2009 Fiscal Year Final Research Report
Investigating the signal transduction mechanisms for photomovements in rice
| Project/Area Number |
17084007
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Biological Sciences
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| Research Institution | Osaka City University |
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Principal Investigator |
IINO Moritoshi Osaka City University, 大学院・理学研究科, 教授 (50176054)
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| Co-Investigator(Renkei-kenkyūsha) |
HAGA Ken 大阪市立大学, 大学院・理学研究科, 博士研究員 (50382031)
TAKANO Makoto 農業生物資源研究所, 植物科学研究グループ, 光環境応答研究ユニット・ユニット長 (20355754)
YANO Masahiro 農業生物資源研究所, 基盤研究領域QTLゲノム育種研究センター, センター長 (50355749)
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| Project Period (FY) |
2005 – 2009
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| Keywords | イネ / 運動 / フォトトロピン / 光屈性 / 光シグナル伝達 |
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| Research Abstract |
We demonstrated genetically (1) that rice phototropin 1 (phot1), encoded by two gene homologs, serves as a photoreceptor in phototropisms of coleoptiles and primary roots and in photoaccumulation response of chloroplasts, (2) that phot1 is nearly the sole photoreceptor for the phototropisms, and (3) that the multiphasic fluence-response curve of coleoptile phototropism represents almost entirely the properties of phot1 signaling, in which CPT1 functions as a critical component. Furthermore, we identified the gene responsible for cpt2 mutation that results in specifically impaired coleoptile phototropism.
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