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首页> 外文期刊>Plant and Soil >Cadmium-induced oxidative damage in rice leaves is reduced by polyamines.
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Cadmium-induced oxidative damage in rice leaves is reduced by polyamines.

机译：多胺减少了镉诱导的水稻叶片的氧化损伤。

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摘要

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 H2O2 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 CdCl2-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..
机译：研究了多胺对水稻叶片Cd毒性的保护作用。镉对水稻叶片的毒性取决于蛋白质含量的降低。 CdCl2处理导致（1）Cd含量增加，（2）Cd毒性诱导，（3）H2O2和丙二醛（MDA）含量增加，（4）抗坏血酸（ASC）降低和谷胱甘肽（GSH）含量降低， （5）增加抗氧化酶的活性（超氧化物歧化酶，谷胱甘肽还原酶，抗坏血酸过氧化物酶，过氧化氢酶和过氧化物酶）。亚精胺（Spd）和亚精胺（Spm），而非腐胺（Put）有效降低CdCl2诱导的毒性。 Spd和Spm阻止了CdCl2诱导的H2O2和MDA含量增加，ASC和GSH含量减少以及抗氧化酶活性的增加。 Spd和Spm预处理与H2O预处理相比导致Cd含量降低，这表明Spd和Spm可能会减少Cd的吸收。本研究结果表明Spd和Spm能够保护Cd引起的氧化损伤，并且这种保护最有可能与避免H2O2产生和Cd吸收的减少有关。

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