JA-induced FtBPM3 accumulation promotes FtERF-EAR3 degradation and rutin biosynthesis in Tartary buckwheat

文献类型： 外文期刊

第一作者： Ding, Mengqi

作者： Ding, Mengqi;He, Yuqi;Zhang, Kaixuan;Li, Jinbo;Shi, Yaliang;Zhao, Mengyu;Zhou, Meiliang;Ding, Mengqi;Li, Jinbo;Zhao, Mengyu;Meng, Yu;Georgiev, Milen I.;Georgiev, Milen I.

作者机构：

关键词： CUL3 BTB; POZ-MATH E3 ligase; Jasmonate signaling; ERF transcription repressor; Flavonoids biosynthesis; 26S proteasome

期刊名称：PLANT JOURNAL （ 影响因子：7.091； 五年影响因子：8.028 ）

ISSN： 0960-7412

年卷期： 2022 年 111 卷 2 期

页码：

收录情况： SCI

摘要： Buckwheat accumulates abundant flavonoids, which exhibit excellent health-promoting value. Flavonoids biosynthesis is mediated by a variety of phytohormones, among which jasmonates (JAs) induce numerous transcription factors, taking part in regulation of flavonoids biosynthesis genes. However, some transcriptional repressors appeared also induced by JAs. How these transcriptional repressors coordinately participate in JA signaling remains unclear. Here, we found that the disruption of the GCC-box in FtF3H promoter was associated with flavonoids accumulation in Tartary buckwheat. Further, our study illustrated that the nucleus-localized FtERF-EAR3 could inhibit FtF3H expression and flavonoids biosynthesis through binding the GCC-box in the promoter of FtF3H. The JA induced FtERF-EAR3 gene expression while facilitating FtERF-EAR3 protein degradation via the FtBPM3-dependent 26S proteasome pathway. Overall, these results illustrate a precise modulation mechanism of JA-responsive transcription suppressor participating in flavonoid biosynthesis, and will further help to improve the efficiency of flavonoids biosynthesis in Tartary buckwheat.

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