Academic Scientific JournalsDefense responses of the green microalgae Chlorella vulgaris to the vanadium pentoxide nanoparticles
DOI:
https://doi.org/10.26881/oahs-2023.4.06Keywords:
Chlorella vulgaris, Algae, V2 O5 nanoparticles, Oxidative stress, Antioxidant enzymesAbstract
Although vanadium-based nanomaterials have found extensive use in industry, their influence on ecosystems and living organisms is not yet well investigated. In this study, hydrothermal methods were utilized for the synthesis of vanadium pentoxide nanoparticles (V2 O5 NPs). The gained NPs were characterized using XRD, FT-IR, EDS, DLS, SEM and TEM techniques. Subsequently, the toxic effects of V2 O5 NPs on the model green microalgae Chlorella vulgaris were evaluated. According to the obtained results, V2 O5 NPs caused a significant reduction in cell number and biomass production of algae in a dose and time dependent manner. Moreover, flow cytometric analysis confirmed a reduction in the quantity of living cells. Scanning electron microscopy showed plasmolysis and deformation of the cells after exposure to nanoparticles. The photosynthetic pigments and phenolics content exhibited a decrease in comparison with the control sample. Although, non-enzymatic antioxidant system in C. vulgaris displayed an average action, antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) showed a dose dependent increasing trend. These intercellular reactions designated the activation of the antioxidant defense system in response to the induced oxidative stress by V2 O5 NPs.
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