| 垃圾填埋场渗滤液尾水灌溉下百慕大草抗氧化系统的反应 |
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| 引用本文： | 王如意,何品晶,邵立明,张斌,李国建.垃圾填埋场渗滤液尾水灌溉下百慕大草抗氧化系统的反应[J].应用生态学报,2005,16(5):933-938. |
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| 作者姓名： | 王如意 何品晶 邵立明 张斌 李国建 |
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| 作者单位： | 同济大学污染控制与资源化研究国家重点实验室,上海,200092 |
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| 基金项目： | 国家高技术研究发展计划资助项目(2001AA644010、2003AA644020). |
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| 摘 要： | 通过盆栽试验，研究了渗滤液尾水灌溉下百慕大草的膜脂过氧化及酶促、非酶促抗氧化系统的反应.结果表明，低稀释比的渗滤液尾水(<25%)灌溉下,随着稀释比增大，百慕大草叶绿素a/b提高，丙二醛（MDA）、H2O2含量及膜透性降低，膜脂过氧化水平较轻；但中、高稀释比 (＞25%)下,随稀释比的增大则显示出一定的负效应，表现为叶绿素a/b降低，MDA、H2O2含量及膜透性提高，从而导致膜脂过氧化水平提高.非酶抗氧化剂抗坏血酸（AsA）、还原型谷胱甘肽（GSH）、类胡萝卜素（Car）含量的变化趋势相同，即低稀释比下含量升高，中高稀释比胁迫下明显降低.抗氧化酶中，超氧化物岐化酶（SOD）和过氧化物酶（POD）的活性变化同抗氧化剂变化趋势相似，但POD对胁迫的反应更敏感；而过氧化氢酶（CAT）活性变化趋势则先减弱后增强；MDA含量和抗氧化剂含量、抗氧化酶SOD、POD活性间的显著负相关，表明3种抗氧化剂和SOD、POD在防止百慕大草膜脂过氧化上可能起到更重要的作用.
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| 关 键 词： | 渗滤液尾水 抗氧化系统 膜脂过氧化 百慕大草 灌溉 |
| 文章编号： | 1001-9332(2005)05-0933-06 |
| 收稿时间： | 2004-04-20 |
| 修稿时间： | 2004年4月20日 |
Responses of antioxidation system of Cynodon dactylon to recirculated landfill leachate irrigation |
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| WANG Ruyi,HE Pinjing,SHAO Liming,ZHANG Bin,Li Guojian.Responses of antioxidation system of Cynodon dactylon to recirculated landfill leachate irrigation[J].Chinese Journal of Applied Ecology,2005,16(5):933-938. |
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| Authors: | WANG Ruyi HE Pinjing SHAO Liming ZHANG Bin Li Guojian |
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| Affiliation: | State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China. ruyiwang@ah163.com |
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| Abstract: | With pot experiment,this paper studied the membrane lipid peroxidation and the variations of antioxidation system in Cynodon dactylon under recirculated landfill leachate irrigation.The results showed that when irrigated with low dilution ratio (<25%) leachate,the chlorophyll a/b ratio increased with increasing dilution ratio,cell membrane permeability and MDA and H 2O 2 contents were in adverse,and membrane lipid peroxidation was relatively weak.However,with the increasing leachate dilution ratio (>25%),there existed an obvious negative effect on Cynodon dactylon,i.e.,the chlorophyll a/b ratio decreased,while cell membrane permeability and MDA and H 2O 2 contents increased,which meant that the membrane lipid peroxidation was accelerated.The contents of antioxidants AsA,GSH and Car also showed the similar trend,i.e.,they increased with increasing leachate dilution ratio when irrigated with low dilution ratio leachate,but decreased under medium or high dilution ratio leachate irrigation.Among three test anti-oxidative enzymes,SOD and POD activities showed a similar change to test antioxidants,and POD activity was more sensitive,while CAT activity was on the contrary.The contents of test antioxidants and the activities of SOD and POD were negatively and significantly correlated to MDA content,indicating that they might play an important role in preventing Cynodon dactylon from cell membrane lipid peroxdation. |
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| Keywords: | Recirculated landfill leachate Antioxidant system Membrane lipid peroxidation Cynodon dactylon Irrigation |
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