| Project/Area Number |
13CE2005
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| Research Category |
Grant-in-Aid for COE Research
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| Allocation Type | Single-year Grants |
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
MATSUOKA Makoto Nagoya University, Bioscience and Biotechnology Center, Professor, 生物機能開発利用研究センター, 教授 (00270992)
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| Co-Investigator(Kenkyū-buntansha) |
HATTORI Tsukaho Nagoya University, Bioscience and Biotechnology Center, Professor, 生物機能開発利用研究センター, 教授 (10164865)
SAKAGAMI Youji Nagoya University, Graduate School of Bioagricultural Sciences, Professor, 大学院・生命農学研究科, 教授 (80107408)
MAESHIMA Masayoshi Nagoya University, Graduate School of Bioagricultural Sciences, Professor, 大学院・生命農学研究科, 教授 (80181577)
UOZUMI Nobuyuki Nagoya University, Bioscience and Biotechnology Center, Professor, 生物機能開発利用研究センター, 教授 (40223515)
MIZUNO Takeshi Nagoya University, Graduate School of Bioagricultural Sciences, Professor, 大学院・生命農学研究科, 教授 (10174038)
上口 智治 名古屋大学, 生物分子応答研究センター, 助教授 (20232738)
近藤 孝男 名古屋大学, 大学院・理学研究科, 教授 (10124223)
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| Project Period (FY) |
2001 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥941,550,000 (Direct Cost: ¥748,500,000、Indirect Cost: ¥193,050,000)
Fiscal Year 2005: ¥195,000,000 (Direct Cost: ¥150,000,000、Indirect Cost: ¥45,000,000)
Fiscal Year 2004: ¥195,000,000 (Direct Cost: ¥150,000,000、Indirect Cost: ¥45,000,000)
Fiscal Year 2003: ¥195,000,000 (Direct Cost: ¥150,000,000、Indirect Cost: ¥45,000,000)
Fiscal Year 2002: ¥251,550,000 (Direct Cost: ¥193,500,000、Indirect Cost: ¥58,050,000)
Fiscal Year 2001: ¥105,000,000 (Direct Cost: ¥105,000,000)
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| Keywords | Plant molecular breeding / Plant growth substance / Transport mechanism / Environmental response / Nutrient response |
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| Research Abstract |
○Study on molecular mechanism of plant growth
We identified a receptor of gibberellin (GA). which is an important growth phytohormone. The GAreceptor interacts with bioactive GAs at a reasonable concentration. The binding GA to the receptor induces the interaction between GID1 and a DELLA protein, which functions as a negative factor of GA signaling. Cytokinin is another growth phytohomone. We identified the three genes encoding cytokinin receptors and investigated their relevant in planta functions. We also revealed that a grain number in rice is controlled by the level of cytokinin in the floral meristems. Using the graining number gene, we increased the grain number of Koshihikari, the top rice leading variety of Japan. We identified a set of components (or genes), named PRRs, which play coordinately essential roles within (or dose to) the Arabidopsis circadian clock that is important for the control of the flowering time in plants. We also identified a receptor of plant peptide hormone, pktosulfokine, discovered by us.
○Study on molecular mechanism of plant response to physical environments.
We found characteristic properties of five cation/H+ exchangers of rice. Ktr/HKTtype transporters were also found to be essential for the adaptation of plants and bacteria to salinity stress and high osmolality We also revealed that nitrate transporter genes are activated by multiple mechanisms involving nitrate and/or nitrite, and also that glutamine was shown to regulate nitrate transport activity at both the transcriptional and post-translational levels. For understanding of signal transduction of responses to hyperosmotic stress, we have identified an SnRK2 interacting protein that would function as a scaffold for signaling components.
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