Effects of Several Osmotic Substrates on the Water Relationships of Tomato

Abstract

Osmotic substrates, comprising 5· and lO·atm concentrations of potassium nitrate, sodium chloride, mannitol, and sucrose were addEld to standard culture solutions in order to determine the effect on relative turgidity, DPD, osmotic poten. tial, transpiration, and growth of tomato plants. 14C-labelled mannitol and 38CI-labelled sodium chloride were incorporated into the high-concentration treatments to provide additional information on solute absorption.