2022 Fiscal Year Final Research Report
Phloem patterning by CLE peptides
| Project/Area Number |
19H03246
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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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 |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | phloem / CLE / Arabidopsis / Transcription factor / Dof / receptor |
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| Outline of Final Research Achievements |
We identified master transcription factors, phloem-Dofs, which are expressed in phloem precursors, and directs the phloem-fate commitment. Phloem-Dofs induce genes that are required for phloem formation, but also induce CLE25, 26, and 45, which inhibit phloem formation. CLE25, 26 and 45 are perceived by BAM-CIK receptor-coreceptor complexes and destabilize phloem-Dof proteins forming negative feedback. These positive and negative regulation creates the proper phloem organization.
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| Free Research Field |
Plant Science
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| Academic Significance and Societal Importance of the Research Achievements |
維管束植物において篩部は光合成産物を運ぶ大切な器官ですが、その細胞パタンがどのように作られるのか、篩部細胞はどのようにして分化運命を獲得するのかについてはよくわかっていませんでした。本研究において、篩部形成のマスター因子が同定されたこと、拡散性のCLEペプチドによる負のフィードバックによって適切な篩部パタンが作られることが解明されたのは学術上の大きな意義があります。
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