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Effect and mechanism of microplastics exposure against microalgae: Photosynthesis and oxidative stress
Li, J.; Zheng, X.W.; Liu, X.L.; Zhang, L.L.; Zhang, S.; Li, Y.Y.; Zhang, W.Z.; Li, Q.H.; Zhao, Y.Q.; Chen, X.F.; Wang, X.R.; Huang, H.H.; Fan, Z.Q. (2023). Effect and mechanism of microplastics exposure against microalgae: Photosynthesis and oxidative stress. Sci. Total Environ. 905: 167017. https://dx.doi.org/10.1016/j.scitotenv.2023.167017
In: Science of the Total Environment. Elsevier: Amsterdam. ISSN 0048-9697; e-ISSN 1879-1026, meer
|  |
| Author keywords |
Plastics; Endpoint; Molecular mechanisms; Exposure; Biological function |
| Auteurs | | Top |
- Li, J.
- Zheng, X.W.
- Liu, X.L.
- Zhang, L.L.
- Zhang, S.
|
- Li, Y.Y.
- Zhang, W.Z.
- Li, Q.H.
- Zhao, Y.Q.
|
- Chen, X.F.
- Wang, X.R.
- Huang, H.H.
- Fan, Z.Q.
|
| Abstract |
The occurrence of microplastics (MPs) within aquatic ecosystems attracts a major environmental concern. It was demonstrated MPs could cause various ecotoxicological effects on microalgae. However, existing data on the effects of MPs on microalgae showed great variability among studies. Here, we performed a meta-analysis of the latest studies on the effects of MPs on photosynthesis and oxidative stress in microalgae. A total of 835 biological endpoints were investigated from 55 studies extracted, and 37 % of them were significantly affected by MPs. In this study, the impact of MPs against microalgae was concentration-dependent and size-dependent, and microalgae were more susceptible to MPs stress in freshwater than marine. Additionally, we summarized the biological functions of microalgae that are primarily affected by MPs. Under MPs exposure, the content of chlorophyll a (Chl-a) was reduced and electron transfer in the photosynthetic system was hindered, causing electron accumulation and oxidative stress damage, which may also affect biological processes such as energy production, carbon fixation, lipid metabolism, and nucleic acid metabolism. Finally, our findings provide important insights into the effects of MPs stress on photosynthesis and oxidative stress in microalga and enhance the current understanding of the potential risk of MPs pollution on aquatic organisms. |
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