孔潇潇;王铁宇;张晓军;蒋曌泽;周云桥;李奇锋;孟晶;朱朝云;

• 1:牡丹江师范学院生命科学与技术学院
• 2:中国科学院生态环境研究中心城市与区域生态国家重点实验室
• 3:中国科学院大学

摘要(Abstract)：

为探究全氟化合物对水生植物的生态效应,选择金鱼藻(Ceratophyllum demersum L.)为受试生物,设定5、100、1 000、10 000、50 000、100 000μg·L-1以及对照共7个PFOS浓度梯度进行水培,分析包括超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)在内的抗氧化系统酶和细胞色素含量等生理响应特征,并研究金鱼藻对PFOS的生物有效性及富集能力。结果表明:金鱼藻对PFOS的富集量最高可达3 180 mg·kg-1dw,最大富集系数高达40.7倍,可作为PFOS污染水体植物修复的遴选物种。随PFOS浓度升高,SOD活力总体上没有明显变化,但POD活力表现为双重效用,即低浓度促进酶活力积累,而高浓度抑制酶活力积累。CAT活力在低浓度组(0、5、100、1 000μg·L-1),未表现出明显异常,在高浓度组(10 000、50 000、100 000μg·L-1),出现先升高后降低的趋势。色素含量也反应较为敏感,低浓度处理后色素含量升高,高浓度处理则导致色素含量先升高后降低,最高浓度处理下一直处于较低水平,可作为评价PFOS污染水体的生理敏感性指标。

关键词(KeyWords)： 全氟化合物;金鱼藻;PFOS生物有效性;抗氧化系统;生态效应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41171394);; 科技基础性工作专项(2013FY11110);; 中国科学院重点部署项目(KZZD-EW-TZ-12)

作者(Author): 孔潇潇;王铁宇;张晓军;蒋曌泽;周云桥;李奇锋;孟晶;朱朝云;

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