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镉与锌复合污染对栝楼幼苗生理特性的影响
引用本文:李珊,程舟,杨晓伶,朱云国,李彦.镉与锌复合污染对栝楼幼苗生理特性的影响[J].西北植物学报,2007,27(6):1191-1196.
作者姓名:李珊  程舟  杨晓伶  朱云国  李彦
作者单位:同济大学,生命科学与技术学院,上海,200092
基金项目:同济大学校科研和教改项目
摘    要:通过室内盆栽实验,研究镉(Cd)、锌(Zn)复合污染对栝楼(Trichosanthes kirilowii Maxim.)幼苗生理特性的影响.结果显示,随着Cd、Zn浓度的升高,叶绿素a、叶绿素b、总叶绿素、可溶性糖及紫外吸收物含量下降;超氧化物歧化酶(SOD)活性先升高再下降,过氧化物酶(POD)活性及类胡萝卜素含量呈升—降—升趋势;丙二醛(MDA)和可溶性蛋白含量分别呈S"型及倒N"型曲线变化.与对照相比,在不同浓度复合污染条件下,光合色素、可溶性糖、可溶性蛋白、紫外吸收物含量及SOD活性均有所下降,POD活性和MDA含量上升.研究表明,栝楼幼苗对Cd、Zn胁迫具有一定的耐受力,但高浓度Cd、Zn对幼苗正常生长有较为显著的抑制作用.

关 键 词:栝楼      复合污染  生理特性
文章编号:1000-4025(2007)06-1191-06
修稿时间:2006-11-30

Physiological Response of Trichosanthes kirilowii Seedlings to Cd and Zn Combined Pollution in Soil
LI Shan,CHENG Zhou,YANG Xiao-ling,ZHU Yun-guo,LI Yan.Physiological Response of Trichosanthes kirilowii Seedlings to Cd and Zn Combined Pollution in Soil[J].Acta Botanica Boreali-Occidentalia Sinica,2007,27(6):1191-1196.
Authors:LI Shan  CHENG Zhou  YANG Xiao-ling  ZHU Yun-guo  LI Yan
Institution:School of Life Science and Technology, Tongji University, Shanghai 200092, China
Abstract:Effects of Cd and Zn combined pollution on the physiological characteristics of Trichosanthes kirilowii Maxim.seedlings were analyzed with the pot experiments.The results showed that the chlorophyll a,b and total chlorophyll contents,soluble saccharide and UV-B absorbing compound contents decreased along with the increase of Cd and Zn combined pollution concentration.Activity of superoxide dismutase(SOD) increased and then decreased whereas both peroxides(POD) activity and carotenoid content increased,then decreased and finally increased.Also,"S"-shaped and upside-down "N"-shaped curvaceous relationships were revealed between the malondialdehyde(MDA),soluble protein and Cd and Zn combined pollution concentration,respectively.Compared with the control group,a decrease in the contents of chlorophyll,soluble saccharide and protein,UV-B absorbing compound and the activity of SOD,and a rise in POD activity and MDA content were displayed.This study indicated a certain level of tolerance of T.kirilowii seedlings to Cd and Zn stresses,though high Cd and Zn concentrations obviously inhibited their normal growth.
Keywords:Trichosanthes kirilowii Maxim    Cd  Zn  combined pollution  physiological characteristics
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