An environmentally relevant concentration of titanium dioxide (TiO2) nanoparticles induces morphological changes in the mouthparts of Chironomus tentans
| Autor: | Djuradj Milošević, Janja Vidmar, Dimitrija Savić-Zdravković, Boris Jovanović, Aca Đurđević, Milica Stojković-Piperac, Ana Savić |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Morphometrics Environmental Engineering biology Chemistry 010604 marine biology & hydrobiology Health Toxicology and Mutagenesis technology industry and agriculture Public Health Environmental and Occupational Health Sediment General Medicine General Chemistry 010501 environmental sciences biology.organism_classification 01 natural sciences Pollution Mentum Substrate (marine biology) Arthropod mouthparts Environmental chemistry Midge Environmental Chemistry Chronic toxicity Bioindicator 0105 earth and related environmental sciences |
| Zdroj: | Chemosphere |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2018.07.139 |
| Popis: | The present study was carried out in order to assess the influence of environmentally relevant concentrations of TiO 2 nanoparticles (E171 human food grade) toxicity on the freshwater midge Chironomus tentans. Tested concentrations were 125, 250, 500, 1000, 2000 and 4000 mg of E171 TiO 2 per 1 kg of sediment, for the experiment aiming at life trait toxicity observation; and 2.5, 25 and 250 mg of E171 TiO 2 per 1 kg of sediment for the experiment aiming at mouthpart deformity observation. The experimental design was constructed for the sediment dwelling chironomid larvae according to OECD guidelines. For the first time, a geometric morphometric approach was used to assess the deformities in chironomid larvae as sublethal implications of nanoparticle exposure. The present study showed a concentration–response relationship between the TiO 2 concentration in the substrate and the TiO 2 intake. The mortality and emergence ratio was affected at concentrations >1000 mg/kg. Geometric Morphometrics revealed the tendency of the mentum teeth to narrow and elongate and the mandibles to widen, as well as the loss of the first inner tooth, with a TiO 2 concentration rise. The variability of morphological changes observed in the mouthparts indicates that C. tentans could be used as a bioindicator in nano-TiO 2 monitoring. |
| Databáze: | OpenAIRE |
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