Physiological and transcriptome profiling of Chlorella sorokiniana: A study on azo dye wastewater decolorization

0579195 - ÚPT 2024 RIV NL eng J - Článek v odborném periodiku
Tarbajová, V. - Koláčková, M. - Chaloupsky, P. - Dobešová, M. - Cápal, Petr - Pilát, Zdeněk - Samek, Ota - Zemánek, Pavel - Švec, P. - Skopalová Štěrbová, D. - Vaculovičová, M. - Richtera, L. - Pérez-de-Mora, A. - Adam, V. - Húska, D.
Physiological and transcriptome profiling of Chlorella sorokiniana: A study on azo dye wastewater decolorization.
Journal of Hazardous Materials. Roč. 460, 15 October (2023), č. článku 132450. ISSN 0304-3894. E-ISSN 1873-3336
Institucionální podpora: RVO:68081731 ; RVO:61389030
Klíčová slova: pigment * Microalgae * bioremediation * RNA-seq * Raman micro-spectroscopy * Fourier transform infrared spectroscopy
Obor OECD: Analytical chemistry; Environmental sciences (social aspects to be 5.7) (UEB-Q)
Impakt faktor: 13.6, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0304389423017338

Over decades, synthetic dyes have become increasingly dominated by azo dyes posing a significant environmental risk due to their toxicity. Microalgae-based systems may offer an alternative for treatment of azo dye effluents to conventional physical-chemical methods. Here, microalgae were tested to decolorize industrial azo dye wastewater (ADW). Chlorella sorokiniana showed the highest decolorization efficiency in a preliminary screening test. Subsequently, the optimization of the experimental design resulted in 70% decolorization in a photobioreactor. Tolerance of this strain was evidenced using multiple approaches (growth and chlorophyll content assays, scanning electron microscopy (SEM), and antioxidant level measurements). Raman microspectroscopy was employed for the quantification of ADW-specific compounds accumulated by the microalgal biomass. Finally, RNA-seq revealed the transcriptome profile of C. sorokiniana exposed to ADW for 72 h. Activated DNA repair and primary metabolism provided sufficient energy for microalgal growth to overcome the adverse toxic conditions. Furthermore, several transporter genes, oxidoreductases-, and glycosyltransferases-encoding genes were upregulated to effectively sequestrate and detoxify the ADW. This work demonstrates the potential utilization of C. sorokiniana as a tolerant strain for industrial wastewater treatment, emphasizing the regulation of its molecular mechanisms to cope with unfavorable growth conditions.
Trvalý link: https://hdl.handle.net/11104/0348044