Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particles
The toxic effects of different nanoparticles (NPs) have been reported to be quite different. The present study exposed Daphnia pulex to undissociated TiO2 NPs and SiO2 NPs, and dissociated ZnO NPs. The acute toxicity of the three oxide NPs and their influence on D. pulex molting, as well as the expr...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651321006035 |
| _version_ | 1819096115889307648 |
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| author | Wenwen Wang Yuanzhu Yang Lihua Yang Tiangang Luan Li Lin |
| author_facet | Wenwen Wang Yuanzhu Yang Lihua Yang Tiangang Luan Li Lin |
| author_sort | Wenwen Wang |
| collection | DOAJ |
| description | The toxic effects of different nanoparticles (NPs) have been reported to be quite different. The present study exposed Daphnia pulex to undissociated TiO2 NPs and SiO2 NPs, and dissociated ZnO NPs. The acute toxicity of the three oxide NPs and their influence on D. pulex molting, as well as the expressions of genes related to molting, energy metabolism and genetic material expression were compared. The results showed that the toxicities of TiO2 NPs and SiO2 NPs to D. pulex were weaker than ZnO NPs. During the exposure period, agglomerates of undissociated TiO2 NPs and SiO2 NPs influenced movements of D. pulex, and induced their molting after attaching to the body surface. Meanwhile, gene expressions of molting (eip) and energy metabolism (scot and idh) were up-regulated. Therefore, we inferred that the adhering to the surface of daphnids, promoting their molting and improving their energy metabolism may be parts of the toxicity mechanisms of undissociated NPs to D. pulex. On the contrary, dissociated ZnO NPs inhibited molting and gene expressions of eip, scot and idh, which showed a similar trend as bulk ZnO and ZnSO4·7H2O under the low-dose exposure condition. This indicates that the toxic effects of dissociated ZnO NPs were primarily caused by released Zn ions. The results provided direct evidence about the effect of nanoparticles on molting and revealed that the toxicity mechanisms of dissociated NPs were different from undissociated NPs. |
| first_indexed | 2024-12-21T23:54:04Z |
| format | Article |
| id | doaj.art-1390f4cf167e4f559c5ceb2ed1fd39e6 |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-12-21T23:54:04Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-1390f4cf167e4f559c5ceb2ed1fd39e62022-12-21T18:45:51ZengElsevierEcotoxicology and Environmental Safety0147-65132021-10-01222112491Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particlesWenwen Wang0Yuanzhu Yang1Lihua Yang2Tiangang Luan3Li Lin4School of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, PR ChinaSchool of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, PR ChinaSchool of Marine Sciences, Sun Yat-sen University, Guangzhou, PR ChinaSchool of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, PR ChinaSchool of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, PR China; Corresponding author.The toxic effects of different nanoparticles (NPs) have been reported to be quite different. The present study exposed Daphnia pulex to undissociated TiO2 NPs and SiO2 NPs, and dissociated ZnO NPs. The acute toxicity of the three oxide NPs and their influence on D. pulex molting, as well as the expressions of genes related to molting, energy metabolism and genetic material expression were compared. The results showed that the toxicities of TiO2 NPs and SiO2 NPs to D. pulex were weaker than ZnO NPs. During the exposure period, agglomerates of undissociated TiO2 NPs and SiO2 NPs influenced movements of D. pulex, and induced their molting after attaching to the body surface. Meanwhile, gene expressions of molting (eip) and energy metabolism (scot and idh) were up-regulated. Therefore, we inferred that the adhering to the surface of daphnids, promoting their molting and improving their energy metabolism may be parts of the toxicity mechanisms of undissociated NPs to D. pulex. On the contrary, dissociated ZnO NPs inhibited molting and gene expressions of eip, scot and idh, which showed a similar trend as bulk ZnO and ZnSO4·7H2O under the low-dose exposure condition. This indicates that the toxic effects of dissociated ZnO NPs were primarily caused by released Zn ions. The results provided direct evidence about the effect of nanoparticles on molting and revealed that the toxicity mechanisms of dissociated NPs were different from undissociated NPs.http://www.sciencedirect.com/science/article/pii/S0147651321006035ZnO NPsTiO2 NPsSiO2 NPsDaphnia pulexMoltingUndissociated |
| spellingShingle | Wenwen Wang Yuanzhu Yang Lihua Yang Tiangang Luan Li Lin Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particles Ecotoxicology and Environmental Safety ZnO NPs TiO2 NPs SiO2 NPs Daphnia pulex Molting Undissociated |
| title | Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particles |
| title_full | Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particles |
| title_fullStr | Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particles |
| title_full_unstemmed | Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particles |
| title_short | Effects of undissociated SiO2 and TiO2 nano-particles on molting of Daphnia pulex: Comparing with dissociated ZnO nano particles |
| title_sort | effects of undissociated sio2 and tio2 nano particles on molting of daphnia pulex comparing with dissociated zno nano particles |
| topic | ZnO NPs TiO2 NPs SiO2 NPs Daphnia pulex Molting Undissociated |
| url | http://www.sciencedirect.com/science/article/pii/S0147651321006035 |
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