Impact of microplastics on the foraging, photosynthesis and digestive systems of submerged carnivorous macrophytes under low and high nutrient concentrations
Environmental Pollution, ISSN: 0269-7491, Vol: 292, Issue: Pt A, Page: 118220
2022
- 51Citations
- 99Captures
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Metrics Details
- Citations51
- Citation Indexes51
- 51
- CrossRef32
- Captures99
- Readers99
- 99
Article Description
The prevalence of microplastics in marine, terrestrial, and freshwater habitats has raised concerns about their availability and risks to organisms. However, the effects of plastic debris on aquatic plants remain largely unknown and have hardly been studied, despite the importance of these plants in freshwater ecosystems. In this study, we exposed the aquatic carnivorous plant Utricularia vulgaris to polystyrene microplastics (10 and 80 mg/L) combined with different nutrient concentrations and then assessed their effects on the growth rate, photosynthesis, oxidative stress, and trap-associated microbial community of U. vulgaris. The impact of microplastic accumulation in the traps (or “bladders”) of U. vulgaris was investigated using confocal microscopy. The results showed that the relative growth rate, shoot length, chlorophyll content, Fv/Fm, and ascorbate peroxidase enzyme activity of U. vulgaris decreased in 80 mg/L microplastics, whereas the superoxide dismutase and peroxidase enzyme activities increased significantly. The presence of microplastics led to higher malondialdehyde and hydrogen peroxide contents. However, high nutrient concentrations can compensate for the reduced growth performance of U. vulgaris in microplastic-exposure treatments. The microplastic treatments significantly altered the trap-associated microbial community structure and diversity. The results of this study revealed that beside adsorption, carnivorous plants can accumulate microplastics in their digestive organs.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0269749121018029; http://dx.doi.org/10.1016/j.envpol.2021.118220; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85116647009&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/34606972; https://linkinghub.elsevier.com/retrieve/pii/S0269749121018029; https://dx.doi.org/10.1016/j.envpol.2021.118220
Elsevier BV
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