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Journal of Zhejiang University SCIENCE B 2008 Vol.9 No.3 P.243~249

10.1631/jzus.B0710624


Differential generation of hydrogen peroxide upon exposure to zinc and cadmium in the hyperaccumulating plant specie (Sedum alfredii Hance)


Author(s):  Yue-en CHAO, Min ZHANG, Sheng-ke TIAN, Ling-li LU, Xiao-e YANG

Affiliation(s):  MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   xyang@zju.edu.cn

Key Words:  Hydrogen peroxide (H2O2), Glutathione (GSH), Sedum alfredii Hance, Zinc (Zn), Cadmium (Cd), Hyperaccumulator


Yue-en CHAO, Min ZHANG, Sheng-ke TIAN, Ling-li LU, Xiao-e YANG. Differential generation of hydrogen peroxide upon exposure to zinc and cadmium in the hyperaccumulating plant specie (Sedum alfredii Hance)[J]. Journal of Zhejiang University Science B, 2008, 9(3): 243~249.

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author="Yue-en CHAO, Min ZHANG, Sheng-ke TIAN, Ling-li LU, Xiao-e YANG",
journal="Journal of Zhejiang University Science B",
volume="9",
number="3",
pages="243~249",
year="2008",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B0710624"
}

%0 Journal Article
%T Differential generation of hydrogen peroxide upon exposure to zinc and cadmium in the hyperaccumulating plant specie (Sedum alfredii Hance)
%A Yue-en CHAO
%A Min ZHANG
%A Sheng-ke TIAN
%A Ling-li LU
%A Xiao-e YANG
%J Journal of Zhejiang University SCIENCE B
%V 9
%N 3
%P 243~249
%@ 1673-1581
%D 2008
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0710624

TY - JOUR
T1 - Differential generation of hydrogen peroxide upon exposure to zinc and cadmium in the hyperaccumulating plant specie (Sedum alfredii Hance)
A1 - Yue-en CHAO
A1 - Min ZHANG
A1 - Sheng-ke TIAN
A1 - Ling-li LU
A1 - Xiao-e YANG
J0 - Journal of Zhejiang University Science B
VL - 9
IS - 3
SP - 243
EP - 249
%@ 1673-1581
Y1 - 2008
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B0710624


Abstract: 
Sedum alfredii Hance has been identified as zinc (Zn) and cadmium (Cd) co-hyperaccumulator. In this paper the relationships of Zn or Cd hyperaccumulation to the generation and the role of H2O2 in Sedum alfredii H. were examined. The results show that Zn and Cd contents in the shoots of Sedum alfredii H. treated with 1000 μmol/L Zn2+ and/or 200 μmol/L Cd2+ increased linearly within 15 d. Contents of total S, glutathione (GSH) and H2O2 in shoots also increased within 15 d, and then decreased. Total S and GSH contents in shoots were higher under Cd2+ treatment than under Zn2+ treatment. However, reverse trends of H2O2 content in shoots were obtained, in which much higher H2O2 content was observed in Zn2+-treated shoots than in Cd2+-treated shoots. Similarly, the microscopic imaging of H2O2 accumulation in leaves using H2O2 probe technique showed that much higher H2O2 accumulation was observed in the Zn2+-treated leaf than in the Cd2+-treated one. These results suggest that there are different responses in the generation of H2O2 upon exposure to Zn2+ and Cd2+ for the hyperaccumulator Sedum alfredii H. And this is the first report that the generation of H2O2 may play an important role in Zn hyperaccumulation in the leaves. Our results also imply that GSH may play an important role in the detoxification of dissociated Zn/Cd and the generation of H2O2.

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

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