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Plant and Cell Physiology, 1986, Vol. 27, No. 1 169-175
© 1986

Article

Conductometric Method for Detecting Ion Efflux during a Single Action Potential of Chara

Munehiro Kikuyama and Hirotaka Hirata

Faculty of Pharmacology, Niigata College of Pharmacy Kamishin-ei-cho, Niigata 950-21, Japan

A simple device was developed to detect net ion efflux during a single action potential of Chara as an increase in the electric conductance of the bathing solution. The device showed a sufficiently high sensitivity and rapid response to the increase in the electric conductance. Net efflux of monovalent ions was estimated as 65–660 pmol cm–2 impluse–1 (average 220 pmol cm–2 impulse–1).

(Received June 28, 1985; Accepted November 13, 1985)
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