| Project/Area Number |
22770035
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Plant molecular biology/Plant physiology
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 環境応答 / 成長相転換 / 陸上植物 / コケ植物 / フィトクロム / 光シグナル伝達 / メリステム / 転写因子 / 生殖 / ゼニゴケ / 分裂組織 |
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| Research Abstract |
Plants regulate their growth phase transition in response to light environment such as day-length and light qualities. We focused on a red/far-red receptor, phytochrome, as a key regulator of growth phase transition, and investigated the phytochrome-mediated signaling mechanism in the liverwort Marchantia polymorpha. We showed that phytochrome is translocated to nucleus in response to light. A series of transgenic approaches suggested that phytochrome regulates gene expression via a homologue of transcription factor, PHYTOCHROME INERACTING FACTOR(PIF). Our results also implied that the active-form phytochrome up-regulated the expression cyclin D, a core regulator of cell cycle progression. Taken together, phytochrome in Marchantia could regulate the growth phase transition by regulating, possibly via PIF, the nuclear gene expression of cell cycle gene such as cyclin D.
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