Elucidation of molecular mechanisms underlying avoidance of excess ammonium uptake into roots in rice
| Project/Area Number |
24580090
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Tohoku University |
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Principal Investigator |
HAYAKAWA Toshihiko 東北大学, (連合)農学研究科(研究院), 准教授 (60261492)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 遺伝子 / シグナル伝達 / 植物 / 生理学 / 発現制御 / 植物代謝調節 |
|---|
| Outline of Final Research Achievements |
Nitrogen is an essential macronutrient required in quantity for plant growth and productivity. Rice grown in flooded paddy fields chiefly takes up and uses an inorganic form of soil ammonium as an external nitrogen source; however, a sole supply of ammonium at high concentration frequently causes toxic effects to many terrestrial plants. Down-modulation of the high-affinity transport system for ammonium uptake into plant roots in response to an increasing ammonium supply is important for preventing ammonium-toxicity in plants. In this study, a protein kinase OsACTPK1 was suggested to be involved in negative modulation of ammonium transport activity of plasma membrane proteins associated with ammonium uptake in rice roots in response to an ascending external ammonium and possibly to internal carbon availability. This finding will provide a cue for better understanding of molecular mechanisms for preventing excess ammonium uptake into roots.
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Report
(4 results)
Research Products
(20 results)
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[Journal Article] Lack of cytosolic glutamine synthetase1;2 in vascular tissues of axillary buds caused severe reduction in their outgrowth and disorder of metabolic balance in rice seedlings2015
Author(s)
Ohashi, M., Ishiyama, K., Kusano, M., Fukushima, A., Kojima, S., Hanada, A., Kanno, K., Hayakawa, T., Seto, Y., Kyozuka, J., Yamaguchi, S., Yamaya, T.
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Journal Title
Plant J.
Volume: 81
Issue: 2
Pages: 347-356
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] NADH-dependent glutamate synthase plays a crucial role in assimilating ammonium in Arabidopsis root2014
Author(s)
Konishi, N., Ishiyama, K., Matsuoka, K., Maru, I., Hayakawa, T., Yamaya, T. and Kojima, S.
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Journal Title
Physiologia Plantarum
Volume: in press
Issue: 1
Pages: 138-151
DOI
NAID
Related Report
Peer Reviewed
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[Journal Article] Cytosolic glutamine synthetase1;2 is responsible for the primary assimilation of ammonium in rice roots2013
Author(s)
Funayama, K.$, Kojima, S.$, Tabuchi-Kobayashi, M., Sawa, Y., Nakayama, Y., Hayakawa, T. and Yamaya, T.
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Journal Title
Plant and Cell Physiology
Volume: 54
Issue: 6
Pages: 934-943
DOI
NAID
Related Report
Peer Reviewed
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