镉对金银花的毒物刺激效应  

Hormesis effect of cadmium on Lonicera japonica

作　　者：贾莲[1,2] 刘周莉[1] 陈玮[1] 何兴元[1] 齐丹[3] 

机构地区：[1]中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室,沈阳110164 [2]中国科学院大学,北京100049 [3]沈阳市农业检测中心,沈阳110034

出　　处：《应用生态学报》2013年第4期935-940,共6页Chinese Journal of Applied Ecology

基　　金："十二五"国家科技支撑计划项目(2012BAC05B05);国家水体污染控制与治理科技重大专项(2012ZX07202008)资助

摘　　要：采用水培方法,研究不同浓度镉(Cd)(0、0.5、2.5、5、10和25mg·L-1)胁迫下金银花的生长特征,分析低浓度Cd对金银花产生的毒物刺激效应.结果表明:低浓度Cd处理(≤5mg·L-1)对金银花最大根长、植株干质量以及叶绿素a、叶绿素b和类胡萝卜素含量均产生显著刺激效应,分别比对照增加13.6%、11.7%、14.0%、10.8%和54.5%;低浓度Cd(≤5mg·L-1)对叶片含水量表现出一定程度的促进作用,但影响不显著;当Cd浓度≥10mg·L-1,对金银花的生长表现出显著的抑制作用.当Cd浓度为25mg·L-1时,金银花地上部Cd含量达到622.93mg·kg-1,表明金银花对Cd具有较强的超富集能力.Cd对金银花产生毒物刺激效应的剂量范围为0.5～5mg·L-1.A hydroponic experiment was conducted to study the growth characteristics of Lonicera japonica under the stress of different concentrations （0, 0.5, 2.5, 5, 10, and 25 mg·L^-1） cad- mium （ Cd）, aimed to explore the hormesis effect of low concentrations Cd on L. japonica. At ≤5 mg·L^-1 of Cd, the maximum root length, plant dry biomass, and the contents of chlorophyll a, chlorophyll b, and carotenoid of L. japonica increased significantly, with the increment being 13.6%, 11.7%, 14.0% ,10.8%, and 54.5%, respectively, as compared mg·L^-1 of Cd also had a definite positive effect on the leaf water content. At the growth of L. japonica was inhibited significantly. When Cd concentration of L. japonica reached 622.93 mg · kg-1 , capacity of Cd-hyperaccumulation. The dose range of the h 0.5-5 mg·L^-1 of Cd. exposed to 25 mg with the control. ≤〈5 ≥10mg·L^-1 of Cd, mg·L^-1 of Cd, the shoot suggesting that L. japonica had a strong ormesis effect of Cd on L. japonica was

关 键 词：金银花 镉 毒物刺激效应 超富集 

分 类 号：S567.79[农业科学—中草药栽培]