纳米二氧化硅对两性生殖和孤雌生殖卤虫无节幼体毒性影响的比较研究  

Comparative Study on the Toxicity of Nano-SiO_2 on Nauplii of Amphigenetic Artemia francisana and Parthenogenetic Artemia parthenogenetica

作　　者：刘源[1,2] 陈法军[1] 周可新[2] Liu Yuan Chen Fajun Zhou Kexin(College of Plant Protection, Nanjing Agriculture University, Nanjing 210095, China Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China)

机构地区：[1]南京农业大学植物保护学院,南京210095 [2]环境保护部南京环境科学研究所,南京210042

出　　处：《生态毒理学报》2016年第5期86-93,共8页Asian Journal of Ecotoxicology

基　　金：环保公益性行业科研专项资助(201309049)

摘　　要：研究了纳米二氧化硅(Nano-SiO_2)悬浮液对美国大盐湖两性生殖型卤虫(Artemia francisana,GSL)和渤海湾孤雌生殖型卤虫(Artemia parthenogenetica,BH)无节幼体的急性毒性和抗氧化酶系统的影响。研究结果表明,Nano-SiO_2对GSL和BH无节幼体24 h-LC50分别为23.02 mg·m L^(-1)和20.96 mg·m L^(-1),属低级毒性。Nano-SiO_2降低了GSL和BH无节幼体还原型谷胱甘肽(GSH)含量,抑制了过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性,致丙二醛(MDA)含量升高,表明氧化应激反应是导致Nano-SiO_2对卤虫无节幼体致死的作用机制之一。This paper investigated the acute toxicity of Nano-SiO2 suspension to the Great Salt Lake bisexual Artemia（ Artemia francisana,GSL） nauplii and the Bohai Bay parthenogenetic Artemia（ Artemia parthenogenetica,BH） nauplii as well as the effects on their antioxidant systems. The results showed that 24 h-LC50 of Nano-SiO2 to GSL and BH nauplii were 23. 02 mg·m L^-1and 20. 96 mg·m L^-1respectively. Nano-SiO2 reduced glutathione（ GSH）contents in GSL and BH nauplii,inhibited their catalase（ CAT） and superoxide dismutase（ SOD） activities,increased malondialdehyde（ MDA） contents,suggesting that oxidative stress was one of the lethal mechanisms of Nano-SiO2 on Artemia nauplii.

关 键 词：纳米二氧化硅 两性生殖卤虫 孤雌生殖卤虫 急性毒性 氧化损伤 

分 类 号：X171.5[环境科学与工程—环境科学]