【摘要】 用0%、0.4%、0.8%、1.2%4种浓度NaCl溶液处理大果沙枣(Elaeagnus moorcroftii)和尖果沙(E.oxy-carpa)枣幼苗,盐胁迫7、14、21、35 d后分别测定4种处理条件下大果沙枣幼苗和尖果沙枣幼苗叶片中可溶性糖和丙二醛的含量,研究盐胁迫对沙枣膜脂过氧化和渗透调节的影响。结果表明:①0.4%NaCl溶液处理和0.8%NaCl溶液处理的两种沙枣幼苗叶片中MDA浓度前期(尖果沙枣21 d内,大果沙枣7 d内)增幅较小,但随着胁迫时间的延长,MDA浓度增幅变大,1.2%NaCl溶液处理的两种沙枣幼苗叶片中MDA含量最高;②两种沙枣幼苗0.4%、0.8%、1.2%三个NaCl溶液处理叶片中可溶性糖含量都高于对照水平。更多还原

【Abstract】 Elaeagnus oxycarpa and E.moorcrofiii seedlings were treated with concentrations of 0%,0.4%,0.8%,1.2%NaCl,MDA and soluble sugar of seedlings were determined after 7,14,21 and 35 days.The results showed that MDA in the two species of seedlings treated with 0.4% and 0.8% NaCl increased a little at the early stage(E.oxycarpa within 21 days,E.moorcroftii within 7 days),but latter,MDA increased.And leaves of two species treated with 1.2% NaCl had the highest MDA content.Soluble sugar content in treated two species seedling was higher than that in the control.更多还原