Effects of Elevated CO_2 Concentration on Photosynthetic Carbon Metabolism in Flag-Leaf Blades of Rice before and after Heading
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概要
- 論文の詳細を見る
We monitored the effects of elevated atmospheric CO_2 concentrations on the photosynthetic carbon metabolism in the flag leaves of rice plant (Oryza saliva L. cv. Akitakomachi) before and after heading. The plants were grown under ambient (350 ppm : control) or elevated (650 ppm) CO_2 conditions. Flag-leaf blades grown under high CO_2 accumulated more starch than control leaf blades before heading, but the level of starch declined to almost zero under both CO_2 concentrations as soon as the development of ears began. Before heading, the transcript level of sucrose-phosphate synthase (SPS) (EC 2.4.1.14), a key enzyme in the sucrose synthesis in flag-leaf blades was significantly higher under elevated CO_2 conditions than under elevated CO_2 (P<0.01). The difference in the expression of SPS decreased after heading, coinciding with a change in starch contents in both groups. These results showed that the effects of elevated CO_2 concentration on rice plants might vary with the growth stage of the leaf blades. We also discussed the influence of the changes in the carbohydrate metabolism of rice plants caused by elevated GO_2 concentration on yield.
- 日本作物学会の論文
著者
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Okamoto K
Department Of Bio-medical Engineering Tokai University
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Okamoto Katsuro
Dept. Bio-medical Engineering School Of High Technology For Human Welfare Tokai University
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Sasaki Haruto
Graduate School of Agriculture and Life Science,University of Tokyo
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Aoki Naohiro
Department Of Plant Physiology National Institute Of Agrobiological Sciences
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Aoki Naohiro
Japan International Research Center For Agricultural Sciences
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Sasaki Haruto
Graduate School Of Agriculture And Life Sciences The University Of Tokyo
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Sasaki Haruto
Graduate School Of Agricultural And Life Science University Of Tokyo
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Aoki Naohiro
Department Of Agricultural And Environmental Biology Graduate School Of Agricultural And Life Scienc
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Kobayashi Kazuhiko
National Institute of Agro-Environmental Science, Tsukuba
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Kobayashi Kazuhiko
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Sakai Hidemitsu
National Institute of Agro-Environmental Sciences
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Ishimaru Ken
Department of Plant Physiology, National Institute of Agrobiological Resources
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Ono Kiyomi
Department of Plant Physiology,National Institute of Agrobiological Sciences
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Seneweera Saman
National Institute of Agro-Environmental Sciences
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Sakai Hidemitsu
Graduate School of Agriculture and Life Science,University of Tokyo
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Ishimaru Ken
N.i.a.r.
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Ono Kiyomi
National Institute Of Agrobiological Sciences:(present Office) Institute Of Low Temperature Science
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Ozawa Kenjiroh
National Institute Of Agrobiological Resources
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ISHIMARU Ken
Nat. Inst. Agrobiol. Resources
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Okamoto K
Dept. Of Bio-medical Engineering School Of High-technology For Human Welfare Tokai University
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Sakai Hidemitsu
Graduate School Of Agriculture And Life Science University Of Tokyo
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Ono Kiyomi
Department Of Bio-medical Engineering Tokai University
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Ishimaru Ken
Department Of Plant Physiology National Institute Of Agrobiological Resources
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Kobayashi Kazuhiko
Graduate School Of Agriculture And Life Sciences The University Of Tokyo
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