期刊
BIORESOURCE TECHNOLOGY
卷 213, 期 -, 页码 198-203出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.02.078
关键词
Scenedesmus quadricauda; Biomass; Nitrogen stress mediated lipid accumulation; Biodiesel; Stress Responsive Hormone: ABA
资金
- DST-SERB, Government of India [SB/YS/LS-13/2013]
- DST-INSPIRE fellowship of Department of Science and Technology, New Delhi
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 24 h (27.21 pmol/L) during the onset of nitrogen starvation followed by a sharp decline. The external supplemented ABA showed a positive effect on growth pattern (38 x 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 2 mu M 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. (C) 2016 Elsevier Ltd. All rights reserved.
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