Salt stress was one of the major environmental factors that inhibited fruit growth and reduced fruit yield,and the grafting as main apple breeding method had an important influence on apple salt tolerance.Studying the growth and physiological variation of different rootstock-scion combinations stressed by NaCl was great significance in elucidating the mechanism of salt damage and screening of strang salt tolerance of apple rootstock-scion combinations.Four groups of three years old apple tree cultivated in ...