Effects of Salt-drought Intercross Stress on Physiological and Biochemical Characteristics of Ammodendron argenteum (Pall.) Kuntze Seedlings

Potted Ammodendron argenteum(Pall.) Kuntze seedlings were used to study the effects of salt-drought intercross stress on physiological and biochemical characteristics to supply the theoretical foundation for reprtroduction and cultivation.Results showed that root mass ratio,ratio of root and comb,soluble sugar content,Chl a/b,and carotenoid content increased significantly with intensified stress,and all remained at a high level under different severe stresses.In contrast,leaf mass ratio,root activity,relative water content,and chlorophyll content all decreased.Conversely,CAT activity first increased and then decreased with increasing intercross stress.Comprehensive analysis showed Ammodendron argenteum(Pall.) Kuntze seedlings had tolerance to intercross stress,which indicates that appropriate drought stress can increase seedling resistance to salt stress.