Effects of compound anti-salt agent on seed germination and growth of wheat under NaCl stress
Seven substances,including KNO3、CaCl2、DA-6、KH2PO4、FeSO4·7H2O、MgSO4·7H2O,and sucrose were used to formulate compound anti-salt agent.Using'Jimai 22'as test material,the water cultivaton method was employed to investigate the effects of different concentrations of anti-salt agent(10％,20％and 30％)on seed germination and subsequent seedling growth under different salt(NaCl)stress(0.2％,0.4％and 0.6％),and consequently the suitable formulation of anti-salt agent for wheat was proposed.The results showed that:(1)30％,20％and 10％anti-salt agent had the best effect in promoting wheat seed germination under 0.2％,0.4％and 0.6％salt stress,and the germination rate increased by 6.4％,12.0％and 26.5％,respectively.(2)Adding anti-salt a-gents at a salt concentration of 0.6％,root dry mass significantly increased by 29.7％to 35.9％.Photosynthetic rate was increased after the addition of anti-salt agent by 67.5％～90.0％(salt concentration 0.2％),13.3％～51.5％(salt concentration 0.4％)and 0.4％～25.5％(salt concentration 0.6％),respectively.The 30％anti-salt agent significantly enhanced photosynthesis at a salt concentration of 0.2％,with an increase of 90.0％.The photosynthetic pigment content of wheat was increased,with Chla content increased by 22.5％～39.0％(salt con-centration 0.2％),41.7％to 43.2％(salt concentration 0.4％);and Chlb content increased by 22.1％～31.0％(salt concentration 0.2％),14.7％～22.5％(salt concentration 0.4％);and carotenoid content increased by 12.2％to 28.6％(salt concentration 0.2％)and 24.4％to 32.3％(salt concentration 0.4％),respectively.In addi-tion,other physiological indicators also had corresponding improvement.(3)Based on the principal component a-nalysis,the results showed that wheat treated with 30％anti-salt agent had the highest score,so 30％anti-salt a-gent was the most suitable concentration ratio.
万方数据
维普
