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- W4328105040 endingPage "131215" @default.
- W4328105040 startingPage "131215" @default.
- W4328105040 abstract "Indicators signaling Arsenic (As) stress through physiology of microalgae using non-destructive methods like variable fluorescence are rare but requisite. This study reports stress markers indicating arsenic (As) toxicity (in two concentrations 11.25 µg/L and 22.5 µg/L compared to a control) exposed to a microalga (Diacronema lutheri), using fast repetition rate fluorometry (FRRf). Growth and physiological parameters such as cell density, chl a and the maximum quantum yield Fv/Fm showed coherence and impeded after the exponential phase (day 9 - day 12) in As treatments compared to the control (p < 0.05). On contrary photo-physiological constants were elevated showing higher optical (aLHII) and functional [Sigma (σPSII)] absorption cross-section for the As treatments (p < 0.05) further implying the lack of biomass production yet an increase in light absorption. In addition, As exposure increased the energy dissipation by heat (NPQ-NSV) showing a strong relationship with the de-epoxidation ratio (DR) involving photoprotective pigments. Total As bioaccumulation by D. lutheri showed a strong affinity with Fe adsorption throughout the algal growth curve. This study suggests some prompt photo-physiological proxies signaling As contamination and endorsing its usefulness in risk assessments, given the high toxicity and ubiquitous presence of As in the ecosystem." @default.
- W4328105040 created "2023-03-22" @default.
- W4328105040 creator A5009998802 @default.
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- W4328105040 creator A5075057494 @default.
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- W4328105040 creator A5090166324 @default.
- W4328105040 date "2023-06-01" @default.
- W4328105040 modified "2023-09-25" @default.
- W4328105040 title "Assessing indicators of arsenic toxicity using variable fluorescence in a commercially valuable microalgae: Physiological and toxicological aspects" @default.
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- W4328105040 doi "https://doi.org/10.1016/j.jhazmat.2023.131215" @default.
- W4328105040 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37001210" @default.