Fig. 2

Flavonoid composition obtained by UPLC from six different coloring stages (S1, S2, S3, S4, S5, and S6). Fig. 2a showed the content of anthocyanins. Dp3G contain the content of delphinidin 3-O-β-galactopyranoside (Dp3Gal) and delphinidin 3-O-(6″-O-acetyl-β-glucopyranoside) (Dp3acetylGlc); Dp3′G contain the content of delphinidin 3′-O-(2″-O-galloyl-β-galactopyranoside) (Dp3′galloylGal) and delphinidin 3′-O-(2″-O-galloyl-6″-O-acetyl-β-galactopyranoside) (Dp3′galloyl-acetylGal). Fig. 2b indicated the content of flavonols. Km contain the content of kaempferol 3-(3″-acetylrhamnoside) and kaempferol 3-O-α-L-(3″-O-malonyl)-rhamnopyranoside. Qu contain the content of quercetin 7-O-galactoside, quercetin 3-O-α-L-rhamnopyranoside, quercetin 3-O-β-D-(3″-O-acetyl)-α-L-rhamnopyranoside and quercetin the content of 3-O-α-L-(3″-O-malonyl)-rhamnopyranoside. My contain the content of myricetin 3-O-β-D-galactopyranoside, myricetin 3-O-α-L-rhamnopyranoside, myricetin 3-O-α-L-(3″-O-acetyl)-rhamnopyranoside, myricetin 3-O-α-L-(2″-O-acetyl)-rhamnopyranoside, myricetin 3-O-α-L-(3″-O-malonyl)-rhamnopyranoside and myricetin 3-O-(2″-O-galloyl-6″-O-malonyl-β-galactopyranoside)