CmNAC25 targets CmMYB6 to positively regulate anthocyanin biosynthesis during the post-flowering stage in chrysanthemum ...

• Main Authors: Wang, Yuxi, Wang, Yiguang, Zhou, Li-Jie, Peng, Jialin, Chen, Chuwen, Liu, Shenhui, Song, Aiping, Jiang, Jiafu, Chen, Sumei, Chen, Fadi
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: figshare 2023
• Subjects: Genetics; FOS Biological sciences; Arctic
• Online Access: https://dx.doi.org/10.6084/m9.figshare.c.6871127; https://springernature.figshare.com/collections/CmNAC25_targets_CmMYB6_to_positively_regulate_anthocyanin_biosynthesis_during_the_post-flowering_stage_in_chrysanthemum/6871127

Abstract Background Anthocyanin is a class of important secondary metabolites that determines colorful petals in chrysanthemum, a famous cut flower. ‘Arctic Queen’ is a white chrysanthemum cultivar that does not accumulate anthocyanin during the flowering stage. During the post-flowering stage, the petals of ‘Arctic Queen’ accumulate anthocyanin and turn red. However, the molecular mechanism underlying this flower color change remains unclear. Results In this study, by using transcriptome analysis, we identified CmNAC25 as a candidate gene promoting anthocyanin accumulation in the post-flowering stage of ‘Arctic Queen’. CmNAC25 is directly bound to the promoter of CmMYB6, a core member of the MBW protein complex that promotes anthocyanin biosynthesis in chrysanthemum, to activate its expression. CmNAC25 also directly activates the promoter of CmDFR, which encodes the key enzyme in anthocyanin biosynthesis. CmNAC25 was highly expressed during the post-flowering stage, while the expression level of CmMYB#7, a ...