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Appl Biochem Biotechnol. 2012 Apr;166(8):2127-37. doi: 10.1007/s12010-012-9639-2. Epub 2012 Mar 14.

Effects of light intensity on the growth and lipid accumulation of microalga Scenedesmus sp. 11-1 under nitrogen limitation.

Author information

1
Key Laboratory of Biofuels, Qingdao Institute of BioEnergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.

Abstract

Scenedesmus spp. have been reported as potential microalgal species used for the lipid production. This study investigated the effects of light intensity (at three levels: 50, 250, and 400 μmol photons m(-2) s(-1)) on the growth and lipid production of Scenedesmus sp. 11-1 under N-limited condition. Carotenoid to chlorophyll ratio was higher when algae 11-1 grew under 250 and 400 μmol photons m(-2) s(-1) than that under 50 μmol photons m(-2) s(-1), while protein contents was lower. Highest biomass yield (3.88 g L(-1)), lipid content (41.1 %), and neutral lipid content (32.9 %) were achieved when algae 11-1 grew at 400 μmol photons m(-2) s(-1). Lipid production was slight lower at 250 μmol photons m(-2) s(-1) level compared to 400 μmol photons m(-2) s(-1). The major fatty acids in the neutral lipid of 11-1 were oleic acid (43-52 %), palmitic acid (24-27 %), and linoleic acid (7-11 %). In addition, polyunsaturated fatty acids had a positive correlation with total lipid production, and monounsaturated fatty acids had a negative one.

PMID:
22415786
DOI:
10.1007/s12010-012-9639-2
[Indexed for MEDLINE]

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