不同菊科植物耐铅性和富集特征比较研究  

A comparative study of Pb tolerance and enrichment characteristics of different species of compositae

作　　者：宣斌 王济[1] 蔡雄飞[1] 胡丰青[1] 段志斌[1] XUAN Bin;WANG Ji;CAI Xiong-fei;Hu Feng-qing;DUAN Zhi-bin(School of Geographic and Environmental Science, Guizhou Normal University, Guiyang 550025, Chin)

机构地区：[1]贵州师范大学地理与环境科学学院,贵阳550025

出　　处：《上海农业学报》2018年第3期16-20,共5页Acta Agriculturae Shanghai

基　　金：贵州省科技支撑计划项目[黔科合支撑(2017)2580];贵州省科学技术基金重点项目[黔科合JZ字(2014)2012号]

摘　　要：采用盆栽实验方法,研究了6种菊科植物(三脉紫菀、黑心菊、硫华菊、血皮菜、金盏菊、三叶鬼针草)在不同浓度胁迫下的耐铅性和富集特征。结果表明:随着Pb含量的增加,6种植物地上部干重呈现不断下降的趋势;硫华菊、血皮菜和金盏菊在所有浓度处理下,耐性指数(TI)均大于0.5且根系耐性指数(RTI)均大于0.9,对Pb胁迫具有较好的耐性;黑心菊地上部Pb含量最大为1 783 mg∕kg,且富集和转运系数均大于1;最后综合富集系数、转运系数和修复潜力指数,黑心菊可作为低浓度Pb污染土壤的修复植物。A pot experiment was conducted to study the Pb-resistance and enrichment characteristics of sixspecies of Compositae plants（Aster ageratoides,Rudbeckia hirta,Cosmos sulphureus,Gynura bicolor,Calendula officinalisandBidens pilosa） in different lead concentrations. The result showed that the dry weight of the sixspecies all decreased with the increase of Pb concentration. The three of them,Cosmos sulphureus,Gynura bicolor andCalendula officinalis,showed good resistance to Pb stress under all concentrations,with tolerance index（TI）greater than 0. 5 and the root tolerance index greater than 0. 9. Among the six,Rudbeckia hirtashowed the bestresistance to Pb stress,with Pb content in shoot amounting to the maximum 1 783 mg∕kg,and the enrichment andtransport coefficients all greater than 1. Based on the integrated observation of the enrichment coefficient,transport factor,the paper believes thatRudbeckia hirtacan be used to remediate Pb contaminated soil at lowconcentrations.

关 键 词：重金属 菊科 耐铅性 富集特征 

分 类 号：S502.4[农业科学—作物学]