Hydroponic screening for metal resistance and accumulation of cadmium and zinc in twenty clones of willows and poplars

被引：209

作者：

Utmazian, Maria Noel Dos Santos ^{[1
]}

Wieshammer, Gerlinde ^{[1
]}

Vega, Rosa ^{[1
]}

Wenzel, Walter W. ^{[1
]}

机构：

[1] Univ Nat Resources & Appl Life Sci, Dept Forest & Soil Sci, A-1190 Vienna, Austria

来源：

ENVIRONMENTAL POLLUTION | 2007年 / 148卷 / 01期

关键词：

phytoremediation; Salix; Populus; cadmium; zinc;

D O I：

10.1016/j.envpol.2006.10.045

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We screened 20 different clones of willow and poplar species in hydroponic experiments for their metal resistance and accumulation properties. Plants were exposed for 4 weeks either to single additions of (mu M) 4.45 Cd or 76.5 Zn, or a metal cocktail containing the same amounts of Cd and Zn along with 7.87 Cu and 24.1 Ph. Plant biomass, metal tolerance and metal accumulation pattern in roots and leaves varied greatly between clones. The leaf:root ratio of metal concentrations was clearly underestimated compared to soil experiments. The largest metal concentrations in leaves were detected in Salix dasyclados (315 mg Cd kg(-1) d.m.) and a Salix smithiana clone (3180 mg Zn kg(-1) d.m.) but these species showed low metal tolerance. In spite of smaller Cd and Zn concentrations, the metal-tolerant clones Salix matsudana, Salix fragilis-1, and Salix purpurea-l hold promise for phytoextraction as they produced large biomass and metal contents in leaves. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：155 / 165

页数：11

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