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Localization of Hydrogen Ion and Chloride Ion Fluxes in Nitella

Localization of Hydrogen Ion and Chloride Ion Fluxes in Nitella Alternating bands of acid and base formation have been detected along the length of the internodal cell of Nitella clavata when it is illuminated, while in the dark this phenomenon is minimal. Chloride influx occurs only or largely in the acid-extruding regions, and this is also a light-dependent ion movement. Chloride efflux is slightly dependent on illumination and is not localized as are H + efflux and Cl - influx. The results obtained support Kitasato's (1968) proposal that a large passive H + influx is balanced by an active efflux of this ion. Transport mechanisms suggested by the correlations of Cl - and HCO 3 - influxes with H + extrusion are discussed. Footnotes Submitted: 30 January 1969 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of General Physiology Rockefeller University Press

Localization of Hydrogen Ion and Chloride Ion Fluxes in Nitella

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References (39)

Publisher
Rockefeller University Press
Copyright
© 1969 Rockefeller University Press
ISSN
0022-1295
eISSN
1540-7748
DOI
10.1085/jgp.54.3.397
Publisher site
See Article on Publisher Site

Abstract

Alternating bands of acid and base formation have been detected along the length of the internodal cell of Nitella clavata when it is illuminated, while in the dark this phenomenon is minimal. Chloride influx occurs only or largely in the acid-extruding regions, and this is also a light-dependent ion movement. Chloride efflux is slightly dependent on illumination and is not localized as are H + efflux and Cl - influx. The results obtained support Kitasato's (1968) proposal that a large passive H + influx is balanced by an active efflux of this ion. Transport mechanisms suggested by the correlations of Cl - and HCO 3 - influxes with H + extrusion are discussed. Footnotes Submitted: 30 January 1969

Journal

The Journal of General PhysiologyRockefeller University Press

Published: Sep 1, 1969

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