyme abbreviations: CHS, chalchone
synthase; CHI, chalcone isomerase; F3H, flavanone-3-hydroxylase; DFR,
dihydroflavanone reductase; F3′H, flavanone-3′-hydroxylase; FNS,
flavone synthase; RT, rhamnosyl transferase.