Phytoaccumulation of cadmium through Azolla from aqueous solution

文献类型： 外文期刊

第一作者： Tan, Cai-yun

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

作者机构：

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.

分类号： Q14

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