| 1,4-二氯苯对小白菜种子萌发和幼苗的毒性 |
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| 引用本文： | 石 瑛,杜青平,李 砧.1,4-二氯苯对小白菜种子萌发和幼苗的毒性[J].环境科学研究,2011,24(10):1178-1184. |
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| 作者姓名： | 石 瑛 杜青平 李 砧 |
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| 作者单位： | 1.太原师范学院生物系, 山西 太原 030031 |
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| 基金项目： | 国家自然科学基金项目(40971251); 山西省高校高新技术产业化项目(2010019); 山西省基础研究项目(青年基金)(2010021027-1) |
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| 摘 要： | 采用室内模拟染毒法，研究1,4-DCB(1,4-二氯苯)对3种小白菜种子(矮青6号、上海青和秦白2号)萌发和蔬菜幼苗的毒性作用. 结果表明:1,4-DCB作用后，3种小白菜种子的发芽势、种子发芽率、发芽指数和活力指数均降低，并呈现一定的剂量-效应关系；种子受1,4-DCB胁迫后，小白菜幼苗的根和苗生长都受到了抑制，根长和苗高降低，根苗比显著下降；随着ρ(1,4-DCB)的升高，受胁迫后的幼苗叶片的w(游离脯氨酸)呈现先升高后降低的趋势，而MDA(丙二醛)含量逐渐升高，与ρ(1,4-DCB)呈正相关；幼苗叶片SOD(超氧化物歧化酶)活性在ρ(1,4-DCB)为5 mg/L时升高，在ρ(1,4-DCB)为10和50 mg/L时明显降低；与对照组相比，各处理组幼苗叶片POD(过氧化物酶)活性均升高，但是ρ(1,4-DCB)为50mg/L时酶活性比ρ(1,4-DCB)为10 mg/L时下降. 表明水体中1,4-DCB污染对蔬菜种子萌发和幼苗生长产生毒性，其毒性机制与膜脂质过氧化有关.
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| 关 键 词： | 1 4-二氯苯 蔬菜种子 萌发 毒性 |
| 收稿时间： | 2010/12/24 0:00:00 |
| 修稿时间： | 2011/4/3 0:00:00 |
Toxicity of 1,4-Dichlorobenzene on Seed Germination and Seedling Growth of Three Pai-Tsai (Brassica chinensis L.) |
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| SHI Ying,DU Qing-ping and LI Zhen.Toxicity of 1,4-Dichlorobenzene on Seed Germination and Seedling Growth of Three Pai-Tsai (Brassica chinensis L.)[J].Research of Environmental Sciences,2011,24(10):1178-1184. |
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| Authors: | SHI Ying DU Qing-ping and LI Zhen |
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| Institution: | 1.Department of Biology, Taiyuan Normal University, Taiyuan 030031, China2.〗Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China |
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| Abstract: | The effects of 1,4-dichlorobenzene(1,4-DCB) on seed germination and seedling toxicity of three pai-tsai(Brassica chinensis L.)(Aiqing #6,Shanghaiqing,Qinbai #2) were studied through simulation experiments in a laboratory.The results showed that the germination energies and germination rates of the three pai-tsai seeds in the groups treated with 1,4-DCB were decreased in a concentration-response manner,as were germination and vigor indices.The lengths of the roots and the heights of the seedlings were decrea... |
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| Keywords: | 1 4-dichlorobenzene(1 4-DCB) vegetable seeds germination toxicity |
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