Back to Search
Start Over
Calcium protects roots of Sedum alfredii H. against cadmium-induced oxidative stress.
- 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.)
- Subjects :
- Cadmium chemistry
Calcium chemistry
Cell Membrane drug effects
Glutathione metabolism
Lipid Peroxidation drug effects
Microscopy, Electron, Transmission
Oxidative Stress drug effects
Peroxidase metabolism
Plant Roots drug effects
Plant Roots metabolism
Plant Roots ultrastructure
Protective Agents chemistry
Reactive Oxygen Species metabolism
Sedum metabolism
Sedum ultrastructure
Soil chemistry
Soil Pollutants chemistry
Superoxide Dismutase metabolism
Cadmium toxicity
Calcium pharmacology
Protective Agents pharmacology
Sedum drug effects
Soil Pollutants toxicity
Subjects
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