The combination of DNA methylation and positive regulation of anthocyanin biosynthesis by MYB and bHLH transcription factors contributes to the petal blotch formation in Xibei tree peony.

ABSTRACT: Xibei tree peony is a distinctive cultivar group that features red-purple blotches in petals. Interestingly, the pigmentations of blotches and non-blotches are largely independent of one another. The underlying molecular mechanism had attracted lots of attention from investigators, but was still uncertain. Our present work demonstrates the factors that are closely related to blotch formation in Paeonia rockii 'Shu Sheng Peng Mo'. Non-blotch pigmentation is prevented by the silencing of anthocyanin structural genes, among which PrF3H, PrDFR, and PrANS are the three major genes. We characterized two R2R3-MYBs as the key transcription factors that control the early and late anthocyanin biosynthetic pathways. PrMYBa1, which belongs to MYB subgroup 7 (SG7) was found

SUBMITTER: Zhu J 

PROVIDER: S-EPMC10327543 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature