| Role of salicylic acid in alleviating oxidative damage in rice roots (Oryza sativa) subjected to cadmium stress | |
| Guo, B.; Liang, Y. C.; Zhu, Y. G.; Zhao, F. J. | |
| 2007 | |
| 会议名称 | 22nd IUFRO World Forestry Congress |
| 会议日期 | AUG 08-13, 2005 |
| 会议地点 | Brisbane, AUSTRALIA |
| 关键词 | antioxidant system cadmium hydrogen peroxide rice salicylic acid |
| 英文摘要 | Time-dependent changes in enzymatic and non-enzymatic antioxidants, and lipid peroxidation were investigated in roots of rice (Oryza sativa) grown hydroponically with Cd, with or without pretreatment of salicylic acid (SA). Exposure to 50 mu M Cd significantly decreased root growth, and activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD), but increased the concentrations of H2O2, malondialdehyde (MDA), ascorbic acid (AsA), glutathione (GSH) and non-protein thiols (NPT). However, pretreatment with 10 mu M SA enhanced the activities of antioxidant enzymes and the concentrations of non-enzymatic antioxidants, but lowered the concentrations of H2O2 and MDA in the Cd-stressed rice compared with the Cd treatment alone. Pretreatment with SA alleviated the Cd-induced inhibition of root growth. The results showed that pretreatment with SA enhanced the antioxidant defense activities in Cd-stressed rice, thus alleviating Cd-induced oxidative damage and enhancing Cd tolerance. The possible mechanism of SA-induced H2O2 signaling in mediating Cd tolerance was discussed. (C) 2006 Elsevier Ltd. All rights reserved. |
| ISSN号 | 0269-7491 |
| 内容类型 | 会议论文 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/24720]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Guo, B.,Liang, Y. C.,Zhu, Y. G.,et al. Role of salicylic acid in alleviating oxidative damage in rice roots (Oryza sativa) subjected to cadmium stress[C]. 见:22nd IUFRO World Forestry Congress. Brisbane, AUSTRALIA. AUG 08-13, 2005. |
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