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Salinity mediates the toxic effect of nano-TiO2 on the juvenile olive flounder Paralichthys olivaceus

文献类型: 外文期刊

作者: Huang, Xizhi 1 ; Lan, Yawen 1 ; Liu, Zekang 1 ; Huang, Wei 4 ; Guo, Qindan 1 ; Liu, Liping 1 ; Hu, Menghong 1 ; Sui, Yanm 1 ;

作者机构: 1.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai 201306, Peoples R China

2.Shanghai Ocean Univ, Minist Sci & Technol, Int Res Ctr Marine Biosci, Shanghai, Peoples R China

3.Shanghai Ocean Univ, Minist Educ, Key Lab Explorat & Utilizat Aquat Genet Resources, Shanghai 201306, Peoples R China

4.State Oceanic Adm, Inst Oceanog 2, Lab Marine Ecosyst & Biogeochem, Hangzhou 310058, Zhejiang, Peoples R China

5.State Oceanic Adm, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Zhejiang, Peoples R China

6.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Key Lab East China Sea Fishery Resources Exploita, Minist Agr, Shanghai 200090, Peoples R China

关键词: Nano-TiO2; Salinity; Paralichthys olivaceus; Oxidative stress; Histopathology

期刊名称:SCIENCE OF THE TOTAL ENVIRONMENT ( 影响因子:7.963; 五年影响因子:7.842 )

ISSN: 0048-9697

年卷期: 2018 年 640 卷

页码:

收录情况: SCI

摘要: Increased production of engineered nanoparticles has raised extensive concern about the potential toxic effects on marine organisms living in estuarine and coastal environments. Meanwhile, salinity is one of the key environmental factors that may influence the physiological activities in flatfish species inhabiting in those waters due to fluctuations caused by freshwater input or rainfall. In this study, we investigated the oxidative stress and histopathological alteration of the juvenile Paralichthys olivaceus exposed to nano-TiO2 (1 and 10 mg L-1) under salinities of 10 and 30 psu for 4 days. In the gills, Na+-K+-ATPase activity significantly deceased after 4 days 10 psu exposure without nano-TiO2 compared with 1 day of acclimating the salinity from the normal salinity (30 psu) to 10 psu. Under this coastal salinity, low concentration (1 mg L-1) of nano-TiO2 exerted significant impacts. In the liver, the activities of superoxide dismutase, catalase, the levels of lipid peroxide and malondialdehyde increased with nano-TiO2 exposed under 30 psu. Such increase indicated an oxidative stress response. The result of the integrated biomarker responses showed that P. olivaceus can be adversely affected by high salinity and high concentration of nano-TiO2 for a short-term (4 days) exposure. The histological analysis revealed the accompanying severe damages for the gill filaments. Principal component analysis further showed that the oxidative stress was associated with the nano-TiO2 effect at normal salinity. These findings indicated that nano-TiO2 and normal salinity exert synergistic effects on juvenile P. olivaceus, and low salinity plays a protective

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