| Project/Area Number |
21K15123
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 44030:Plant molecular biology and physiology-related
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| Research Institution | Osaka University |
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Principal Investigator |
QIAN PINGPING 大阪大学, 大学院理学研究科, 准教授 (20840466)
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| Project Period (FY) |
2021-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | vasculature / transcription factor / peptide / phloem / CLE / Dof / receptor |
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| Outline of Research at the Start |
Regulatory mechanisms of phloem development and patterning are being uncovered, but are still only partially known. Here, we hypothesize that there are positive feedback mechanisms that reinforce the Phloem-Dofs expression during phloem development. Our preliminary results showed that Phloem-Dofs induce several positive regulators, including plant hormones and secretory peptides.I will uncover the integrated intracellular and intercellular signaling systems that create the proper vascular pattern, with emphasis on phloem.
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| Outline of Final Research Achievements |
The function of plant vasculature relies on its organized structure, which includes phloem, xylem, (pro)cambium. The phloem consists of sieve elements (SEs) and companion cells (CCs). We here identified a feedback system involving phloem-Dofs and CLE peptides, essential for proper phloem patterning(Qian et al. 2022, Nat Plants). Recent findings suggest that phloem patterning is regulated not only by feedback loops within the phloem region but also by signals from non-phloem cells. Additionally, we identified new DOF-targeted transcription factors that collaborate with P-DOFs to promote phloem formation.
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| Academic Significance and Societal Importance of the Research Achievements |
Our findings represent a significant advancement in understanding phloem development and patterning, marking a crucial step forward in the investigation of molecular mechanisms underlying vascular development. This research will also provide valuable guidance for future crop breeding efforts.
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