The Roles of the PSEUDO-RESPONSE REGULATORs in Circadian Clock and Flowering Time in Medicago truncatula .

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    • Source:
      Publisher: MDPI Country of Publication: Switzerland NLM ID: 101092791 Publication Model: Electronic Cited Medium: Internet ISSN: 1422-0067 (Electronic) Linking ISSN: 14220067 NLM ISO Abbreviation: Int J Mol Sci Subsets: MEDLINE
    • Publication Information:
      Original Publication: Basel, Switzerland : MDPI, [2000-
    • Subject Terms:
    • Abstract:
      PSEUDO-RESPONSE REGULATORs ( PRRs ) play key roles in the circadian rhythms and flowering in plants. Here, we identified the four members of the PRR family in Medicago truncatula , including MtPRR9a , MtPRR9b , MtPRR7 and MtPRR5 , and isolated their Tnt1 retrotransposon-tagged mutants. They were expressed in different organs and were nuclear-localized. The four MtPRRs genes played important roles in normal clock rhythmicity maintenance by negatively regulating the expression of MtGI and MtLHY . Surprisingly, the four MtPRRs functioned redundantly in regulating flowering time under long-day conditions, and the quadruple mutant flowered earlier. Moreover, MtPRR can recruit the MtTPL/MtTPR corepressors and the other MtPRRs to form heterodimers to constitute the core mechanism of the circadian oscillator.
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    • Grant Information:
      32300691 National Natural Science Foundation of China; ZR2023QC178 National Natural Science Foundation of Shandong Province
    • Contributed Indexing:
      Keywords: Medicago truncatula; MtPRR; MtTPL/MtTPR; circadian clock; flowering time; heterodimer
    • Publication Date:
      Date Created: 20231209 Date Completed: 20231216 Latest Revision: 20231216
    • Publication Date:
      20231217
    • Accession Number:
      PMC10706769
    • Accession Number:
      10.3390/ijms242316834
    • Accession Number:
      38069157