摘要
通过实验室水培试验研究不同浓度处理水平下Cu、Cd、As单一及其复合污染对紫背浮萍叶绿素和丙二醛浓度的影响结果表明,同一浓度处理水平下,单一重金属污染对浮萍叶绿素的生态毒性效应为Cd>Cu>As,对丙二醛的生态毒性效应为Cd≈As>Cu。与单一污染相比,As+Cd和Cu+Cd复合污染对浮萍叶绿素毒性增强,表现为协同作用,加强了对浮萍叶细胞的伤害;而As+Cu和As+Cu+Cd复合污染对叶绿素联合毒性作用趋向于毒性减少的拮抗作用。复合污染对浮萍丙二醛的生态毒性效应情况则较复杂,除As+Cd外其余3种复合污染组合对浮萍细胞膜均有一定增透作用。
Through the experiment of water train in laboratory,the effect of Cu,Cd,As and their compound pollution on the chlorophyll and MDA（Methane Dicarboxylic Aldehyde） concentration in the duckweed were studied. The results show that at the same concentration level, the single-toxicity order of Cu, Cd, As to the chlorophyll of duckweed is CA 〉 Cu 〉 As,Cd≈As〉 Cu is the MDA＇s single-toxicity order. Compared with the single pollution, the eco-toxicity of compound pollution of As ＋ CA and Cu ＋ CA becomes stronger, which presents a synergistic effect, as far as the lethal concentration to the cell of duckweed＇s lamina is concerned;As ＋ Cu and As ＋ Cu ＋ CA is inclined to an antagonistic effect of which the eco-toxicity of compound pollution becomes weaker. The eco-toxicity of duckweed＇s MDA is relatively complex. Besides As ＋ Cd, the other compound pollution has an effective over-penetration on the cell membrane of duckweed.
出处
《中国生态农业学报》
CAS
CSCD
2006年第3期135-137,共3页
Chinese Journal of Eco-Agriculture
基金
中日合作丰田基金项目(ToyotaFundD01-B3-010)
湖南农业大学科技创新基金(040PT02)资助
关键词
重金属
浮萍
单一污染
复合污染
联合毒性效应
Heavy metal, Duckweed, Single pollution, Compound pollution, Combined toxicological effect
