Cd

花匠小妙招
2024-11-04 12:54

第26卷第12期2006年12月环境科学学报ActaScientiaeCircumstantiaeVo.l26,No.12Dec.,2006

基金项目:国家/9730课题(No.2004CB418503);国家杰出青年科学基金B(No.20428707)SupportedbytheNationalKeyBasicResearchProgramofChina(No.2004CB418503)andtheNationalNaturalScienceFoundationofChinaforDistinguishedOverseasYoungScholars(No.20428707)作者简介:刘家女(1981)),女,博士研究生;*通讯作者(责任作者),E-mai:lZhouqx@iae.ac.cnBiography:LIUJian(1981)),female,Ph.D.Candidate;*Correspondingauthor,E-mai:lZhouqx@iae.ac.cn刘家女,周启星,孙挺.2006.Cd-Pb复合污染条件下3种花卉植物的生长反应及超积累特性研究[J].环境科学学报,26(12):2039-2044LiuJN,ZhouQX,SunT.2006.GrowingresponsesandhyperaccumulatingcharacteristicsofthreeornamentalplantstoCd-Pbcombinedpollution[J].ActaScientiaeCircumstantiae,26(12):2039-2044[免审稿件]责任编辑提示:本刊欢迎广大读者针对免审稿件提出各种意见Cd-Pb复合污染条件下3种花卉植物的生长反应及超积累特性研究刘家女1,2,周启星2,3,*,孙挺11.东北大学理学院,沈阳1100042.中国科学院沈阳应用生态研究所,中国科学院陆地生态过程重点实验室,沈阳1100163.南开大学环境科学与工程学院,天津300071收稿日期:2006-04-03录用日期:2006-11-02摘要:采用水培实验方法,研究了3种耐性较强的花卉植物在Cd-Pb复合污染条件下的生长反应及可能的超积累特性.结果表明,花卉植物种不同,其对复合污染的生长反应也不同,它们的耐性大小顺序为:蜀葵(AlthaearoseaCav.)>凤仙花(ImpatiensBalsaminaL.)>金盏菊(CalendulaofficinalisL.);Cd对植物生长的影响较大、Pb的影响相对较小.3种花卉植物对重金属的积累量都是根部大于地上部;蜀葵对重金属Cd具有很强的耐性和积累性,在Cd、Pb复合污染条件下极具植物修复的潜力.对于这3种花卉植物,Cd-Pb相互作用效应与多种因素有关,包括重金属之间的浓度组合、植物种和植株部位等,表现得极为复杂,不仅仅是单纯的加和、拮抗或协同作用.关键词:Cd-Pb复合污染;花卉植物;重金属;超积累文章编号:0253-2468(2006)12-2039-06中图分类号:X173文献标识码:AGrowingresponsesandhyperaccumulatingcharacteristicsofthreeornamentalplantstoCd-PbcombinedpollutionLIUJian1,2,ZHOUQixing2,3,*,SUNTing11.CollegeofSciences,NortheasternUniversity,Shenyang1100042.KeyLaboratoryofTerrestrialEcologicalProcess,InstituteofAppliedEcology,ChineseAcademyofSciences,Shenyang1100163.CollegeofEnvironmentalScienceandEngineering,NankaiUniversity,Tianjin300071Received3April2006;accepted2November2006Abstract:Usingthemethodofaquaticculture,thegrowingresponsesandaccumulatingcharacteristicsofthreeornamentalplantswithhightolerancetosingleCdorPbreportedinthepreviousstudywerefurtherinvestigated.Theresultsshowedthatthegrowingresponsesofvariousornamentalsweredifferentoneanother,dependingontheirspecies.ThesequenceoftolerancetotheCd-PbcombinedpollutionwasAlthaearoseaCav.>ImpatiensBalsaminaL.>CalendulaofficinalisL.,andCdhadmoreeffectsonthegrowthofornamentals,andPbhadless.Theheavymetalaccumulationintherootswashigherthanthatintheshootsofthethreeornamentals.AlthaearoseaCav.hadhighertolerancetoCdandcouldhighlyaccumulateit,thushavingagreatapplicationpotentialtophytoremediationofsoilenvironmentbyCd-Pbcombinedpollution.Forthethreeornamentals,theinteractiveeffectofCdandPbwascomplicated,notsimplyadditive,antagonisticandsynergistic,butalsorelatedwithmanyfactorsincludingvariousconcentrationcombinationsofheavymetals,plantspeciesanddifferenttissues.Keywords:Cd-Pbcombinedpollution;ornamentalplant;heavymeta;lhyperaccumulation1引言(Introduction)重金属Cd、Pb是环境中重要的污染物,而且在自然界中常常伴随存在,构成复合污染(周启星,1995;Weltje,1998;周启星,2003).目前,关于Cd-Pb复合污染对作物的毒害、生理特性影响以及生态效