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.

Sijil, P. V. and Sarada, R. and Chauhan, V. S. (2019) 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. Bioresource Technology, 273. pp. 404-415.

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Abstract

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.

Item Type:	Article
Uncontrolled Keywords:	Desmodesmus sp. Alpha-linolenic acid Low-temperature stress UV treatment Nutrient stress
Subjects:	500 Natural Sciences and Mathematics > 08 Botanical sciences > 01 Botany > 01 Algae
Divisions:	Plant Cell Biotechnology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	04 Feb 2019 06:46
Last Modified:	04 Feb 2019 06:46
URI:	http://ir.cftri.res.in/id/eprint/13915

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