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Cadmium Accumulation and Tolerance in Seven Ornamental Willow Genotypes

文献类型： 外文期刊

作者： Yang, Weidong 1 ; Wu, Feifei 1 ; Ding, Zheli 1 ; Zhang, Xincheng 1 ; Zhao, Fengliang 1 ; Wang, Yuyan 1 ; Yang, Xiaoe 1 ;

作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, Minist Educ, Key Lab Environm Remediat & Ecol Hlth, Hangzhou 310058, Zhejiang, Peoples R China

2.Chinese Acad Trop Agr Sci CATAS, Haikou Expt Stn, Haikou, Hainan, Peoples R China

3.Chinese Acad Trop Agr Sci CATAS, Minist Agr, Danzhou Sci Observing & Expt Stn Agroenvironm, Environm & Plant Protect Inst, Haikou, Hainan, Peoples R China

4.Jiujiang Vocat Univ, Coll Agr Econ & Technol, Jiujiang, Peoples R China

关键词： Salix genotypes; Cadmium; Hydroponic culture; Phytoremediation

期刊名称：BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY （ 影响因子：2.151； 五年影响因子：2.129 ）

ISSN： 0007-4861

年卷期： 2018 年 101 卷 5 期

页码：

收录情况： SCI

摘要： Cadmium (Cd) accumulation and tolerance in seven ornamental willow genotypes were investigated at different Cd levels (0, 5, 25, 50, and 100 mu M) through hydroponic culture in a greenhouse. Severe phytotoxic symptoms in leaves and roots including leaf chlorosis and root browning were noticed when grown at 50 mu M Cd. All genotypes showed high tolerance to low Cd levels (5 mu M and 25 mu M Cd), in contrast to high Cd levels (i.e. 50 mu M and 100 mu M) that severely disturbed plant growth of all genotypes. Cadmium concentrations reached 165.0-1251.0 mu gg(-1) DW in leaves, 22.9-331.2 mu gg(-1) in stems among the genotypes at 5-25 mu M Cd, and Cd mainly accumulated in the roots. Although willow tissues can accumulate relatively high Cd concentrations under high Cd levels (50 mu M), they are not suitable for phytoextraction of Cd due to poor growth.

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