Effects of Elevated Atmospheric Carbon Dioxide Concentration on Silica Deposition in Rice (Oryza sativa L.) Panicle(Crop Physiology & Ecology)
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概要
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The effects of elevated carbon dioxide concentration ([CO_2]) on silica deposition on husk epidermis of rice (Oryza sativa L. cv. Akitakomachi) during the flowering stage were investigated in this study. The study was motivated by the concept that the rice yield maybe affected by global warming as a result of elevated [CO_2] environment since sterility of rice is related to the panicle silica content that influences transpiration, and elevated [CO_2] could affect plant transpiration. Silica deposition analysis was focused on the flowering stage of the rice crop grown hydroponically under two [CO_2] conditions: 350 μmol mol^<-1> (ambient) and 700 μmol mol^<-1> (elevated). Silica deposition on the husk epidermis from three parts of the panicle at four flowering stages were examined using a scanning electron microscope (SEM) combined with an energy dispersive X-ray microanalyzer (EDX). The results demonstrated that elevated [CO_2] significantly suppressed silica deposition on the husk epidermis at the lower part of the panicle, and at the early flowering stage when 1/3 of the panicle emerged from the leaf sheath. In the transverse section analysis of the husk, silica deposition on the husk epidermis under elevated [CO_2] was less than that under ambient [CO_2] at the late flowering stage. The less silica deposition observed on the husks at the late flowering stage under elevated [CO_2] might be related to the suppressed transpiration from the panicle by elevated [CO_2] found in a previous study.
- 日本作物学会の論文
著者
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ISOGAI Akira
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Ling Peter
Dept. Food Agricultural And Biological Engineering The Ohio State University
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Isogai Akira
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Takahashi Noriko
Dept. Food, Agricultural and Biological Engineering, The Ohio State University
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Kato Yasuyuki
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Kurata Kenji
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Kurata Kenji
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Isogai Akira
Graduate School Of Agricultural And Life Science The University Of Tokyo
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Takahashi Noriko
Dept. Food Agricultural And Biological Engineering The Ohio State University
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Kato Yasuyuki
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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