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当前位置: 首页 > 文章 > 蟛蜞菊对污泥重金属的响应、吸收与富集作用 安徽农业大学学报 2012,39 (2) 286-291
Position: Home > Articles > Wedelia trilobata's response to heavy metals and heavy metal absorption and enrichment in its body with sludge as a part of growth substrate Journal of Anhui Agricultural University 2012,39 (2) 286-291

蟛蜞菊对污泥重金属的响应、吸收与富集作用

作  者：
林茂兹;林能文;邱雪芬;张美燕
单  位：
福建师范大学福清分校生化系;福建省福清市环境保护局
关键词：
蟛蜞菊;重金属污染;植物修复;生物富集
摘  要：
植物修复(phytoremediation)是解决越来越突出的重金属污染问题的一种较好方法,成为生态学和环境学研究的重要课题。而植物对重金属的响应、吸收与富集作用是该课题的科学基础。为此,本研究采用盆栽实验方法,设定污泥与砂壤土的不同体积配比(0%污泥、10%污泥、20%污泥和40%污泥)作为生长基质,测定在含重金属基质中生长不同时间(3、4、5和6个月)的蟛蜞菊(Wedelia trilobata)叶片的生理指标(叶绿素含量、POD活性、SOD活性)和在含重金属基质中生长6个月后的蟛蜞菊根、茎、叶中重金属(Cd、Cr、Mn、Ni、Pb、Cu和Zn)含量。研究结果显示,总体上,蟛蜞菊叶片中叶绿素含量随着生长基质中污泥体积比例升高而显著(P<0.05)升高;随着生长基质中污泥体积比例升高,蟛蜞菊叶片中SOD活性、POD活性变化显著(P<0.05),在含重金属的生长基质中生长5个月后,SOD活性和POD活性都显著(P<0.05)下降;在含较高浓度的污泥重金属的生长基质(20%污泥和40%污泥处理)中生长6个月后,蟛蜞菊叶片中Ni、Cu、Cr含量较高。研究结果说明污泥对蟛蜞菊叶绿素含量有促进作用;蟛蜞菊对污泥重金属有较强的耐受性,叶片对Ni、Cu、Cr具有超富集作用。
译  名：
Wedelia trilobata's response to heavy metals and heavy metal absorption and enrichment in its body with sludge as a part of growth substrate
作  者：
LIN Mao-zi1,2,LIN Neng-wen3,QIU Xue-fen1,2,ZHANG Mei-yan1(1.Department of Biology and Chemical Engineering,Fujian Normal University,Fuqing 350300; 2.Institute of Environmental Protection,Fuqing Branch of Fujian Normal University,Fuqing 350300; 3.Fuqing Environmental Protection Bureau of Fujian Province,Fuqing 350300)
关键词：
Wedelia trilobata;heavy metal pollution;phytoremediation;bioaccumulation
摘  要：
Phytoremediation is a good method for solving more and more prominent heavy metal problems.However,plant's response to heavy metals and heavy metals accumulation in the plant's body are the basic scien-tific issues in this field.In order to reveal the response of Wedelia trilobata to heavy metals and its accumulation effect in sludge,a soil experiment was designed and carried out.The physiological indexes in the leaves of W.tri-lobata,including chlorophyll content,peroxidase(POD) activity,and superoxide dismutase(SOD) activity after planting in different ratios of sludge(containing heavy metals) to sandy soil for three,four,five and six months,were detected respectively.The metals content(Cd,Cr,Mn,Ni,Pb,Cu,Zn) in the leaves,roots,and stems of W.trilobata after planting in different ratios of the above growth substrate for six months,were also detected re-spectively.The results showed that the chlorophyll content in the leaves of W.trilobata significantly(P<0.05) as-cended with the increase of sludge proportion;the POD activity and SOD activity significantly(P<0.05) changed with the increase of sludge proportion,and both significantly(P<0.05) decreased after growth in the growth sub-strate;it also showed that the content of Ni,Cu and Cr in the leaves of W.trilobata were higher when grown in substrate with higher proportional sludge added(20% and 40% sludge).Our experiment suggest that the sludge is helpful to increase chlorophyll content in the leaves of W.trilobata,which has strong tolerance to sludge heavy metals,and it is a hyperaccumulator of Ni,Cu and Cr.

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