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Journal of Zhejiang University SCIENCE B 2007 Vol.8 No.2 P.111~115


Zinc adsorption and desorption characteristics in root cell wall involving zinc hyperaccumulation in Sedum alfredii Hance

Author(s):  LI Ting-qiang, YANG Xiao-e, MENG Fan-hua, LU Ling-li

Affiliation(s):  Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   litq76@163.com, xyang@zju.edu.cn

Key Words:  Adsorption, Desorption, Hyperaccumulator, Sedum alfredii Hance, Zn

LI Ting-qiang, YANG Xiao-e, MENG Fan-hua, LU Ling-li. Zinc adsorption and desorption characteristics in root cell wall involving zinc hyperaccumulation in Sedum alfredii Hance[J]. Journal of Zhejiang University Science B, 2007, 8(2): 111~115.

@article{title="Zinc adsorption and desorption characteristics in root cell wall involving zinc hyperaccumulation in Sedum alfredii Hance",
author="LI Ting-qiang, YANG Xiao-e, MENG Fan-hua, LU Ling-li",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Zinc adsorption and desorption characteristics in root cell wall involving zinc hyperaccumulation in Sedum alfredii Hance
%A LI Ting-qiang
%A YANG Xiao-e
%A MENG Fan-hua
%A LU Ling-li
%J Journal of Zhejiang University SCIENCE B
%V 8
%N 2
%P 111~115
%@ 1673-1581
%D 2007
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.B0111

T1 - Zinc adsorption and desorption characteristics in root cell wall involving zinc hyperaccumulation in Sedum alfredii Hance
A1 - LI Ting-qiang
A1 - YANG Xiao-e
A1 - MENG Fan-hua
A1 - LU Ling-li
J0 - Journal of Zhejiang University Science B
VL - 8
IS - 2
SP - 111
EP - 115
%@ 1673-1581
Y1 - 2007
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2007.B0111

Radiotracer techniques were employed to characterize 65zn adsorption and desorption in root-cell-wall of hyperaccumulating ecotype (HE) and non-hyperaccumulating ecotype (NHE) species of Sedum alfredii Hance. The results indicated that at the end of a 30 min short time radioisotope loading period, comparable amounts of 65zn were accumulated in the roots of the two ecotypes Sedum alfredii, whereas 2.1-fold more 65zn remains in NHE root after 45-min desorption. At the end of 60 min uptake period, no difference of 65zn accumulation was observed in undesorbed root-cell-wall of Sedum alfredii. However, 3.0-fold more 65zn accumulated in desorbed root-cell-wall of NHE. zn2+ binding in root-cell-wall preparations of NHE was greater than that in HE under high zn2+ concentration. All these results suggested that root-cell-wall of the two ecotypes Sedum alfredii had the same ability to adsorb zn2+, whereas the desorption characteristics were different, and with most of 65zn binding on root of HE being available for loading into the xylem, as a result, more 65zn was translocated to the shoot.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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