title: Influence of abscisic acid on growth, biomass and lipid yield of Scenedesmus quadricauda under nitrogen starved condition.
abstract: Scenedesmus quadricauda, accumulated more lipid but with a drastic reduction in biomass yield during nitrogen starvation. Abscisic acid (ABA) being a stress responsible hormone, its effect on growth and biomass with sustainable lipid yield during nitrogen depletion was studied. The result revealed that the ABA level shoots up at 24h (27.21pmol/L) during the onset of nitrogen starvation followed by a sharp decline. The external supplemented ABA showed a positive effect on growth pattern (38×10(6)cells/ml) at a lower concentration. The dry biomass yield is also increasing up to 2.1 fold compared to nitrogen deficient S. quadricauda. The lipid content sustains in 1 and 2μM concentration of ABA under nitrogen-deficient condition. The fatty acid composition of ABA treated S. quadricauda cultures with respect to nitrogen-starved cells showed 11.17% increment in saturated fatty acid content, the desired lipid composition for biofuel application.
authors.affiliation: Biotechnology Division, National Institute for Interdisciplinary Science and Technology (NIIST), Council of Scientific and Industrial Research (CSIR), Trivandrum, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), India.
authors.forename: Sujitha Balakrishnan
authors.initials: SB
authors.lastname: Sulochana
authors.affiliation: Biotechnology Division, National Institute for Interdisciplinary Science and Technology (NIIST), Council of Scientific and Industrial Research (CSIR), Trivandrum, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), India. Electronic address: arumugam@niist.res.in.
authors.forename: Muthu
authors.initials: M
authors.lastname: Arumugam
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism* / Q000494:pharmacology; D056804:Biofuels; D018533:Biomass; D005227:Fatty Acids / Q000737:chemistry / Q000378:metabolism; D050356:Lipid Metabolism / Q000187:drug effects*; D009584:Nitrogen / Q000378:metabolism*; D044444:Scenedesmus / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*
chemical_list: D056804:Biofuels; D005227:Fatty Acids; D000040:Abscisic Acid; D009584:Nitrogen
keywords: Biodiesel; Biomass; Nitrogen stress mediated lipid accumulation; Scenedesmus quadricauda; Stress Responsive Hormone: ABA