Cadmium-induced oxidative damage in rice leaves is reduced by polyamines
Resource
Plant and Soil 291 (1-2): 27-37
Journal
Plant and Soil
Pages
27-37
Date Issued
2007
Date
2007
Author(s)
Hsu, Yi Ting
Kao, Ching Huei
Abstract
The protective effect of polyamines against Cd toxicity of rice (Oryza sativa) leaves was investigated. Cd toxicity to rice leaves was determined by the decrease in protein content. CdCl2 treatment results in (1) increased Cd content, (2) induction of Cd toxicity, (3) increase in H 2O2 and malondialdehyde (MDA) contents, (4) decrease in ascorbic acid (ASC) and reduced glutathione (GSH) contents, and (5) increase in the activities of antioxidative enzymes (superoxide dismutase, glutathione reductase, ascorbate peroxidase, catalase, and peroxidase). Spermidine (Spd) and spermine (Spm), but not putrescine (Put), were effective in reducing CdCl 2-induced toxicity. Spd and Spm prevented CdCl2-induced increase in the contents of H2O2 and MDA, decrease in the contents of ASC and GSH, and increase in the activities of antioxidative enzymes. Spd and Spm pretreatments resulted in a decrease in Cd content when compared with H2O pretreatment, indicating that Spd and Spm may reduce the uptake of Cd. Results of the present study suggest that Spd and Spm are able to protect Cd-induced oxidative damage and this protection is most likely related to the avoidance of H2O2 generation and the reduction of Cd uptake. © 2007 Springer Science+Business Media B.V.
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journal article
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