Fig. 3.

A model for the process of Del elimination in the white flowers of M. armeniacum. When DFR is suppressed, the substrates used for Del synthesis are then available for synthesis of myricetin and kaempferol. Moreover, an increase of flavonol production occurs through the up-regulation of FLS, furthering the process of blue pigmentation elimination in the white flowers of M. armeniacum. The global output from the minimal anthocyanin subnetwork in flowers of M. armeniacum was considered to be 100% and was used to define the relative level of each product. The black boxes indicate the genes or the compounds which had a higher relative abundance in white flowers of M. armeniacum than that in blue flowers. The grey boxes indicate the genes or the compounds which had a lower abundance in white flowers than that in blue flowers. CHI, chalcone isomerase; CHS, chalcone synthase; Cy, the global output from the minimal cyanidin subnetwork; DFR, dihydroflavonol 4-reductase; F3H, flavanone 3-hydroxylase; F3′5′H, flavonoid 3′5′-hydroxylase; FLS, flavonol synthase. (This figure is available in colour at JXB online.)