【摘 要】
：
温室条件下,用NaCl和Na2SO4处理石头扁桃、桃扁桃和毛桃,处理浓度为0,75,150,300和350 mmol/L,处理10,20 d分别取叶、根和茎,测定各器官中离子吸收与分布变化规律.研究结果表
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温室条件下,用NaCl和Na2SO4处理石头扁桃、桃扁桃和毛桃,处理浓度为0,75,150,300和350 mmol/L,处理10,20 d分别取叶、根和茎,测定各器官中离子吸收与分布变化规律.研究结果表明,盐胁迫下,3种砧木根、茎、叶中Na+,Cl-,SO2-4含量及Na+/K+比均随盐浓度的增加和处理时间的延长而增加,K+含量变化规律不稳定,但桃扁桃根、茎和叶片中K+ 略高于其他两个品种;石头扁桃根、茎、叶片中Na+/K+比值高于其它两个品种,桃扁桃中Na+/K+比值最低.桃扁桃根部Na+,Cl-和SO2-4含量高于石头扁桃和毛桃,而叶片和茎中Na+,Cl-和SO2-4含量却低于石头扁桃和毛桃.桃扁桃根部能够积累较多的Na+,阻止和减少了Na+向地上部的运输,从而减轻了Na2SO4对它的伤害,进而表明了桃扁桃耐盐能力较强.
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