Toxic effects of nano-ZnO on marine microalgae Skeletonema costatum: Attention to the accumulation of intracellular Zn

被引：76

作者：

Zhang, Cai ^{[1
]}

Wang, Jiangtao ^{[1
]}

Tan, Liju ^{[1
]}

Chen, Xiaohua ^{[1
]}

机构：

[1] Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China

来源：

AQUATIC TOXICOLOGY | 2016年 / 178卷

关键词：

Nano-ZnO; Toxicity test; Intracellular total Zn; Skeletonema costatum; CERIUM OXIDE NANOPARTICLES; FRESH-WATER ALGAE; TITANIUM-DIOXIDE; ZINC-OXIDE; PSEUDOKIRCHNERIELLA-SUBCAPITATA; NANOMATERIALS; DISSOLUTION; PHYTOPLANKTON; ENVIRONMENT; NANO-TIO2;

D O I：

10.1016/j.aquatox.2016.07.020

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

To explore toxic mechanisms of nano-ZnO on marine microalgae, algal growth inhibition test was carried out, and total Zn in the cell and total dissolved Zn in f/2 medium were determined. It was found that nanoZnO was more toxic than bulk-ZnO on marine microalgae Skeletonema costatum. No matter under nanoZnO or bulk-ZnO treatment, accumulation of intracellular Zn had a good linear correlation with growth inhibition ratio (IR). The total Zn content in the cell of microalgae was the dominant toxic mechanism of ZnO. Intracellular total Zn could be an indispensable parameter to indicate the toxic effects of nanoZnO. Higher intracellular total Zn under nano-ZnO treatment than bulk-ZnO resulted in more toxicity of nano-ZnO on microalgae. Compared with Zn2+ released by nano-ZnO into medium, lipid peroxidation (MDA level) injury, aggregation of nano-ZnO and transmembrane process of nano-ZnO also contributed to toxicity of nano-ZnO on Skeletonema costatum. The accumulation of intracellular Zn provides a new insight into toxic mechanisms of nano-ZnO. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：158 / 164

页数：7

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