Effect of CO_2 on Volume Change of Guard Cell Protoplast from Vicia faba L.
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概要
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Guard cell protoplasts (GCP) were isolated from epidermal strips of Vicia faba L. by enzymatic digestion. The presence of non-osmotic volume in the protoplast was suggested by the relationship between protoplast volume and the mannitol concentration of the suspending medium. Light illumination caused swelling of GCP only when KCl was present in the suspending medium. Dark treatment caused shrinking of GCP irrespective of the presence of 10 mM KCl. In the presence of 10μM abscisic acid (ABA), GCP shrank. Light-induced swelling was suppressed at concentrations of ambient CO_2 higher than that in normal air. Promotion of swelling was not always observed at lower CO_2 concentration. These volume change responses to light, ABA and CO_2 suggest that GCP retains its physiological activity as a guard cell. The osmotic contribution of K^+ to volume increase was lower than expected. Ambient CO_2 seems to have some effect on the contribution of K^+ to osmoregulation of GCP.
- 日本植物生理学会の論文
著者
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SYONO Kunihiko
Department of Pure and Applied Sciences, The University of Tokyo
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Kondo Noriaki
Division Of Environmental Biology The National Institute For Environmental Studies
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Syono Kunihiko
Department Of Pure And Applied Sciences College Of General Education University Of Tokyo
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Syono Kunihiko
Department Of Life Science Graduate School Of Arts And Sciences University Of Tokyo:(present Address
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Kondo Noriaki
Division Of Biosciences Graduate School Of Sciences And Engineering Teikyo University Of Science And
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Gotow Kiyoshi
Plant Physiology Tokyo Gakugei University:(present)division Of Environmental Biology The National In
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Gotow Kiyoshi
Department of Pure and Applied Sciences, College of General Education, University of Tokyo
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Gotow Kiyoshi
Department Of Pure And Applied Sciences College Of General Education University Of Tokyo
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