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https://hdl.handle.net/10316/109662
Title: | Does functionalised nanoplastics modulate the cellular and physiological responses of aquatic fungi to metals? | Authors: | Barros, Juliana Batista Kumar, Santosh Sahadevan, Seena |
Keywords: | Aquatic hyphomycetes; Copper; Freshwaters; Plastic pollution; Polystyrene | Issue Date: | 18-Sep-2023 | Publisher: | Elsevier | Project: | info:eu-repo/grantAgreement/FCT/03644 - 2022.03644.PTDC/Quantificação e impactos de nanoplásticos e a sua interação com metais em processos ecossistémicos em rios IT057-18-7254 info:eu-repo/grantAgreement/FCT/POR_CENTRO/2022.10696.BD/PT/Effects of nanoplastics in metal-polluted freshwaters: from ecosystem to cellular responses of leaf litter decomposers info:eu-repo/grantAgreement/UIDB/04292/2020/PT LA/P/0069/2020 |
Serial title, monograph or event: | Environmental Pollution | Volume: | 337 | Abstract: | Co-contamination of freshwaters by nanoplastics (NPs; ≤ 1 μm) and metals is an emerging concern. Aquatic hyphomycetes play a crucial role as primary decomposers in these ecosystems. However, concurrent impacts of NPs and metals on the cellular and physiological activities of these fungi remain poorly understood. Here, the effects of environmentally realistic concentrations of two types of polystyrene (PS) NPs (bare and -COOH; up to 25 μg L-1) and copper (Cu; up to 50 μg L-1) individually and all possible combinations (NPs types and Cu) on Articulospora tetracladia, a prevalent aquatic hyphomycete, were investigated. Endpoints measured were intracellular reactive oxygen species accumulation, plasma membrane disruption and fungal growth. The results suggest that functionalised (-COOH) NPs enhance Cu adsorption, as revealed by spectroscopic analyses. Notably, NPs, Cu and their co-exposure to A. tetracladia can lead to ROS accumulation and plasma membrane disruption. In most cases, exposure to treatments containing -COOH NPs with Cu showed greater cellular response and suppressed fungal growth. By contrast, exposure to Cu individually showed stimulatory effects on fungal growth. Overall, this study provides novel insight that functionalisation of NPs facilitates metal adsorption, thus modulating the impacts of metals on aquatic fungi. | URI: | https://hdl.handle.net/10316/109662 | ISSN: | 02697491 | DOI: | 10.1016/j.envpol.2023.122549 | Rights: | openAccess |
Appears in Collections: | I&D MARE - Artigos em Revistas Internacionais |
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1-s2.0-S0269749123015518-main.pdf | 10.4 MB | Adobe PDF | View/Open |
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