2013 Fiscal Year Final Research Report
Comprehensive analyses of regulation systems for construction of the optimum photosynthetic system at the plant individual level.
| Project/Area Number |
23370015
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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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| Research Field |
Plant molecular biology/Plant physiology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TERASHIMA Ichiro 東京大学, 理学(系)研究科(研究院), 教授 (40211388)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | システミック調節 / 植物ホルモン / 相対成長率 / 成熟葉ファクター |
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| Research Abstract |
Effects of the mature leaves on leaf development were studied with Arabidopsis. Partial shading experiments revealed the strong influence of mature leaf photosynthesis and/or light environment.
Seedlings of Polygonum cuspidatum were grown under various light and nitrogen availabilities. We exogenously sprayed solutions of gibberellin (GA3), benzyl adenine (BA), uniconazole (an inhibitor of GAs synthesis) or their mixtures on the aboveground parts. The morphological traits were markedly changed by the spraying. Biomass allocation to leaves was increased by GA3 and BA, whereas it decreased by uniconazole. GA3 decreased the leaf mass per area, while uniconazole increased it. We found close relationships among the morphological traits, physiological traits such as photosynthetic rate and net assimilation rate, and relative growth rate under all the growth conditions.These phytohormones may be involved in regulation of biomass allocation in various light and/or nitrogen availabilities.
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[Journal Article] Nitrate addition alleviates ammonium toxicity without lessening ammonium accumulation, organic acid depletion and inorganic cation depletion in Arabidopsis thaliana shoots2012
Author(s)
Hachiya T, Watanabe C, Fujimoto M, Ishikawa T, Takahara K, Kawai-Yamada M, Uchimiya H, Uesono Y, Terashima I, Noguchi K
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Journal Title
Plant Cell Physiol
Volume: 53
Pages: 577-591
DOI
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