Distribution of electric potential and ion transport in the hypocotyl of Vigna sesquipedalis IV. The effects of carbon monoxide and cyanide on the axial potential difference of hypocotyl segments

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概要

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• The effects of carbon monoxide and cyanide on the electric potential difference between both cut ends of a hypocotyl segment excised from a bean embryo were investigated. Carbon monoxide definitely diminished the PD. This inhibition was photoreversible. The inhibition ratio was quantitatively related to the [CO]/[O_2] ratio of the gas mixture. Prolonged exposure to a CO gas mixture induced spontaneous recovery of the PD, and this CO-resistant electrogenic activity was sensitive to CN and also disappeared under anoxia. Cyanide also diminished the PD and often induced oscillation of the potential. The type of oscillation and the inhibition ratio varied with the concentration of CN. Some-times CN pretreatment caused changes in the anoxia response of the potential. The time course of the spontaneous change in PD after cutting of the hypocotyl segment also was investigated.

• 日本植物生理学会の論文

著者

• Mizuno Akiko

  Biological Institute Faculty Of Science Nagoya University

関連論文

• Structure and function of the elongation sink in thesteruls of higher plants I. Effects of anoxia and IAA on the growth rate and the spatially separate electrogenic ion pumps
• Distribution of electric potential and ion transport in the hypocotyl of Vigna sesquipedalis IV. The effects of carbon monoxide and cyanide on the axial potential difference of hypocotyl segments

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