Effect of Salt Stress on Absorption and Distribution of Na~+,K~+, Cl~-in Triticale Cultivars with Different Salt-tolerance

In order to study the relationship between the salt tolerance ability and ion uptake under salt stress,the seedlings of four genotypes of triticale were treated with NaCl at different concentrations(0,50,100,200mmol·L-1),and the fresh weight,the distribution of Na+,K+,Cl-in shoot and root of plants,the ability of limiting Na+,and the K+/Na+ratio were analyzed after 10days.The results showed that fresh weight of triticale seedlings decreased gradually,and the contents of Na+and Cl-increased gradually along with the increase of salt concentration.There were higher contents of Na+and Cl-in shoot than those in roots except Zhongsi 828.The K+content gradually decreased along with increase of salt concentration,but the decrease of K+in root was higher than in shoot.The ability of limiting Na+and the K+/Na+ratio gradually decreased with the increase of salt concentration.Among the 4varieties,salt-tolerant variety Zhongsi 828could maintain relatively lower contents of Na+,and Cl-,higher K+/Na+ratio,and higher biomass,and they were the contrary to the saltsensitive variety Jinsong 49.The ability to limiting Na+concentration in shoot and higher K+/Na+ ratio could be one of the strategies of the triticale salt-tolerance.