Plant Responses to Saline Substrates IV. Chloride Uptake by Hordeum Vulgare as Affected by Inhibitors, Transpiration, and Nutrients in the Medium

Abstract

Hordeum vulgare in the first and second leaf stage excluded chloride and sodium when these ions were at high external concentrations. Inside the roots chloride and sodium were at lower than external concentrations, even after 5 days in media of 50 and 100 m-equiv/l sodium chloride. At high transpiration rates the ascending sap attained only between I· 5 and 4 % of the medium concentration, showing that most of the water flowed through regions of low chloride permeability.