Fig. 1.

Schematic representation of the crosstalk between sucrose and hormone signaling pathways in the regulation of the expression of early (EBG) and late (LBG) anthocyanin biosynthesis genes through the activation of the MYB-bHLH-WD40 (MBW) transcription complex and down-regulation of MYBL2 expression. The point(s) of convergence of the photosynthetic electron transport (PET) dependent light, sucrose, CK, and ethylene signaling pathways leading to transcriptional regulation of the MBW complex remain elusive. DELLA-independent GA regulation of PAP1 expression is not shown. The HY5-mediated light signaling pathway directly regulates the expression of EBGs and LBGs at the transcriptional level. Blue and red lines pointing to anthocyanin biosynthesis genes (EBGs and LBGs) and MBW complex represent transcriptional and translational control, respectively.