Jasmonate induces biosynthesis of anthocyanin and proanthocyanidin in apple by mediating the JAZ1-TRB1-MYB9 complex

文献类型： 外文期刊

第一作者： An, Jian-Ping

作者： An, Jian-Ping;Zhang, Jiu-Cheng;Wang, Xiao-Fei;You, Chun-Xiang;Hao, Yu-Jin;Xu, Rui-Rui;Liu, Xin

作者机构：

关键词： jasmonate; anthocyanin; proanthocyanidin; JAZ; MYB9; telomere‐ binding protein; transcription regulation; apple

期刊名称：PLANT JOURNAL （ 影响因子：6.141； 五年影响因子：6.629 ）

ISSN： 0960-7412

年卷期：

页码：

收录情况： SCI

摘要： Jasmonate (JA) induces the biosynthesis of anthocyanin and proanthocyanidin. MdMYB9 is essential for modulating the accumulation of both anthocyanin and proanthocyanidin in apple, but the molecular mechanism for induction of anthocyanin and proanthocyanidin biosynthesis by JA is unclear. In this study, we discovered an apple telomere-binding protein (MdTRB1) to be the interacting protein of MdMYB9. A series of biological assays showed that MdTRB1 acted as a positive modulator of anthocyanin and proanthocyanidin accumulation, and is dependent on MdMYB9. MdTRB1 interacted with MdMYB9 and enhanced the activation activity of MdMYB9 to its downstream genes. In addition, we found that the JA signaling repressor MdJAZ1 interacted with MdTRB1 and interfered with the interaction between MdTRB1 and MdMYB9, therefore negatively modulating MdTRB1-promoted biosynthesis of anthocyanin and proanthocyanidin. These results show that the JAZ1-TRB1-MYB9 module dynamically modulates JA-mediated accumulation of anthocyanin and proanthocyanidin. Taken together, our data further expand the functional study of TRB1 and provide insights for further studies of the modulation of anthocyanin and proanthocyanidin biosynthesis by JA.

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