Reduction by GA₃ of Nacl-Induced Inhibition of Growth and Development in Suaeda ussuriensis

Abstract

Seedlings of Suaeda ussuriensis were grown in soil with NaCl concentrations of 0.5, 1.0, 2.0 and 3.0% on a dry weight basis. The optimum salt concentration for growth and development was 1.0%. At 3.0% all seedlings died. Treatment with 10*5 µg/litre GA₃ counteracted partly the growth inhibition, and the dry weight of plants increased 21.6, 2.2 and 19.4%, respectively, for soils with salt concentrations of 0.5, 1.0 and 2.0%. GA*3 increased the numbers of plants coming to flower in soil of salt concentration of 0.5 and 2.0%, by 40 and 20%, respectively, but had no effect on plant growth in a salt concentration of 1.0%.