ZeMYB9 regulates cyanidin synthesis by activating the expression of flavonoid 3'-hydroxylase gene in Zinnia elegans.

ABSTRACT: Petal color in Zinnia elegans is characterized mainly by anthocyanin accumulation. The difference in the content of anthocyanins, especially cyanidins, affects petal coloration in Z. elegans, but the underlying regulatory mechanism remains elusive. Here, we report one R2R3-MYB transcription factor from subgroup 6, ZeMYB9, acting as a positive regulator of anthocyanin accumulation in Z. elegans. Up-regulated expression of ZeMYB9 and flavonoid 3'-hydroxylase gene (ZeF3'H) was detected in the cultivar with higher cyanidin content. ZeMYB9 could specifically activate the promoter of ZeF3'H, and over-expression of ZeMYB9 induces much greater anthocyanin accumulation and higher expression level of anthocyanin biosynthetic genes in both petunia and

SUBMITTER: Qian J 

PROVIDER: S-EPMC9623174 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature