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

The Plant journal : for cell and molecular biology, 2021-06, Vol.106 (5), p.1414-1430 [Peer Reviewed Journal]

2021 Society for Experimental Biology and John Wiley & Sons Ltd ;2021 Society for Experimental Biology and John Wiley & Sons Ltd. ;Copyright © 2021 John Wiley & Sons Ltd and the Society for Experimental Biology ;ISSN: 0960-7412 ;EISSN: 1365-313X ;DOI: 10.1111/tpj.15245 ;PMID: 33759251

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  • Title:
    Jasmonate induces biosynthesis of anthocyanin and proanthocyanidin in apple by mediating the JAZ1–TRB1–MYB9 complex
  • Author: An, Jian‐Ping ; Xu, Rui‐Rui ; Liu, Xin ; Zhang, Jiu‐Cheng ; Wang, Xiao‐Fei ; You, Chun‐Xiang ; Hao, Yu‐Jin
  • Subjects: Accumulation ; anthocyanin ; Anthocyanins ; apple ; Apples ; Biosynthesis ; jasmonate ; Jasmonic acid ; JAZ ; MYB9 ; proanthocyanidin ; Proanthocyanidins ; Proteins ; Telomeres ; telomere‐binding protein ; transcription regulation
  • Is Part Of: The Plant journal : for cell and molecular biology, 2021-06, Vol.106 (5), p.1414-1430
  • Description: SUMMARY 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. Significance Statement The apple telomere‐binding protein MdTRB1 positively modulates JA‐mediated accumulation of anthocyanin and proanthocyanidin by interacting with MdMYB9 and enhancing the activation activity of MdMYB9 to MdANS and MdANR. 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.
  • Publisher: England: Blackwell Publishing Ltd
  • Language: English
  • Identifier: ISSN: 0960-7412
    EISSN: 1365-313X
    DOI: 10.1111/tpj.15245
    PMID: 33759251
  • Source: IngentaConnect Free/Open Access Journals
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