Enhanced accumulation of alpha-linolenic acid rich lipids in indigenous freshwater microalga Desmodesmus sp.: The effect of low-temperature on nutrient replete, UV treated and nutrient stressed cultures
| Autor: | V.S. Chauhan, P.V. Sijil, Ravi Sarada |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Environmental Engineering Lipid accumulation Nitrogen Fresh Water Bioengineering 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Nutrient Chlorophyceae 010608 biotechnology Microalgae Biomass Food science Waste Management and Disposal Incubation 0105 earth and related environmental sciences biology Renewable Energy Sustainability and the Environment alpha-Linolenic acid alpha-Linolenic Acid Desmodesmus Nutrients General Medicine Lipid Metabolism biology.organism_classification Lipids Cold Temperature Nitrogen stress chemistry Lipid content Uv treatment |
| Zdroj: | Bioresource Technology. 273:404-415 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2018.11.028 |
| Popis: | The indigenous microalga, Desmodesmus sp. produced alpha-linolenic acid (ALA) rich lipids in response to low temperature and UV treatment. Incubation at 5 °C showed a 1.5 fold increase in lipid content (34% w/w) with 44% ALA fraction of total fatty acids. The UV treatment (UV 60 min) exhibited a 1.4 fold increase in biomass productivity and 1.6 fold increase in lipid content (37% w/w) with ALA fraction as 31% of total fatty acids. The nitrogen stress enhanced the lipid content (39% w/w) with a reduced ALA fraction (18%) of total fatty acids. The UV treated cultures (UV 40 and 60 min) on incubation at 5 °C showed maximum lipid accumulation (59 to 62% w/w) with ALA fraction of total fatty acids as 39 to 42%. The incubation of nutrient-replete and UV treated cultures at low-temperature could therefore be used for the production of ALA-rich lipids in microalgae. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect