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- W3017046975 abstract "Abstract Background R2R3-MYB transcription factors (TFs) play important roles in plant growth and development, and response to biotic and abiotic stresses. However, their regulatory mechanisms in wound-induced anthocyanin biosynthesis in woody plants are largely unknown. Results In this work, we report that expression of anthocyanin biosynthesis genes ( ABGs ) were activated by PdMYB118, a MYB TF encoding gene from Populus deltoids , and the activation of PdMYB118 was significantly enhanced by PdTT8, a bHLH protein, through its direct interaction with PdMYB118. PdMYB118 and some ABGs were evidently induced by wound induction and methyl jasmonate (MeJA) treatment. Overexpression of PdMYB118 promoted anthocyanin accumulation in transgenic poplar upon wound induction. Furthermore, a poplar JASMONATE ZIM-domain (JAZ) protein, PtrJAZ1, repressed the transcriptional function of PdMYB118/PdTT8 complex by binding to PdTT8, and wound stimulated the biosynthesis of jasmonic acid (JA) and the degradation of PtrJAZ1. Conclusions Based on these observations, we proposed that PtrJAZ1 degradation triggered the expression of ABGs , leading to increased biosynthesis of anthocyanins in the wounded leaves of transgenic poplar. Therefore, our findings not only illustrate the crucial role of PdMYB118 in wound-induced anthocyanin biosynthesis in poplar, but also provide a molecular basis for the genetic engineering of colorful tree species." @default.
- W3017046975 created "2020-04-24" @default.
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- W3017046975 date "2020-04-20" @default.
- W3017046975 modified "2023-10-16" @default.
- W3017046975 title "MYB transcription factor PdMYB118 directly interacts with bHLH transcription factor PdTT8 to regulate wound-induced anthocyanin biosynthesis in poplar" @default.
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- W3017046975 doi "https://doi.org/10.1186/s12870-020-02389-1" @default.
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