数字农科院2.0

The molecular mechanism of transforming red light signal to (E)-β-caryophyllene biosynthesis in Arabidopsis

文献类型： 外文期刊

作者： Chuanjia Xu;Xin Wang;Malakkhanim Mehraliyeva;Jia Sun;Fangfang Chen;Changfu Li;Zhengqin Xu;Nan Tang;Yansheng Zhang

作者机构：

关键词： light; MYC2; Caryophyllene

期刊名称： Physiologia Plantarum

ISSN： 0031-9317

年卷期： 2025 年 177 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： It is known that red light irradiation enhances the biosynthesis of (E)-β-caryophyllene in plants. However, the underlying mechanism connecting red light to (E)-β-caryophyllene biosynthesis remains elusive. This study reveals a molecular cascade involving the phyB-PIF4-MYC2 module, which regulates (E)-β-caryophyllene biosynthesis in response to the red light signal in Arabidopsis thaliana. In this module, phyB positively regulates (E)-β-caryophyllene biosynthesis under red light, whereas PIF4 negatively regulates it; both regulations require the involvement of MYC2, a transcription factor that can bind directly to the promoter of the TPS21 gene which encodes (E)-β-caryophyllene synthase. Importantly, protein–protein and protein-DNA interaction assays show that PIF4 reduces the binding affinity of MYC2 to the TPS21 promoter through direct interaction with MYC2. We propose that the phyB-PIF4-MYC2 module represents a universal mechanism linking red light to sesquiterpene biosynthesis in plants.

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