海州香薷和紫花香薷对Cu、Zn的吸收和积累  

Uptake and Accumulation of Cu and Zn in Elsholtzia splendens and Elsholtzia argyi

作　　者：姜理英[1] 杨肖娥[1] 叶正钱[1] 石伟勇[1] 

机构地区：[1]浙江大学环境与资源学院资源科学系,浙江杭州310029

出　　处：《农业环境科学学报》2003年第5期524-528,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金(29977017)

摘　　要：采用水培试验方法,研究了Cu、Zn处理对海州香薷和紫花香薷(两种分别在铜矿和铅锌矿上良好生长的优势植物)生长及Cu、Zn吸收和积累的影响。结果表明,50μmol·L-1的Cu有利于海州香薷根系的生长,但却明显抑制紫花香薷地上部分的干物质产量,而Zn处理浓度直到200μmol·L-1也未对两种香薷的干物质量产生影响。低Cu(对照)时Zn的增加并未影响海州香薷地上部分Cu的含量和积累量,但高Cu(50和200μmol·L-1)时,Zn浓度的增加减少了海州香薷地上部分Cu的含量和积累量;而紫花香薷地上部分Cu含量和积累量无论是高Cu还是低Cu时都随Zn的增加而减少。同样,海州香薷和紫花香薷地上部分的Zn含量和积累量在低Zn时并未受Cu浓度的抑制,但在高Zn时,Cu的增加却减少了Zn含量的增加。而且海州香薷在高Cu(200μmol·L-1)和高Zn(200μmol·L-1)时对Cu和Zn的积累量明显高于紫花香薷,在Cu和Zn的修复上表现出优势。Elsholtzia splendens and Elsholtzia argyi both are dominant plants grow ing in Cu and Pb -Zn mining areas,resp ectively.Uptake and accumulation of Cu and Zn b y these two species were examined in a culture experiment.The results showed that dry weight of E.splendens was increased by 50mol·L -1 Cu,but depressed significant in E.a rgyi in comparison with that in the control(CK).It has been discovered that growth o f two species was not affected by 200mol·L -1 Zn supply.Cu content and accumulation in E.splendens shoots were not depre ssed by increasing Zn at low Cu concen tration(CK),but it was inverse at high Cu concent ration(50and 200mol·L -1 );Cu content and accumulation in E.argyi shoots decreased with increasin g Zn regardless of Cu supply.Although Zn contents and accumulati on in both two Elsholtzia species were not depressed by Cu increasing at lo w solution of Zn,they increased at high solution Zn.Moreover,Cu and Zn contents and accumulation in E.splendens were much higher t han E.argyi at high Zn(200mol·L -1 )and high Cu(200mol·L -1 ),which implied that E.splendens may have more advantage than E.argyi in r e-mediation Cu or Zn polluted environm ent.The difference between these tw o specie was related to their growth e nvironment and evolutional mechanism.

关 键 词：海州香薷 紫花香薷 CU ZN 吸收积累 干物质量 重金属污染 

分 类 号：X503.233[环境科学与工程—环境工程]