铜胁迫下吊兰的生理响应及对铜的吸收特性

Physiological Response and Copper Absorption Characteristics of Chlorophytum under Copper Stress

采用水培法研究了铜胁迫下吊兰的生理响应及对铜的吸收特性。实验结果表明:短期内低浓度的Cu 2+胁迫(15 mg/L)对吊兰的光合过程存在促进作用,高浓度的Cu 2+胁迫(30 mg/L和60 mg/L)对吊兰光合过程存在明显的抑制;随着Cu 2+胁迫浓度的增大,吊兰根和叶片组织中丙二醛的含量显著增加,并且叶片组织对Cu 2+胁迫作用的响应敏感性高于根系组织;吊兰根系组织中的铜含量水平均明显高于叶片组织,并且随着Cu 2+浓度的增大根组织中铜的含量水平也显著增高,而叶片组织中的铜含量水平则变化不明显。研究结论能为该植物应用于铜污染环境的修复提供理论参考。

The physiological response and copper absorption characteristics of Chlorophytum under copper stress were studied by hydroponic experiment.The results showed that low concentration of Cu 2+stress(15 mg/L)promoted the photosynthetic process of Chlorophytum in a short time,and high concentration of Cu 2+stress(30 mg/L and 60 mg/L)significantly inhibited the photosynthetic process of Chlorophytum.With the increase of Cu 2+concentration,the content of malondialdehyde in Chlorophytum root and leaf tissue increased significantly,and the response sensitivity of leaf tissue to Cu 2+stress was higher than that of root tissue.The copper content level in Chlorophytum root tissue was significantly higher than that in leaf tissue,and with the increase of Cu 2+concentration,the copper content level in root tissue also increased significantly,while the copper content level in leaf tissue did not change significantly.The research conclusion could provide a theoretical reference for the application of the plant in the remediation of copper polluted environment.