CO2倍增对渗透胁迫下小麦叶片抗氧化酶类及细胞程序性死亡的影响

被引:43
作者
林久生
王根轩
机构
[1] 兰州大学干旱农业生态国家重点实验室!兰州,兰州大学干旱农业生态国家重点实验室!兰州
关键词
CO2倍增; PEG; 抗氧化酶; H2O2; 细胞程序性死亡;
D O I
暂无
中图分类号
Q942.5 [植物细胞生理学];
学科分类号
摘要
经渗透胁迫后 ,CO2 倍增条件下小麦叶片的SOD、POX和CAT的活性均显著高于对照 ,上升或稳定时期较长 ;在渗透胁迫后期MDA含量和电解质泄露率增加较慢 ,显著低于对照 ;H2 O2 含量一直高于对照但进行PEG胁迫后增长较慢。CO2 倍增条件下 ,小麦细胞出现DNA梯的时间较晚而且持续的时间较长 ,DNA梯出现时抗氧化酶和H2 O2 处于相对稳定状态。结果表明在渗透胁迫下CO2 倍增使小麦的抗氧化能力增强从而减轻了对细胞膜和DNA的损伤 ,并且干旱条件下小麦的细胞程序性死亡可能是由于细胞内氧化过强所致
引用
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页码:453 / 457
页数:5
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