中文摘要：

为探明超富集植物欧洲千里光幼苗对镉（Cd）胁迫在生理生化方面的响应,采用人工水培的方式,研究了不同Cd浓度胁迫下,欧洲千里光幼苗（Senecio vulgaris L.）在24-72h的生理生化指标（叶绿素、丙二醛、电解质渗透率、过氧化物酶活性）变化,结果表明：不同浓度的Cd2＋（25-75mg·L-1）对幼苗的叶绿素含量、丙二醛（MDA）含量、过氧化物酶（POD）活性均具有显著影响（在75mg·L-1的Cd2＋胁迫下,其含量分别达到对照的45.9%,680%和155%）。随着Cd2＋浓度的升高,叶绿素含量逐渐下降,MDA含量、POD活性和电解质渗透率则一直随着Cd2＋浓度的升高而增大。欧洲千里光对镉具有很强的耐性和积累性,在用于镉污染的土壤修复中具有潜在的应用价值。

英文摘要：

To study the effects of different Cd concentrations on the leaf physiological and biochemical indices, the plants of S.vulgaris were exposed to Hoagland solution with 25-75mg·L-1Cd Cl2 for 24-72 h, and chlorophyll（Chl）, malonialdehyde（MDA）,peroxidase（POD） and relative electrical conductivity were investigated. The results showed they had significant effects under different Cd treatments. Leaf chlorophyll a（Chla）, chlorophyll b（Chlb） and total chlorophyll（Chl） contents were decreased compared with the control, MDA contents, POD activities and relative electrical conductivity increased with Cd concentration all the time. When cadmium was 75mg·L-1, their contents were 45.9%, 680% and 155% of that of control, respectively. The results above indicated that Senecio vulgaris L has strong capacity of Cd tolerance and accumulation, so it has potential and valuable application to phytoremediation of contaminated soils by Cd.