摘要
采用土壤盆栽试验法,以桂花幼苗为对象,选择重金属Pb在质量比分别为0,50,100,500,1000和2000mg/kg条件下,Cd在质量比分别为0,1,10,50,100和200mg/kg条件下,研究了不同浓度Pb、Cd单一及复合胁迫对桂花幼苗生长的影响。结果表明,在试验条件下,随Pb和Cd处理浓度增加,桂花幼苗叶绿素含量呈下降趋势,POD活性先升后降,MDA含量呈上升趋势。Pb、Cd复合胁迫的毒性效应高于单一胁迫的毒性效应。
Physiological and biochemical reactions of Osmanthus fragrans （Thunb.） Lour to Pb, Cd exposure, both separately and combined , were studied comprehensively in this paper. The results reveal that with exposure to the rising level of Pb,Cd, either separately or together, chlorophyll appeared to decline significantly , while peroxidase （POD） activities rose initially, then dropped later, malondialdehyde（MDA） exhibited increased level. The tests also show the combined Pb and Cd exposure exhibited severe toxicity than either Cd or Pb stress seperatelv.
出处
《三峡环境与生态》
2013年第1期3-7,共5页
Environment and Ecology in the Three Gorges
基金
国家水污染控制与治理科技重大专项(2009ZX07104-003-03
2012ZX07104-002-04)
湖北省高等学校优秀中青年科技创新团队(No:T200703)
关键词
PB
CD
桂花
生理生化特性
Pb
Cd
Osmanthus fragrans （ Thunb. ） Lour ~ physiological and biochemical characteristics
