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Fig. 8 | Biotechnology for Biofuels and Bioproducts

Fig. 8

From: An R3-MYB repressor, BnCPC forms a feedback regulation with MBW complex to modulate anthocyanin biosynthesis in Brassica napus

Fig. 8

Proposed working model of BnCPC regulating anthocyanin biosynthesis in rapeseed. A Under non-inducible conditions (e.g., dark or non-stress conditions), BnPAP1 was lowly expressed and BnCPC was continuously induced to repress the expression of anthocyanin biosynthetic genes (e.g., BnDFR) by inhibiting MBW formation, thereby repressed anthocyanin accumulation. B Under inducible conditions (e.g., cold and other stress conditions), BnPAP1 was induced and formed MBW complexes to activate transcription of anthocyanin biosynthetic genes (e.g., BnDFR, BnLDOX, and BnUF3GT) and promote anthocyanin accumulation. BnCPC was up-regulated under stress conditions, and competed with BnPAP1 to interact with BnTT8/BnEGL3, thus affecting the MBW complex formation. BnCPC also inhibited the MBW complex-induced BnCPC activity, and formed a feedback loop with MBWs to regulate anthocyanin biosynthesis. Arrows and blunt arrows represent positive and negative regulation, respectively

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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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