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Salixspp.is one of main tree species grown in Maowusu Sand Dune in northwestern China.There has been little research into physiological reactions to salt stress and about salt tolerance in Salix psammophila.As one of the tree species of strong to salt stress,the salt tolerance was investigatedin 1-year-old hydroponically culturedcuttings exposed to salt stress (0,50,100,or 150mM) for 1 weeks in 1/2 Hoagland solution.