| 土霉素对小麦种子发芽与幼苗生长发育的生态毒性 |
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| 引用本文： | 安婧,周启星,刘维涛.土霉素对小麦种子发芽与幼苗生长发育的生态毒性[J].环境科学,2009,30(10):3022-3027. |
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| 作者姓名： | 安婧 周启星 刘维涛 |
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| 作者单位： | 1. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳,110016;中国科学院研究生院,北京,100049
2. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳,110016;南开大学环境科学与工程学院,环境污染过程与基准教育部重点实验室,天津,300071 |
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| 基金项目： | 国家重点基础研究发展规划(973)项目(2004CB418503);;国家自然科学基金项目(20777040) |
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| 摘 要： | 研究了土霉素对小麦种子发芽以及早期幼苗生长发育的生态毒性效应.结果表明,土霉素对小麦种子芽长及根长的抑制效应显著(p<0.01),而且它们之间具有良好的剂量-效应关系.根据线性回归方程得出土霉素对小麦种子芽长和根长的半抑制浓度为65.5 mg/L和34.7 mg/L.然而,土霉素对小麦种子的发芽率并没有显著的影响.研究还表明,0.15~2.4 mg/L土霉素暴露21 d后,小麦叶片中的叶绿素含量降低了35.6%~47.3%,叶片及根部的可溶性蛋白含量也均呈显著下降趋势.暴露7 d后,0.15~2.4 mg/L土霉素对小麦叶片和根部SOD与POD活性的抑制效应不显著,但随着暴露时间的延长,土霉素对小麦的SOD与POD酶活性抑制率显著下降;2.4 mg/L土霉素暴露21 d后,小麦根部的SOD活性下降72.3%,说明土霉素对小麦幼苗体内的抗氧化系统具有破坏作用.该实验结果显示,低浓度土霉素长期暴露对小麦幼苗的生长发育具有不良的生态毒性效应.
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| 关 键 词： | 土霉素 生态毒性效应 小麦 种子发芽 叶绿素 可溶性蛋白 抗氧化系统 |
| 收稿时间： | 2008/11/24 0:00:00 |
| 修稿时间： | 3/2/2009 12:00:00 AM |
Ecotoxicological Effects of Oxytetracycline on Wheat (Triticum aestivum) Based on Seed Germination and Seedling Development |
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| AN Jing,ZHOU Qi-xing and LIU Wei-tao.Ecotoxicological Effects of Oxytetracycline on Wheat (Triticum aestivum) Based on Seed Germination and Seedling Development[J].Chinese Journal of Environmental Science,2009,30(10):3022-3027. |
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| Authors: | AN Jing ZHOU Qi-xing and LIU Wei-tao |
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| Institution: | 1;2;1;3;1;2;1.Key Laboratory of Terrestrial Ecological Process;Institute of Applied Ecology;Chinese Academy of Sciences;Shenyang 110016;China;2.Graduate University of the Chinese Academy of Sciences;Beijing 100049;3.Key Laboratory of Pollution Processes and Environmental Criteria;Ministry of Education;College of Environmental Science and Engineering;Nankai University;Tianjin 300071;China |
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| Abstract: | The ecotoxicological effects of oxytetracycline(OTC) on the germination of wheat(Triticum aestivum) seeds and the early development of wheat seedlings were investigated.The results showed that the elongation of wheat shoots and roots was significantly(p<0.05) inhibited by OTC,and there was a good dose-response relationship between the OTC concentration and inhibition rates.According to the linear regression equation,EC_(50)of OTC for inhibiting wheat shoot and root elongation was 65.5(mg/L) and 34.7(mg/L),r... |
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| Keywords: | oxytetracycline ecotoxicologieal effect wheat (Triticum aestivum) seed germination chlorophyll soluble protein antioxidant defense systems |
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