吕振娥;苏玉红;乔敏;

• 1:新疆大学化学化工学院
• 2:中国科学院生态环境研究中心

摘要(Abstract)：

全氟辛烷磺酸(PFOS)作为一种新型持久性有机污染物,目前国内外对其生态毒性研究主要集中在水环境领域,而高等植物的生态毒性数据尚不完善。因此,本研究采用内培养方式,选取小麦、大麦、小白菜、三叶草、绿豆作为供试植物,利用根伸长、芽伸长、地上部分生物量等评价指标,研究了PFOS短期暴露对不同供试作物苗期生长的影响,建立了PFOS和作物苗期生长的剂量-效应关系,并对不同的评价指标进行相关性分析,筛选出表征PFOS生态毒性的敏感植物。结果表明,不同供试作物培育3d后,PFOS对其于不同毒性终点的最小EC50值为:小麦352 mg·kg-1(根伸长)、大麦434 mg·kg-1(根伸长)、三叶草794 mg·kg-1(地上部分生物量鲜重)、小白菜829 mg·kg-1(地上部分生物量鲜重)、绿豆>1 000 mg·kg-1,因此敏感程度依次为:小麦>大麦>三叶草>小白菜>绿豆。须根系作物小麦、大麦较直根系作物三叶草、小白菜和绿豆敏感,而须根系作物各评价指标的敏感程度依次为:根伸长>地上部分生物量鲜重>芽伸长>地上部分生物量干重,可见小麦的根伸长对PFOS污染最为敏感。各评价指标间均呈正相关关系,表明PFOS对同种植物的不同评价指标影响趋势一致。

关键词(KeyWords)： 全氟辛烷磺酸(PFOS);根伸长;植物毒性;土壤

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展计划(863)项目(2012AA06A302)

作者(Author): 吕振娥;苏玉红;乔敏;

Email:

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