摘要
以小麦为供试生物,采用高等植物毒理诊断试验方法研究了土壤外源环丙沙星和铜复合污染对小麦早期生长的影响,以探讨粪源污染土壤潜在的生态风险。结果表明:在供试浓度范围内,铜和环丙沙星单一污染下,小麦种子早期生长指标均产生了不同程度的响应,其中芽长和根长主要表现为抑制效应,而小麦种子发芽率未受影响;指标对污染物反应敏感顺序为芽长>根长>发芽率、环丙沙星与铜复合污染对小麦根长和芽长的影响表现出不同的效应;20和80 mg·kg-1铜与环丙沙星复合时相对单一作用对小麦根长的抑制有毒性增强的趋势,表现为协同效应;而200 mg·kg-1单一铜处理对小麦芽长的抑制效应在与环丙沙星复合后有所缓解,表现为拮抗特征;环丙沙星和铜在环境介质中交互作用产生络合物可能是导致不同生物效应的原因。
The effect of soil exogenous ciprofloxacin and copper combined pollution on the early growth of wheat was studied by the toxicological diagnosis method of higher plant. The potential ecological risks of soil contamination derived from livestock manure were investigated. Results indicated the early growth indexes of wheat expressed different degrees of responses to single copper or ciprofloxacin exposure. The wheat shoot and root length were mainly inhibited, while the seed germination rate was unaffected. The sensitivities of the three indexes to the two pollutants were in order of shoot length 〉 root length 〉 germination rate. Ciprofloxacin and copper combined pollution showed different effects on the wheat roots and shoot length. Compared with single copper exposure, inhibition effect on wheat root length was enhanced by the combined treatment of 20 mg· kg-1 copper and 80 mg ·kg-1 ciprofloxacin, showing a synergistic effect, while the inhibi- tion effect on wheat shoot length by the addition of 200 mg· kg-1 of copper eased after ciprofloxacin addition, showing an antagonistic effect. The complex, produced by the interaction of ciprofloxacin and copper, may be the cause of various biological effects.
出处
《生态学杂志》
CAS
CSCD
北大核心
2014年第9期2376-2381,共6页
Chinese Journal of Ecology
基金
中国博士后科学基金项目(2011M500573)资助
关键词
环丙沙星
铜
复合污染
发芽率
根长
芽长
ciprofloxacin
copper
combined pollution
germination rate
root length
shoot length.
