title: Light intensity and N/P nutrient affect the accumulation of lipid and unsaturated fatty acids by Chlorella sp.
abstract: In this study, different light intensities (80, 160, 240 and 320 μmol/m(2) s) and various mediums including control medium (CM), N/P rich medium (NPM), N rich medium (NM), and P rich medium (PM) were applied for cultivation of Chlorella sp. It was revealed that cultivation of Chlorella sp. in CM under the light intensity of 320 μmol/m(2) s led to a lipid content up to 30% enhancement, which was higher than the results of other cases. A rather high unsaturated fatty acid (UFA) content of 7.5% and unsaturated fatty acid/total fatty acid (UFA/TFA) ratio of 0.73 were obtained under 320 μmol/m(2) s in CM, indicating that the CM-320 system was applicable for the generation of UFA. Moreover, Chlorella sp. cultivated in PM under 320 μmol/m(2) s provided higher TFA content (7.3%), which was appropriate for biofuel production.
authors.affiliation: College of Energy, Xiamen University, Xiamen 361005, China.
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Guo
authors.affiliation: College of Energy, Xiamen University, Xiamen 361005, China.
authors.forename: Gaomin
authors.initials: G
authors.lastname: Su
authors.affiliation: College of Energy, Xiamen University, Xiamen 361005, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Li
authors.affiliation: College of Energy, Xiamen University, Xiamen 361005, China.
authors.forename: Jingyu
authors.initials: J
authors.lastname: Chang
authors.affiliation: College of Energy, Xiamen University, Xiamen 361005, China; The Key Laboratory for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen 361005, China. Electronic address: xianhai.zeng@xmu.edu.cn.
authors.forename: Xianhai
authors.initials: X
authors.lastname: Zeng
authors.affiliation: College of Energy, Xiamen University, Xiamen 361005, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Chemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; The Key Laboratory for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen 361005, China.
authors.forename: Yinghua
authors.initials: Y
authors.lastname: Lu
authors.affiliation: College of Energy, Xiamen University, Xiamen 361005, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Lin
mesh_terms: D002708:Chlorella / Q000254:growth & development / Q000378:metabolism*; D005231:Fatty Acids, Unsaturated / Q000378:metabolism*; D008027:Light; D050356:Lipid Metabolism; D009584:Nitrogen / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism*
chemical_list: D005231:Fatty Acids, Unsaturated; D010758:Phosphorus; D009584:Nitrogen
keywords: Cultivation; Light intensity; Lipid accumulation; Unsaturated fatty acids