盐胁迫下珠美海棠体内离子分配与叶片耐盐量研究

对NaCl胁迫下珠美海棠体内K~ 、Na~ 、Cl~-含量变化及电解质渗透率测定结果表明,NaCl胁迫下珠美海棠对K~ 的吸收及向地上部分运输能力基本保持不变,K~ 、Na~ 、C1~-含量随盐胁迫浓度的增加而显著增加,Cl~-向地上部分运输的能力大于K~ 、Na~ ,Na~ 对珠美海棠的伤害远远大于Cl~-,叶片耐Na~ 量为5.76g/kg,耐Cl~-量为14.17g/kg。

Ion distribution in plant and salt tolerability of leaves of Malus zumi under stress of NaCI

The contents of K ,Na ,C1-and the percentage of electrolyte leakage of Malus zumi leaves under Nad stress are measured and analyzed.The results show that the ability of absorbing and transporting K of Malus zumi changes little,and the contents of K ,Na ,C1-increase as the concentration of NaCl rises; the quantity of Cl-transported from roots to shoots is more than those of K ,Na ; the damage to the plant of Malus zumi caused by Na is more serious than that caused by Cl.The resistibility of Malus zumi leaves to Na is 5.76g/kg and to Cl is 14.17g/kg.