[1]张秀娟,孙润生,吴楚,等.Hg、Cd复合污染对千屈菜生理生化指标的影响[J].北方园艺,2013,37(18):74-77.
　ZHANG Xiu-juan,SUN Run-sheng,WU Chu,et al.Effects of Mercury(Hg) and Cadmiumm(Cd) Combined Pollution on the Physiological and Biochemical Indexes of Lythrum salicaria[J].Northern Horticulture,2013,37(18):74-77.

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Hg、Cd复合污染对千屈菜生理生化指标的影响

《北方园艺》[ISSN:1001-0009/CN:23-1247/S] 卷: 第37卷期数: 2013年18期页码: 74-77 栏目: 出版日期: 2013-09-30

Title:: Effects of Mercury(Hg) and Cadmiumm(Cd) Combined Pollution on the Physiological and Biochemical Indexes of Lythrum salicaria

文章编号:: 1001-0009(2013)18-0074-04

作者:: 张秀娟¹; 孙润生²; 吴楚¹; 许凤英³; 1.长江大学园艺园林学院，湖北荆州 434025；
2.南京农业大学园艺学院，江苏南京 210000；
3.长江大学农学院，湖北荆州 434025

Author(s):: ZHANG Xiu-juan¹; SUN Run-sheng²; WU Chu¹; XU Feng-ying³; 1.College of Horticulture and Garden,Yangtze University,Jingzhou,Hubei 434025;
2.College of Garden,Nanjing Agriculture University,Nanjing,Jiangsu 21000;
3.College of Agriculture,Yangtze University,Jingzhou,Hubei 434025

关键词:: 千屈菜; 汞; 镉; 抗氧化系统

Keywords:: Lythrum salicaria; mercury (Hg); cadmiumm(Cd); antioxidant enzyme systems

分类号:: S 688

文献标志码:: A

摘要:: 以千屈菜为试材，研究了不同浓度汞（Hg）（0、0.5、5.0、50.0 mg/L）及镉（Cd）（0、0.5、5.0、50.0 mg/L）胁迫对其生理生化指标的影响。结果表明：低浓度Hg、Cd刺激千屈菜生长；随着Hg、Cd浓度的增加，叶绿素相对含量呈现小幅上涨而后下降；低浓度Cd²⁺对超氧化物歧化酶（SOD）和抗坏血酸过氧化物酶（APX）活性有提高作用，但过氧化氢酶（CAT）活性随重金属浓度增加而下降，丙二醛（MDA）含量处于波动状态；随着Hg、Cd浓度的增加，细胞膜相对透性增加。Hg、Cd复合污染重于Hg、Cd单一胁迫处理。总之，千屈菜能够通过调节抗氧化系统来适应重金属环境，较耐Hg和Cd胁迫，是具有优良前景的环境治理及园林绿化水生花卉。

Abstract:: Taking Lythrum salicaria as material,the effect of different concentrations of mercury (Hg) (0,0.5,5.0 and 50.0 mg/L) and cadmium (Cd) (0,0.5,5.0 and 50.0 mg/L) on the physiological and biochemical indexes of it were studied.The results showed that low concentrations of Hg²⁺ and Cd²⁺stimulated the growth of Lythrum salicaria.With the increase of Hg²⁺or Cd²⁺concentrations,relative chlorophyll content was slightly increased but then declined.Lower concentrations of Cd²⁺could improve ascorbate peroxidase (APX) and superoxide dismutase (SOD) activities.But malondialdehyde (MDA) content fluctuated.CAT activity decreased with the increase of heavy metal concentration.Relative permeability of Lythrum salicaria cell membrane increased with increasing of Hg or Cd concentration.Hg²⁺ and Cd²⁺ combined pollution were heavier pollution than that of Hg²⁺ and Cd²⁺ stress.In conclusion,Lythrum salicaria could adapt to heavy metal,especially for Hg and Cd,by regulating the antioxidant system.Lythrum salicaria had potential extensive application prospects in the environmental governance and landscaping.

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备注/Memo

第一作者简介：张秀娟（1979-），女，博士，讲师，研究方向为园林植物应用和生态系统恢复。E-mail：zxj510@yahoo.com.cn.
责任作者：吴楚（1965-），男，博士，教授，研究方向为生态系统恢复。
基金项目：国家自然科学基金资助项目（31200348）。
收稿日期：2013-05-06

更新日期/Last Update: 2014-08-14