CONDUCTIVITY MEASUREMENTS OF PLANT SAP

Abstract

Using cold-hardened red clover roots, hardened and unhardened cabbage shoots, and leaves and young plants of Bryophyllum, the conductivity varied inversely with the relative viscosity, the unfreezable water, and total sugar content. Total water content was positively, and non-protein N negatively correlated with conductivity. No consistent relation between protein N and conductivity was found. "Electrodialysis data indicate that the lower conductivity of the expressed sap from cold-hardened plants was not due entirely to fewer ions, but was probably influenced by adsorption, viscosity, ionization, etc.".