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Kwidzińska, Klaudia; Zalewska, Martyna; Aksmann, Anna; Kobos, Justyna; Mazur-Marzec, Hanna; Caban, Magda
Journal of hazardous materials, 06/2024, Letnik: 471Journal Article
The cyanobacterial response to pharmaceuticals is less frequently investigated compared to green algae. Pharmaceuticals can influence not only the growth rate of cyanobacteria culture, but can also cause changes at the cellular level. The effect of diclofenac (DCF) as one of the for cyanobacteria has been rarely tested, and DCF has never been applied with cellular biomarkers. The aim of this work was to test the response of two unicellular cyanobacteria (Synechocystis salina and Microcystis aeruginosa) toward DCF (100 mg L−1) under photoautotrophic growth conditions. Such endpoints were analyzed as cells number, DCF uptake, the change in concentrations of photosynthetic pigments, the production of toxins, and chlorophyll a in vivo fluorescence. It was noted that during a 96 h exposure, cell proliferation was not impacted. Nevertheless, a biochemical response was observed. The increased production of microcystin was noted for M. aeruginosa. Due to the negligible absorption of DCF into cells, it is possible that the biochemical changes are induced by an external signal. The application of non-standard biomarkers demonstrates the effect of DCF on microorganism metabolism without a corresponding effect on biomass. The high resistance of cyanobacteria to DCF and the stimulating effect of DCF on the secretion of toxins raise concerns for environment biodiversity. Display omitted •S. salina and M. aeruginosa were exposed for 96-h to diclofenac (DCF).•The 100 mg of DCF per L has no impact on grow rate and pigments concentration.•The production of microcystins was higher when M. aeruginosa was exposed to DCF.•Photosynthetic apparatus of both strains responded differently to DCF.•The multi-biomarker test show resistance to DCF, but biochemical response was noted.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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