Low uptakes of Cd, Cu, and Zn in Dugesia japonica, a freshwater planarian with higher tolerance to metals
| Autor: | Jui-Pin Wu, Mei-Hui Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Pollutant Freshwater planarian Ecology biology 010501 environmental sciences biology.organism_classification 01 natural sciences Japonica Toxicology Metal 03 medical and health sciences 030104 developmental biology Bioaccumulation visual_art Environmental chemistry Toxicity visual_art.visual_art_medium General Earth and Planetary Sciences Dugesia japonica Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences General Environmental Science Invertebrate |
| Zdroj: | Chemistry and Ecology. 33:257-269 |
| ISSN: | 1029-0370 0275-7540 |
| DOI: | 10.1080/02757540.2017.1289187 |
| Popis: | Although a freshwater planarian is proposed as a potential model for studying toxicities of environmental pollutants, they are less sensitive to metal exposures, compared to other freshwater invertebrates. We hypothesised that the metal uptake is low in treated planarians, which may lead to their higher tolerance to metals. The acute toxicities of Cu and Zn to Dugesia japonica were determined. The 24- and 48-h median lethal concentrations were 4.50 and 3.46 mg L−1, respectively, for Cu, and 41.97 and 37.79 mg L−1, respectively, for Zn. Accordingly, combining with the data on Cd in our previous study, higher tolerance of planarians to metals was revealed. Also, tissue levels of Cd, Cu, and Zn in treated D. japonica were determined, and their dissolved uptake rate constants (k1) were calculated. Results showed that bioaccumulations of these metals in D. japonica were, indeed, lower than that in other freshwater invertebrates having higher susceptibilities to these metals. |
| Databáze: | OpenAIRE |
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