| Effect of Rare Earths on Plants under Supplementary Ultraviolet-B Radiation： Ⅱ. Effect of Cerium on Antioxidant Defense System in Rape Seedlings under Supplementary Ultraviolet-B Radiation |
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| 引用本文： | 梁婵娟,黄晓华,陶文沂,周青.Effect of Rare Earths on Plants under Supplementary Ultraviolet-B Radiation： Ⅱ. Effect of Cerium on Antioxidant Defense System in Rape Seedlings under Supplementary Ultraviolet-B Radiation[J].中国稀土学报(英文版),2006,24(3):364-368. |
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| 作者姓名： | 梁婵娟 黄晓华 陶文沂 周青 |
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| 作者单位： | The Key Laboratory of Industrial Biotechnology Ministry of Education Wuxi 214036 China,College of Chemistry & Environmental Science Nanjing Normal University Nanjing 210097 China,The Key Laboratory of Industrial Biotechnology Ministry of Education Wuxi 214036 China,The Key Laboratory of Industrial Biotechnology Ministry of Education Wuxi 214036 China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （30570323, 20471030） and the Foundation of State Planning Committee （IFZ20051210） |
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| 摘 要： | Theincreaseingroundlevelultraviolet Bradi ation(UV B,280～320nm)asaresultofstrato sphericozonedepletionmayhavemajordeleteriousef fectsoncropphotosynthesisandproduction.Asone majorenvironmentalproblem,ithasattractedmore andmoreattentionofresearchers,andthereforethere havebeensubstantiveandtimelyreports,providing abundantinformationaboutthedamageofUV Bradi ationoncrops.However,thestudiesabouttheecolog icalprotectionofplantsagainstdamageofUV Bradi ationarecomparativelyfew.Wehavepreviouslyre p…
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| 关 键 词： | 铈 稀土 油菜 种子 保护酶 膜透性 |
| 文章编号： | 1002-0721（2006）03-0364-05 |
| 收稿时间： | 2005-06-10 |
| 修稿时间： | 2005-08-26 |
Effect of Rare Earths on Plants under Supplementary Ultraviolet-B Radiation: II. Effect of Cerium on Antioxidant Defense System in Rape Seedlings under Supplementary Ultraviolet-B Radiation |
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| Chanjuan , Xiaohua Huang, Wenyi Tao,Qing Zhou,.Effect of Rare Earths on Plants under Supplementary Ultraviolet-B Radiation: II. Effect of Cerium on Antioxidant Defense System in Rape Seedlings under Supplementary Ultraviolet-B Radiation[J].Journal of Rare Earths,2006,24(3):364-368. |
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| Authors: | Chanjuan Xiaohua Huang Wenyi Tao Qing Zhou |
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| Affiliation: | aThe Key Laboratory of Industrial Biotechnology, Ministry of Education, Wuxi 214036, China;bCollege of Chemistry & Environmental Science, Nanjing Normal University, Nanjing 210097, China |
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| Abstract: | Effects of cerium (Ce3+) on membranous protective enzymes in rape seedlings exposed to two levels of enhanced ultraviolet-B radiation (UV-B, 280  320 nm) were studied by hydroponics in the laboratory. The results show that the chlorophyll content decreases and membrane permeability increases in the leaves under UV-B irradiation with an intensity of 0.15 and 0.35 W·m−2. The activities of SOD, CAT and POD are first increased and then decreased in leaves exposed to a low level of UV-B radiation. POD activity in leaves exposed to a high level of UV-B radiation is enhanced constantly. The sensitivities of these enzymes to UV-B radiation are SOD > CAT > POD. The injury by UV-B radiation on the functions of protective enzymes is lightened, their ability to scavenge radicals is improved, and the membrane permeability is maintained by Ce. Furthermore, the protective effect of cerium is more obvious in plants exposed to low levels of UV-B radiation than to high levels of it. Accordingly, all results prove that the protective effect of Ce on plants under UV-B radiation is realized through the protective system of plants. |
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| Keywords: | cerium elevated UV-B radiation rape seedlings protective enzymes membrane permeability rare earths |
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