Fig. 2
From: Fruit ripening: dynamics and integrated analysis of carotenoids and anthocyanins
Regulation of chlorophyll degradation in fruit ripening. The figure describes the regulatory mechanisms (growth hormones and light) which signal specific transcription factors followed by activation of genes which initiate chlorophyll degradation. Ethylene signaling the following TFs: EIN3(ethylene insensitive 3),0RE1(a NAC transcription factor), CitERF13 (citrus ethylene response factor 13), ABA signaling the following TFs: ABI3, AB15(abscisic acid insensitive 3 and 5), EEL (b ZIP family), ABF2/3/4 (ABA)-responsive element (ABRE)-binding transcription factors), jasmonic acid signaling the following TF’s: MYC2 (basic-helix-loop-helix (bHLH), MYC3, MYC4, ANAC019/055/072(a NAC transcription factor). The TFs regulated by light signaling are: PIF4 (phytochrome-interacting factor 4) and PIF5 (phytochrome-interacting factor5). The binding of the above stated transcription factors to the gene promoter sites (genes mentioned in the oval shape) enhances their activity and function. The genes mentioned are SGR (stay green), NYC1(non-yellow colouring1), NYE1 (non yellowing1), NYE2, NYC1-LIKE (NOL) and PAO. CitERF13 have been reported to bind to the promoter of PPH, respectively