Potassium, sodium and Chloride in the protoplasm of characeae

Using vacuolar perfusion, which enabled us to replace the cell sap with a solution containing no k+, Na+ and Cl−, the concentrations of these ions in the protoplasm of three species of fresh water Characeae were determined. They were respectively, 78, 2 and 27 mM in Nitella flexilis , 101, 9 and 31...

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Bibliographic Details
Main Authors: Tazawa, Masashi, Kishimoto, Uichiro, Kikuyama, Munehiro
Format: Text
Language:English
Published: Oxford University Press 1974
Subjects:
research-article
Nitella flexilis
Online Access:http://pcp.oxfordjournals.org/cgi/content/short/15/1/103
Description
Summary:Using vacuolar perfusion, which enabled us to replace the cell sap with a solution containing no k+, Na+ and Cl−, the concentrations of these ions in the protoplasm of three species of fresh water Characeae were determined. They were respectively, 78, 2 and 27 mM in Nitella flexilis , 101, 9 and 31 m<scp>M</scp> in Nitella pulchella , and 112, 3 and 21 m<scp>M</scp> in Chara australis . Our previously reported results ( 3 ) indicating that the chloroplast layer contained much more Na+ and Cl− than the endoplasm has been questioned in the light of the present results.

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