The role of algal EPS in reducing the combined toxicity of BPA and polystyrene nanoparticles to the freshwater algae Scenedesmus obliquus

Giri, Sayani; Christudoss, Abisha Christy; Chandrasekaran, N.; Peijnenburg, Willie J.G.M.; Mukherjee, Amitava

doi:10.1016/j.plaphy.2023.107664

Cited by 18 publications

(6 citation statements)

References 51 publications

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“…The pigmentation systems are considered to be possible defence mechanisms against multiple abiotic stressors. 19 In the current study, both DCF and FNPs individually caused a dose-dependent decline in the CHL A and B and CAR contents in a dose-dependent manner. Previous findings demonstrated that NSAID exposure had an impact on the photosynthetic pigment level, and cellular ultrastructure investigations of S. obliquus indicated the altered chlorophyll structure and destroyed thylakoids.…”

Section: Discussionsupporting

confidence: 50%

“…16 Also, an earlier study found that SOD and CAT activity in S. obliquus considerably increased when exposed to NPs, supporting the results which supported the data that the SOD and CAT production increased when it interacted with pristine FNPs. 19 When observing the combined effects, both SOD and CAT increased extensively in higher-concentration combinations in a dosedependent way. This is in line with the increased SOD and CAT levels when co-exposed with PS particles and roxithromycin at higher doses in Daphnia magna.…”

Section: Discussionmentioning

confidence: 99%

“…Then, the water was autoclaved at 121 °C for 15 min. 19 The sterilized environmental water (devoid of other contaminants) will hereafter be referred to as ‘lake water medium’. This lake water medium was used for interactions to mimic the aquatic environment which supports algal cell growth without altering the physicochemical composition of the water as explained in our previous report.…”

Section: Methodsmentioning

confidence: 99%

“…The detailed procedure for the assessment of cell viability 19 of the algal cells interacting with both the pristine form and combinations of DCF and FNPs is explained in the ESI † (Methods section). cell membrane composed of a lipid bilayer, was used to evaluate the total ROS generation.…”

Section: Cell Viability Assessmentmentioning

confidence: 99%

“…As a scavenging mechanism, antioxidant enzymes can be generated inside cells during oxidative stress. The methods to assess the antioxidant enzymes (superoxide dismutase 27 and catalase 19 ) are mentioned in the ESI † (Methods section).…”

Section: Antioxidant Enzyme Assessmentmentioning

confidence: 99%

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Polystyrene nanoplastics alter the ecotoxicological effects of diclofenac on freshwater microalgae Scenedesmus obliquus

Christudoss,

Chandrasekaran,

Mukherjee

2024

Environ. Sci.: Processes Impacts

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Section: Discussionsupporting

confidence: 50%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Cell Viability Assessmentmentioning

confidence: 99%

Section: Antioxidant Enzyme Assessmentmentioning

confidence: 99%

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Polystyrene nanoplastics alter the ecotoxicological effects of diclofenac on freshwater microalgae Scenedesmus obliquus

Christudoss,

Chandrasekaran,

Mukherjee

2024

Environ. Sci.: Processes Impacts

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The comparative effects of visible light and UV-A radiation on the combined toxicity of P25 TiO2 nanoparticles and polystyrene microplastics on Chlorella sp.

Rex M,

Mukherjee

2023

Environ Sci Pollut Res

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The ubiquitous presence of TiO 2 nanoparticles (nTiO 2 ) and microplastics (MPs) in marine ecosystems has raised serious concerns about their combined impact on marine biota. In the natural environment, marine microalgae can interact with mixtures of nTiO 2 and MPs under both visible light and UV-A radiation conditions. However, most of the previous toxicity studies employed visible light conditions, so the in uence of UV-A radiation on toxicity remains poorly understood. To address this gap, the current study aimed to compare the effects of visible light and UV-A radiation on the combined toxic effects of nTiO 2 and polystyrene microplastics (PSMPs) in the marine microalga Chlorella sp using arti cial seawater directly as the test medium. Our results demonstrated that under UV-A radiation the algal growth inhibition was signi cantly enhanced compared to that in visible light conditions. The mixtures of nTiO 2 and PSMPs exhibited signi cant enhanced toxicity than their pristine forms. Speci cally, the mixtures of nTiO 2 and NH 2 -functionalized PSMPs (10mg/L) showed higher toxicity to algae than the mixtures with COOH-functionalized PSMPs (10mg/L). Furthermore, UV-A radiation exacerbated the hetero aggregation between algae and pollutants. The photoactive nTiO 2 , promoted increased production of reactive oxygen species under UV-A exposure resulting in cellular damage, lipid peroxidation, and impaired photosynthesis. The effects were more pronounced in case of the mixtures where PSMPs added to the oxidative stress. The toxic effects of the binary mixtures of nTiO 2 and PSMPs were further con rmed through the Field Emission Electron Microscopy, revealing speci c morphological abnormalities. This study provides valuable insights into the potential risks associated with the combination of nTiO 2 and MPs in marine environments, considering the in uence of environmentally relevant light conditions and the test medium.

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Algal EPS modifies the toxicity potential of the mixture of polystyrene nanoplastics (PSNPs) and triphenyl phosphate in freshwater microalgae Chlorella sp.

Debroy,

Saravanan,

Nirmala

et al. 2024

Chemosphere

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The role of algal EPS in reducing the combined toxicity of BPA and polystyrene nanoparticles to the freshwater algae Scenedesmus obliquus

Cited by 18 publications

References 51 publications

Polystyrene nanoplastics alter the ecotoxicological effects of diclofenac on freshwater microalgae Scenedesmus obliquus

Polystyrene nanoplastics alter the ecotoxicological effects of diclofenac on freshwater microalgae Scenedesmus obliquus

The comparative effects of visible light and UV-A radiation on the combined toxicity of P25 TiO2 nanoparticles and polystyrene microplastics on Chlorella sp.

Algal EPS modifies the toxicity potential of the mixture of polystyrene nanoplastics (PSNPs) and triphenyl phosphate in freshwater microalgae Chlorella sp.

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