Response to salinity in Glycine. 2. Differences in cultivars of Glycine javanica in dry weight, nitrogen, and water content

Abstract

Growth response of 22 accessions of Glycine javanica. was studied to detect any significant features that would provide an insight into the mechanisms of salt tolerance. Four levels of salinity, 0.5, 35, 70, and 140 m-equiv. NaCl/l, were imposed in culture solutions for 13 days starting when the plant had three trifoliate leaves. The highest level of salinity had a relatively greater impact on growth than the others. Differences in the dry weight of the glycines at all salinity levels were of similar proportions to those at the control level. This also applied to the laminae, stem f petiole, and roots. The data for plant nitrogen also showed these differences in growth potential at different levels of salinity. The normal capacity for growth of a cultivar seemed to be an important feature in resisting salinity.