综合根系活性及叶片光合速率揭示碳纳米材料对湿地中水生植物的影响  

Comprehensive Photosynthesis and Enzymes Analysis Reveal Impacts of Carbon Nanomaterials on Wetland-plant System

作　　者：杨祥宇 邓亚宏 石益广 袁小兵 孙志国 何强[1,2,3] 陈一 Yang Xiangyu;Deng Yahong;Shi Yiguang;Yuan Xiaobing;Sun Zhiguo;He Qiang;Chen Yi(Key Laboratory of the Three Gorges Region’s Eco-Environment,Ministry of Education,Chongqing University,Chongqing 400045,China;National Centre for International Research of Low-carbon and Green Buildings,Chongqing University,Chongqing 400045,China;College of Environment and Ecology,Chongqing University,Chongqing 400045,China;The Second Construction Engineering Co.Ltd.,China Construction Third Engineering Bureau Group Co.Ltd.,Wuhan 430000,China)

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆大学,重庆400045 [2]国家低碳和绿色建筑国际研究中心,重庆大学,重庆400045 [3]重庆大学环境与生态学院,重庆400045 [4]中建三局第二建设工程有限责任公司,武汉430000

出　　处：《生态毒理学报》2021年第6期181-190,共10页Asian Journal of Ecotoxicology

基　　金：国家自然科学基金面上项目(51708056);国家污染治理科技重大专项(2017ZX07401003-4);重庆市青年人才计划(CQY201905062)。

摘　　要：人工湿地通常被认为是去除纳米材料(nano-materials,NMs)的有效技术。然而,湿地植物在碳纳米材料(carbon nano-materials,CNMs)胁迫下的响应尚不清楚。本研究对常见CNMs包括单壁碳纳米管(SWCNTs)、多壁碳纳米管(MWCNTs)和纳米富勒烯(nC_(60))在低(10μg·L^(-1))和高(1000μg·L^(-1))浓度条件下暴露5 d和180 d的影响展开研究。植物体内抗氧化酶活性,如超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性出现显著变化且丙二醛(MDA)过量。此外,SWCNTs和MWCNTs均明显抑制了光合速率和根系活性,而nC_(60)的影响并不明显。植物生物量及主要元素(C、N、P)含量均有波动。Constructed wetlands(CWs)are considered as the efficient technology for the nano-materials(NMs)removal.However,the responses of wetland plants under carbon nano-materials(CNMs)stress have been unclear.Here,we investigated the differential impacts of common CNMs(SWCNTs,MWCNTs and nC_(60))on wetland plants under 5-day and 180-day exposure to low(10μg·L^(-1))and high(1000μg·L^(-1))concentrations.After two exposure phases,as the invading substance,CNMs induced the variation of antioxidant enzyme activities(e.g.,superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)activities)as well as the overproduction of malondialdehyde(MDA).Additionally,SWCNTs and MWCNTs obviously inhibited photosynthesis rate and root activity.Differently,nC_(60)had no obvious effects on photosynthesis rate and root activity under 180-day exposure.As responses the biomass and major elements(C,N and P)content of plants had a corresponding fluctuation towards CNMs stress.

关 键 词：碳纳米材料 植物活性 人工湿地 抗氧化酶活性 光合速率 生物量 

分 类 号：X171.5[环境科学与工程—环境科学]