土壤盐碱胁迫对春小麦K^+、Na^+选择性吸收的影响 LOCALIZATION OF Na~+ IN THISSUES OF Malus zumi UNDER NaCl STRESS Distribution of Na~+ and K~+ in cotton plant under NaCl stress and salt tolerance Difference in Na+,K+ Accumulation in the Salttolerant Mutant and the Wild Type of Wheat During Exposure to NaCl Stress METHODS OF Na~+ EFFLUX RATE OF WHEAT ROOT MEASURED BY NUCLIDE TRACER Biochemical analysis of salt tolerant cell line and their progeny of wheat