Back to Search
Start Over
Effects of TiO2 nanoparticles on ROS production and growth inhibition using freshwater green algae pre-exposed to UV irradiation.
- Source :
-
Environmental toxicology and pharmacology [Environ Toxicol Pharmacol] 2015 May; Vol. 39 (3), pp. 1074-80. Date of Electronic Publication: 2015 Apr 01. - Publication Year :
- 2015
-
Abstract
- This study investigated the possibility that titanium dioxide nanoparticles (nano-TiO2) toxicity in Pseudokirchneriella subcapitata involves reactive oxygen species (ROS) production, using the dichlorodihydrofluorescein (DCF) assay. Algae were exposed to nano-TiO2 under laboratory fluorescent lamps supplemented with UV irradiation for 3h, with or without a UV filter. Results showed that nano-TiO2 increased ROS production in UV-exposed cells, with or without a UV filter (LOEC values were 250 and 10mg/L, respectively). Sublethal effects of nano-TiO2 on UV pre-exposed algae were also examined. Toxicity studies indicated that exposure to nano-TiO2 agglomerates decreased algal growth following 3h pre-exposure to UV, with or without a UV filter (EC50s were 8.7 and 6.3mg/L, respectively). The present study suggests that the growth inhibitory effects of nano-TiO2 in algae occurred at concentrations lower than those that can elevate DCF fluorescence, and that ROS generation is not directly involved with the sublethal effects of nano-TiO2 in algae.<br /> (Copyright © 2015 Elsevier B.V. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1872-7077
- Volume :
- 39
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Environmental toxicology and pharmacology
- Publication Type :
- Academic Journal
- Accession number :
- 25867689
- Full Text :
- https://doi.org/10.1016/j.etap.2015.03.015