文献类型： 外文期刊

作者： Tan, Cai-yun ¹ ; Shan, Xiao-quan ² ; Xu, Guo-zhong ³ ; Lin, Yu-Man ¹ ; Chen, Zu-liang ¹ ;

作者机构： 1.Fujian Normal Univ, Sch Chem & Mat Sci, Fuzhou 350007, Peoples R China

2.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China

3.Fujian Acad Agr Sci, Azolla Res Ctr, Fuzhou 350013, Peoples R China

关键词： Phytoaccumulation;Cadmium;Ca(II) channel;Zinc transporter

期刊名称：ECOLOGICAL ENGINEERING （ 影响因子：4.035； 五年影响因子：4.611 ）

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收录情况： SCI

摘要： Azolla, which is an aquatic fern, has proved to be effective in the uptake and accumulation of metals from polluted waters. Azolla spp., namely A. microphylla cv. MH3 and A caroliniana Willd, were chosen as model plants so that Cd(II) could be accumulated from aqueous solution. An increase in uptake time and the concentration of Cd(II) in aqueous solution resulted in more Cd(II) accumulation in both species. Modified Michaelis-Menten equation was employed to describe the concentration-dependent kinetics of Cd(II) uptake through the roots of A microphylla cv. MH3, and the values of K_m and V_(max) were found to be 0.23 mg/L and 16.49 μg/(g.f.wt.h), respectively. Cd(II) uptake by A microphylla cv. MH3 occurs partly through Ca(II) channels and has the potential to be mediated by Zn(II) transporters.