Measurements of Ion Concentrations inDunaliella parvaSubjected to Hypertonic Shock

1 April 1981

journal article
research article
Published by Oxford University Press (OUP) in Journal of Experimental Botany

Vol. 32 (2) , 333-340
https://doi.org/10.1093/jxb/32.2.333

Abstract

Cells of Dunaliella parva, a green halotolerant alga, were equilibrated in 0.5 M NaCl (the same concentration as in the growth medium). The time – course of changes in K⁺, Na⁺, Cl⁻, and pellet volume were followed after a hypertonic shock caused by increasing the outside NaCl concentration to 1 M. The cells responded initially by shrinking; they returned to their original volume in the course of the next 2–3 h. At the time of the hypertonic shock there were rapid influxes of Na⁺ and Cl⁻ which took about 30 min for completion. Thereafter, there were progressive losses of Na⁺ and Cl⁻; these losses were temperature-dependent and presumably activated by metabolic energy. Cell K⁺ remained constant throughout.

This publication has 1 reference indexed in Scilit:

Cation permeability of the plasmalemma of the halotolerant alga Dunaliella parva. I. Cation induced osmotic volume changes
Zeitschrift für Pflanzenphysiologie, 1977