铅、镉、铬单一和复合污染对青菜种子萌发的生物学效应

被引：117

作者：

任安芝

高玉葆

机构：

[1] 南开大学生物学系!天津

来源：

生态学杂志 | 2000年 / 01期

关键词：

lead; cadmium; chromium; Brassica chinensis L; EC; 50; ;

D O I：

10.13292/j.1000-4890.2000.0004

中图分类号：

X503.23 [植物];

学科分类号：

071012 ; 0713 ; 083002 ;

摘要：

Germiantion of Brassica chinensis L. grown in the solution with different concentrations of lead, cadmium and chromium (single and combinative) was investigated. Root lengths decreased with the increase of lead, cadmium and chromium in hydroponic solution. The physiological toxicity order for these three ions was Cr 6+ >Cd 2+ >Pb 2+ . The uptake of Pb by Brassica chinensis was enhanced with Pb addition. The toxicity of Cr and Pb was reduced due to precipitation of Cr 2O 7 2- and Pb 2+ . The toxicity of Cd to plant decreased when Cr 6+ was added.

引用

页码：19 / 22

页数：4