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| Main Authors: | , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Marine environmental research
2026
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/41242166/ |
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| _version_ | 1868266127702884353 |
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| author | Bilida, Anna Grammatikopoulos, George Dailianis, Stefanos |
| author_facet | Bilida, Anna Grammatikopoulos, George Dailianis, Stefanos Bilida, Anna Grammatikopoulos, George Dailianis, Stefanos |
| collection | PubMed - marine biology |
| contents | Algal growth and photosynthetic responses of Dunaliella tertiolecta and Scenedesmus rubescens to methyl- and propylparaben mixtures. Bilida, Anna Grammatikopoulos, George Dailianis, Stefanos Photosynthesis Scenedesmus Water Pollutants, Chemical Parabens Chlorophyll Chlorophyceae Microalgae This study investigates the effects of environmentally relevant concentrations of methyl- and propylparaben (MeP-PrP) mixtures on the growth and photosynthetic performance of a marine (Dunaliella tertiolecta) and a freshwater (Scenedesmus rubescens) microalgal species. Algal cultures were exposed to a range of MeP-PrP concentrations (0.5-10 μg L; 1:1 ratio) for 72 h. Growth, pigments composition, chlorophyll fluorescence transient analysis (JIP-test) and rapid light curves (RLC) through Pulse-Amplitude-Modulation (PAM) fluorometry were evaluated. Both D. tertiolecta and S. rubescens exhibited reduced growth rates upon exposure to PBs, while, in D. tertiolecta a concentration-dependent increase in photosynthetic pigments also appeared. The following gradual attenuation of growth inhibition suggests a stress-induced upregulation to prolonged exposure. Notably, the PBs mixture showed toxicity at lower concentrations than the reported for single ones. According to photosynthetic yields and performance and energy dissipation indices, structure and function of both species photosynthetic apparatus was not significantly affected, though, S. rubescens was more functionally efficient but stress-sensitive compared to D. tertiolecta. However, they both experienced impaired abilities to adapt to increasing light intensity, through reduced electron transport rates (ETR), particularly under higher PBs concentrations. Moreover, D. tertiolecta activated photoprotection mechanisms to grow without photodamage risk. The species-specific responses to PBs, could be attributed to the absence of a cell wall in D. tertiolecta. The impact of PBs mixtures on photosynthetic acclimation, raise concerns for the risk of chronic or combined pollutant exposure. |
| format | Artículo científico |
| id | pubmed_41242166 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Marine environmental research |
| record_format | pubmed |
| spellingShingle | Algal growth and photosynthetic responses of Dunaliella tertiolecta and Scenedesmus rubescens to methyl- and propylparaben mixtures. Bilida, Anna Grammatikopoulos, George Dailianis, Stefanos Photosynthesis Scenedesmus Water Pollutants, Chemical Parabens Chlorophyll Chlorophyceae Microalgae Algal growth and photosynthetic responses of Dunaliella tertiolecta and Scenedesmus rubescens to methyl- and propylparaben mixtures. Bilida, Anna Grammatikopoulos, George Dailianis, Stefanos Photosynthesis Scenedesmus Water Pollutants, Chemical Parabens Chlorophyll Chlorophyceae Microalgae This study investigates the effects of environmentally relevant concentrations of methyl- and propylparaben (MeP-PrP) mixtures on the growth and photosynthetic performance of a marine (Dunaliella tertiolecta) and a freshwater (Scenedesmus rubescens) microalgal species. Algal cultures were exposed to a range of MeP-PrP concentrations (0.5-10 μg L; 1:1 ratio) for 72 h. Growth, pigments composition, chlorophyll fluorescence transient analysis (JIP-test) and rapid light curves (RLC) through Pulse-Amplitude-Modulation (PAM) fluorometry were evaluated. Both D. tertiolecta and S. rubescens exhibited reduced growth rates upon exposure to PBs, while, in D. tertiolecta a concentration-dependent increase in photosynthetic pigments also appeared. The following gradual attenuation of growth inhibition suggests a stress-induced upregulation to prolonged exposure. Notably, the PBs mixture showed toxicity at lower concentrations than the reported for single ones. According to photosynthetic yields and performance and energy dissipation indices, structure and function of both species photosynthetic apparatus was not significantly affected, though, S. rubescens was more functionally efficient but stress-sensitive compared to D. tertiolecta. However, they both experienced impaired abilities to adapt to increasing light intensity, through reduced electron transport rates (ETR), particularly under higher PBs concentrations. Moreover, D. tertiolecta activated photoprotection mechanisms to grow without photodamage risk. The species-specific responses to PBs, could be attributed to the absence of a cell wall in D. tertiolecta. The impact of PBs mixtures on photosynthetic acclimation, raise concerns for the risk of chronic or combined pollutant exposure. |
| title | Algal growth and photosynthetic responses of Dunaliella tertiolecta and Scenedesmus rubescens to methyl- and propylparaben mixtures. |
| topic | Photosynthesis Scenedesmus Water Pollutants, Chemical Parabens Chlorophyll Chlorophyceae Microalgae |
| url | https://pubmed.ncbi.nlm.nih.gov/41242166/ |