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Influences of magnesium deficiency and cerium on antioxidant system of spinach chloroplasts.
- Source :
-
Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine [Biometals] 2009 Dec; Vol. 22 (6), pp. 941-9. - Publication Year :
- 2009
-
Abstract
- Magnesium-deficiency conditions applied to spinach cultures caused an oxidative stress status in spinach chloroplast monitored by an increase in reactive oxygen species (ROS) accumulation. The enhancement of lipids peroxide of spinach chloroplast grown in magnesium-deficiency media suggested an oxidative attack that was activated by a reduction of antioxidative defense mechanism measured by analysing the activities of superoxide dismutase, catalase, ascorbate peroxidase, guaiacol peroxidase, and glutathione reductase, as well as antioxidants such as carotenoids and glutathione content. As the antioxidative response of chloroplast was reduced in spinach grown in magnesium-deficiency media, it caused a significant reduction of spinach plant weight, old leaves turning chlorosis. However, cerium treatment grown in magnesium-deficiency conditions decreased the malondialdehyde and ROS, and increased activities of the antioxidative defense system, and improved spinach growth. Together, the experimental study implied that cerium could partly substitute for magnesium and increase the oxidative stress-resistance of spinach chloroplast grown in magnesium-deficiency conditions, but the mechanisms need further study.
- Subjects :
- Antioxidants pharmacology
Ascorbate Peroxidases
Catalase analysis
Catalase metabolism
Cerium metabolism
Glutathione analysis
Glutathione metabolism
Glutathione Reductase analysis
Glutathione Reductase metabolism
Lipid Peroxidation drug effects
Magnesium metabolism
Magnesium Deficiency metabolism
Malondialdehyde analysis
Oxidation-Reduction drug effects
Oxidative Stress drug effects
Peroxidase analysis
Peroxidase metabolism
Peroxidases analysis
Peroxidases metabolism
Plant Leaves metabolism
Reactive Oxygen Species metabolism
Spinacia oleracea
Superoxide Dismutase analysis
Superoxide Dismutase metabolism
Antioxidants metabolism
Cerium pharmacology
Chloroplasts metabolism
Magnesium pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1572-8773
- Volume :
- 22
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine
- Publication Type :
- Academic Journal
- Accession number :
- 19421874
- Full Text :
- https://doi.org/10.1007/s10534-009-9246-z