Fig. 11

A referred model for the process of anthocyanin synthesis in the purple flowers of C and cream flowers of M. The crucial isoform IDs are indicated at the side of each gene. Upstream of M, PAL and 4CL are suppressed, and an increasing branch of isoflavone biosynthesis regulated by CHS and CHR is dominant. Furthermore, the up-regulation of F3H/FLS, F3’H, and F3’5’H causes an increase in other flavonoid compounds, such as myricetin and kaempferol, further reducing the anthocyanin synthesis. Finally, the low expression level of DFR accompanied with the low abundance of UFGT might disrupt the anthocyanin synthesis, leading to the formation of the cream color