农业环境科学学报2016，Vol.35Issue(8)：1458-1464,7.DOI:10.11654/jaes.2016-0119
垃圾渗滤液暴露对拟南芥的毒效应研究
Phytotoxicity of landfill leachate to Arabidopsis thaliana
摘要
Abstract
Landfill leachate can cause significant threats to the surrounding soil, surface water and groundwater. In the present research, the toxicity of landfill leachate to A rabidopsis thaliana was examined by detecting its growth and development during early, maturity and late stages. Our results showed that landfill leachate influenced the growth of Arabidopsis thaliana during the whole life cycle. Low concentra-tions of leachate(0.1%)and short time exposure(24 h)promoted the germination rates and root growth, which was 256%and 324%of the control, respectively; while high concentrations(10%)and long time exposure(≥48 h)showed inhibitory effects, with germination rates and root growth being 67%and 36%of control, respectively. However, shoot length showed a significant difference only under 48 h expo-sure, indicating that root length was more sensitive to leachate than shoot length. The landfill leachate also affected the growth of A rabidopsis thaliana during maturity stage, by inducing oxidative damages in concentration-effect and time-effect manners, and by further damaging the antioxidant defense system. In addition, high concentrations(20%)of leachate significantly inhibited the reproduction of Arabidopsis thaliana during late stage(P<0.01). The bolting rate and pod number decreased to 45%and 43%of control after 15-day leachate exposure, respectively. These results suggest that Arabidopsis thaliana is an efficient, simple and reproducible biomarker in monitoring the toxicity of landfill leachate.关键词
垃圾渗滤液/拟南芥/综合毒性/氧化损伤Key words
landfill leachate/Arabidopsis thaliana/comprehensive toxicity/oxidative damage分类
资源环境引用本文复制引用
李广科,陈俊艳,付小娟..垃圾渗滤液暴露对拟南芥的毒效应研究[J].农业环境科学学报,2016,35(8):1458-1464,7.基金项目
国家自然科学基金项目（21477070）；高等学校博士学科点专项科研基金项目 （）
