Antioxidative defense and proline/phytochelatin accumulation in a newly discovered Cd-hyperaccumulator, Solanum nigrum L.
文献类型：期刊论文
| 作者 | Sun, RL; Zhou, QX; Sun, FH; Jin, CX; Zhou, QX, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Proc, Shenyang 110016, Peoples R China |
| 刊名 | ENVIRONMENTAL AND EXPERIMENTAL BOTANY
 |
| 出版日期 | 2007 |
| 卷号 | 60期号:3页码:468-476 |
| 关键词 | Antioxidant Enzyme Cadmium Free Proline Hyperaccumulator Phytochelatin Solanum Nigrum Tolerance |
| ISSN号 | 0098-8472 |
| 英文摘要 | Changes in the activity of antioxidant enzymes including superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and the contents of malondialdehyde (MDA), chlorophyll, free proline and phytochelatins (PCs) in Solanum nigrum, the newly discovered Cd-hyperaccumulator were examined and compared with a non-hyperaccumulator Solanum melongena. It was indicated that leaf SOD and POD activity of S. nigrum was significantly higher than that of S. melongena. The Cd treatments significantly increased root SOD activity, leaf POD activity, and CAT activity and free proline content in the leaves and roots of S. nigrum. On the contrary, the Cd treatments decreased SOD activity, and did not change CAT activity in the leaves and roots of S. melongena. Moreover, there were no significant differences in free proline levels in the roots of S. melongena. These results validated that S. nigrum had a greater capacity than S. melongena to adapt to oxidative stress caused by Cd and free proline accumulation might be responsible for the tolerance of S. nigrum to Cd. Treated with 10 mu g Cd g(-1), growth of S. nigrum and its contents of chlorophyll and MDA were basically unaffected. In contrast, there were a decrease in the growth and chlorophyll content, and an increase in MDA in the roots of S. melongena. Although lipid peroxidation was promoted in both the hyperaccumulator and non-hyperaccumulator by high Cd stress, the greater increase took place in the tissues of S. melongena. The PCs level in roots of S. nigrum was significantly lower than that of S. melongena. On the contrary, the content of leaf PCs was much higher in S. nigrum than that in S. melongena. These results further suggested that antioxidative defense in the Cd-hyperaccumulator might play an important role in Cd tolerance, and PCs synthesis is not the primary reason for Cd tolerance although PCs in S. nigrum increased significantly by Cd. (C) 2007 Elsevier B.V. All rights reserved. |
| 学科主题 | Plant Sciences ; Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000248365700022 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/54683]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所 |
| 通讯作者 | Zhou, QX, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Proc, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, RL,Zhou, QX,Sun, FH,et al. Antioxidative defense and proline/phytochelatin accumulation in a newly discovered Cd-hyperaccumulator, Solanum nigrum L.[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2007,60(3):468-476. |
| APA | Sun, RL,Zhou, QX,Sun, FH,Jin, CX,&Zhou, QX, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Proc, Shenyang 110016, Peoples R China.(2007).Antioxidative defense and proline/phytochelatin accumulation in a newly discovered Cd-hyperaccumulator, Solanum nigrum L..ENVIRONMENTAL AND EXPERIMENTAL BOTANY,60(3),468-476. |
| MLA | Sun, RL,et al."Antioxidative defense and proline/phytochelatin accumulation in a newly discovered Cd-hyperaccumulator, Solanum nigrum L.".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 60.3(2007):468-476. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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