Effect of Inorganic Ions and Their Conductances on Geotropic Curvature of the Avena Coleoptile

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Abstract
Expts. were performed to test the effect of various concns. and specific conductances of LiCl, NaCl and KCl on geotropic curvature of the Avena coleoptile. Geotropic bending is inhibited when the coleoptile is filled with these solns. As the soln. concn. and specific conductance of a given salt is increased, the magnitude of curvature inhibition is enhanced. The extent of the curvature inhibition is not directly dependent on the exclusive property of specific conductance of solns. of LiCl, NaCl and KCl from 0.01 to 0.1[image]. Solns. of LiCl proved to be the most effective inhibitors of geotropic curvature. This inhibition appears to be due to a special characteristic of LiCl other than its specific conductance.