福建农业学报2016，Vol.31Issue(6)：591-595,5.DOI:10.19303/j.issn.1008-0384.2016.06.007
镉胁迫对水仙根系抗氧化系统的影响
Cadmium-induced Peroxidation and Production of Sulfur-related Complex in Roots of Nardissus tazetta var.chinensis
摘要
Abstract
Effect of varied concentrations (i.e.,0,0.5,2,4,8,and 25 mg · L-1 )of cadmium (Cd)on the membrane lipid peroxidation,superoxide dismutase (SOD),peroxidase (POD),non-protein sulfydryl (NPT),and glutathione (GSH )in the roots of daffodil,Narcissus tazetta var.chinensis,were studied with a hydroponic culture.The study aimed to gain information for the cultivation,as well as selection of appropriate phytoremediation on the heavy metal stresses for the plants.It was found that (a)the content of root malondialdehyde (MDA) increased as Cd concentration increased;(b)at 4 - 25 mg · L-1 ,Cd induced a significant increase on hydrogen peroxidein the roots;(c )as Cd concentration increased,SOD activity decreased initially and followed by an increase,while POD decreased continuously with a significantly lower level than that of control when Cd concentration reached 4-25 mg·L-1 ;(d)GSH greatly increased with 8-25 mg·L-1 Cd,while NPT drastically decreased with the presence of 0.5 mg·L-1 or 25 mg·L-1 Cd.It appeared that,even at low level,Cd already imposed oxidative stress on daffodil.As Cd concentration increased,the stress worsened.Underprolonged Cd stress,the anti-oxidation enzymatic activity was suppressed resulting in a lowered capacity of the plants to resist the stress.On the other hand,when encountered high Cd stress,the daffodil plant would synthesize GSH to improve its resistance to the adverse condition.关键词
中国水仙/镉胁迫/过氧化作用/巯基Key words
Narcissus tazetta/cadmium stress/peroxidation/thiol分类
资源环境引用本文复制引用
张琼,陆銮眉,戴清霞,朱丽霞,郑海燕..镉胁迫对水仙根系抗氧化系统的影响[J].福建农业学报,2016,31(6):591-595,5.基金项目
福建省教育厅中青年教师教育科研项目（JA15322）；闽南师范大学博士科研启动项目（2006L21432）；闽南师范大学园林植物生长发育与生态配置校级创新团队项目 （）
