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Calcium protects roots of Sedum alfredii H. against cadmium-induced oxidative stress.

Authors :
Tian S
Lu L
Zhang J
Wang K
Brown P
He Z
Liang J
Yang X
Source :
Chemosphere [Chemosphere] 2011 Jun; Vol. 84 (1), pp. 63-9. Date of Electronic Publication: 2011 Mar 21.
Publication Year :
2011

Abstract

Sedum alfredii is a well-known Cd (cadmium) hyperaccumulator native to China. The impacts of exogenous Ca on Cd-induced oxidative stress and antioxidant systems in roots of S. alfredii were investigated by using cellular and biochemical approaches. Supplementation of the medium with higher Ca levels resulted in alleviated growth inhibition and decreased Cd concentration, as well as increased Ca concentration in roots. Cadmium induced lipid peroxidation and loss of plasma membrane integrity, reactive oxygen species overproduction, as well as ultrastructural changes of root cells were largely reversed by Ca supplementation in the medium. Calcium application significantly altered the Cd effects on antioxidant enzymes and non-enzyme antioxidants (non-protein thiols), and significantly increased glutathione (GSH) biosynthesis. The results suggest that Ca is able to protect the roots of S. alfredii against Cd toxicity by restoration of Cd-displaced Ca, alleviation of the metal induced oxidative stress, as well as promotion of GSH biosynthesis.<br /> (Copyright © 2011 Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1879-1298
Volume :
84
Issue :
1
Database :
MEDLINE
Journal :
Chemosphere
Publication Type :
Academic Journal
Accession number :
21421252
Full Text :
https://doi.org/10.1016/j.chemosphere.2011.02.054