铜污染对延胡索生长和铜积累的影响  

Effects of Copper Pollution on Growth and Cu^(2+) Accumulation of Rhizoma yanhusuo

作　　者：余顺慧[1] 刘双琳[1] 方荣美[1] 董凯馨 张静[1] 祁俊生[1] 

机构地区：[1]重庆三峡学院三峡库区水环境演变与污染防治重庆高校市级重点实验室,重庆万州404100

出　　处：《贵州农业科学》2016年第2期133-136,共4页Guizhou Agricultural Sciences

基　　金：重庆市应用开发计划项目"延胡索规范化生态种植与深加工关键技术研发"(cstc2014yykfA110024)

摘　　要：为阐明Cu2+污染对延胡索的毒害机理,采用土培法对延胡索进行不同Cu2+浓度的处理,探讨重金属对其生长、抗氧化酶活性和Cu2+积累的影响。结果表明:Cu2+污染下,延胡索生长受抑制,生物量下降;明显影响延胡索的抗氧化酶活性,即随着Cu2+处理浓度的增加,CAT、POD及SOD的酶活性变化呈先升后降趋势;明显影响延胡索叶绿素含量,除Cu2+浓度在150mg/kg时,叶绿素含量略有增加外,总体呈下降趋势;随着Cu2+处理浓度的增加,延胡索地下块茎对Cu2+的积累逐渐增多,在Cu2+浓度为250mg/kg时Cu2+含量增加速度最大。生产上应注意土壤中的Cu2+含量。R.yanhusuo plants were cultured in pots adding different Cu^2＋concentration to discuss effects of heavy metals on growth,antioxidant enzyme activity and Cu^2＋accumulation of R.yanhusuo under different Cu^2＋stress and expound the toxicant mechanism of Cu^2＋pollution to R.yanhusuo.Results：Cu^2＋pollution inhibits growth of R.yanhusuo.The CAT,POD and SOD activity of R.yanhusuo presents a first rising and then declining trend with increase of Cu^2＋concentration.The leaf chlorophyll content of R.yanhusuo shows a declining trend overall with increase of Cu^2＋concentration,except for 150mg/kg Cu^2＋concentration.Cu^2＋accumulation in R.yanhusuo underground tubers increases gradually with increase of Cu^2＋concentration and the increase speed of Cu^2＋content in R.yanhusuo underground tubers reaches the maximum when Cu2＋concentration is 250 mg/kg,which indicates that soil Cu^2＋content should be paid more attention to in production of R.yanhusuo.

关 键 词：铜污染 延胡索 生长 铜积累 

分 类 号：S19[农业科学—农业基础科学]