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Antioxidative and growth-promoting effect of selenium on senescing lettuce
文献类型：期刊论文
| 作者 | Xue, TL; Hartikainen, H; Piironen, V |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2001-11-01 |
| 卷号 | 237期号:1页码:55-61 |
| 关键词 | Antioxidant Gsh-px Lettuce Selenium Senescence Sod Tocopherol |
| 文献子类 | Article |
| 英文摘要 | In human and animal cells, Se plays an essential role in antioxidation and exerts an antiaging function but it is toxic at high dietary intake. To increase its intake in forage and foodstuffs, Se fertilization is adopted in some countries where soils are low in bioavailable Se, even though higher plants are regarded not to require Se. To test its ability to counteract senescence-related oxidative stress in higher plants, a pot experiment was carried out with lettuce (Lactuca sativa) cultivated with increasing amounts of H(2)SeO(4). The yields harvested 7 or 14 weeks after sowing revealed that a low Se dosage (0.1 mg kg(-1) soil) stimulated the growth of senescing seedlings (dry weight yield by 14%) despite a decreased chlorophyll concentration. The growth-promoting function was related to diminished lipid peroxidation. In young and senescing plants, the antioxidative effect of Se was associated with the increased activity of glutathione peroxidase (GSH-Px). In the senescing plants, the added Se strengthened the antioxidative capacity also by preventing the reduction of tocopherol concentration and by enhancing superoxide dismutase (SOD) activity. When no Se was added, tocopherols and SOD activity diminished during plant senescence. The higher Se dosage (1.0 mg kg(-1) soil) was toxic and reduced the yield of young plants. In the senescing plants, it diminished the dry weight yield but not the fresh weight yield. |
| WOS关键词 | WHITE-MUSCLE DISEASE ; IODOTHYRONINE DEIODINASE ; GLUTATHIONE-PEROXIDASE ; PLANT-GROWTH ; VITAMIN-E ; SELENOPROTEIN ; ETHYLENE ; TISSUE ; PURIFICATION ; IRRADIATION |
| 语种 | 英语 |
| WOS记录号 | WOS:000172861900006 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/68307]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Hartikainen, H |
| 作者单位 | 1.Univ Helsinki, Dept Appl Chem & Microbiol, SF-00014 Helsinki, Finland 2.Chinese Acad Sci, Inst Geog, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue, TL,Hartikainen, H,Piironen, V. Antioxidative and growth-promoting effect of selenium on senescing lettuce[J]. PLANT AND SOIL,2001,237(1):55-61. |
| APA | Xue, TL,Hartikainen, H,&Piironen, V.(2001).Antioxidative and growth-promoting effect of selenium on senescing lettuce.PLANT AND SOIL,237(1),55-61. |
| MLA | Xue, TL,et al."Antioxidative and growth-promoting effect of selenium on senescing lettuce".PLANT AND SOIL 237.1(2001):55-61. |
入库方式： OAI收割
来源：地理科学与资源研究所
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