Photocatalyst (TiO2) as an enhancer: an attempt to enhance the production of carotenoids and lipids with the combined oxidative stresses in Coelastrella sp. M60
| Autor: | Perumal Varalakshmi, Balasubramaniem Ashokkumar, Sevugarajan Ariraman, Selvaraj Pushpalatha, Ramalingam Sangeetha |
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| Rok vydání: | 2020 |
| Předmět: |
Economics and Econometrics
Environmental Engineering Osmotic shock 020209 energy chemistry.chemical_element 02 engineering and technology Oxidative phosphorylation 010501 environmental sciences Management Monitoring Policy and Law medicine.disease_cause 01 natural sciences chemistry.chemical_compound Astaxanthin 0202 electrical engineering electronic engineering information engineering medicine Environmental Chemistry Food science Carotenoid 0105 earth and related environmental sciences chemistry.chemical_classification General Business Management and Accounting Nitrogen Salinity Zeaxanthin chemistry Oxidative stress |
| Zdroj: | Clean Technologies and Environmental Policy. 23:41-53 |
| ISSN: | 1618-9558 1618-954X |
| DOI: | 10.1007/s10098-020-01879-y |
| Popis: | Microalgae are important biological resources which attract the researchers for the production of valuable products like bio-energy and value-added products. In this study, enhanced accumulation of carotenoids and lipids was obtained from Coelastrella sp. M60 which was grown at 40 °C, along with different stress conditions (nitrogen starvation, salinity and TiO2). The results clearly indicate that osmotic stress and nitrogen starvation along with high temperature had induced the yield of zeaxanthin (13.15 mg/g DCW) and the lipid content (39.51 ± 5.13%). Further, it was also observed that TiO2 combined with other stresses had induced the increased accumulation of astaxanthin and zeaxanthin up to 1.16 and 0.51 fold on the 10th day of cultivation. On the contrary, TiO2, along with other stress conditions had influenced the biomass production up to 1.16 fold than the control, but no detectable increase in lipid content was observed. Thus, for the first time it is reported that by employing combined stress factors such as high temperature, nitrogen starvation and 3% salinity had resulted in significant improvement in zeaxanthin production in the foresaid microalgae. Further, it was also noticed that the Coelastrella sp. M60 had accumulated the carotenoids and lipids under TiO2 along with other oxidative stress conditions within the short duration. |
| Databáze: | OpenAIRE |
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