Effects of K~+ and Mg~(2+) on Physiological Traits of Buckwheat Seedlings Under Salt Stress

Buckwheat seedlings with different salt tolerance were used as experimental materials.Physiological indexes of buckwheat seedlings were determined through adding different concentrations of K+and Mg2+under salt stress.The results showed that the appropriate concentrations of K+and Mg2+treatment could significantly decrease the plasmalemma permeability of leaves and MDA molality of buckwheat under salt stress,the salt-tolerant buckwheat variety decreased more,and that could significantly increase the roots vigor of buckwheat seedlings and leaves chlorophyll mass fraction and SOD activity under salt stress,and the salt-sensitive buckwheat variety increased more.The optimal concentrations of K+and Mg2+treatment were 20mmol/L and 10mmol/L respectively,the effect of Mg2+treatment was better than that of K+.