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Stress enhances poly-unsaturation rich lipid accumulation in Chlorella sp. and Chlamydomonas sp.

Ajam, Yakub Shekh and Preeti, Shrivastava and Kannan, Krishnamurthi and Sandeep, N. Mudliar (2016) Stress enhances poly-unsaturation rich lipid accumulation in Chlorella sp. and Chlamydomonas sp. Biomass and Bioenergy, 84. pp. 59-66.

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Abstract

In the present study, effects of various cultivation conditions on biomass and lipid productivity, detail FAME signature, CO2 biofixation and elemental composition of Chlorella sp. and Chlamydomonas sp. have been investigated. In Chlorella sp., N-depletion has enhanced the lipid productivity by 12.70e14.61%. In Chlamydomonas sp., though the lipid content has increased by 22e26% upon N-depletion, lipid productivity has not changed significantly due to concomitant decrease in biomass productivity by 18e25%. The presence of lipid was also confirmed by FTIR spectroscopic analysis of biomass. The characteristic bands observed at 1744.30 cm�1 (Chlamydomonas sp.) and (Chlorella sp.) were credited to lipids due to C eO mode of the side chain from ester carbonyl group. Extracted lipid was transesterified to FAMEs. Chlorella sp. at N-replete indoor condition has produced the highest weight percentage of C16:0 (26.64%), C18:0 (3.77%) and C18:1 (27.94%). In Chlamydomonas sp., N-replete indoor condition has resulted in maximum content of MUFA (30.12%), LUFA (53.35%), second highest SFA (29.22%) and DUFA (23.23%). Inverse relationship was observed between MUFA and PUFA at all cultivation conditions. In both the microalgae, C16:0, C18:1 (9), C18:2 (9, 12), C18:3 (9, 12, 15) were identified as the major FAMEs which are suitable to be used as biodiesel components

Item Type: Article
Uncontrolled Keywords: Microalgae FAME Chlorella sp. Chlamydomonas sp. Nitrogen limitation
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: 30 Jun 2017 06:34
Last Modified: 30 Jun 2017 06:34
URI: http://ir.cftri.com/id/eprint/12712

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