期刊
BIORESOURCE TECHNOLOGY
卷 214, 期 -, 页码 319-327出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.04.112
关键词
Astaxanthin; Biofuels; Chlorella zofingiensis; Integrated production; Stress conditions; Triacylglycerol
资金
- National Natural Science Foundation of China [31571807]
- start-up grant from National Youth Thousand Talents Program
- 985 Project of Peking University
The production of lipids and astaxanthin, a high-value carotenoid, by Chlorella zofingiensis was investigated under different culture conditions. Comparative analysis revealed a good correlation between triacylglycerol (TAG) and astaxanthin accumulation in C. zofingiensis. Stress conditions promoted cell size and weight and induced the accumulation of neutral lipids, especially TAG and astaxanthin, with a concomitant decrease in membrane lipids. The highest contents of TAG and astaxanthin achieved were 387 and 4.89 mg g(-1) dry weight, respectively. A semi-continuous culture strategy was developed to optimize the TAG and astaxanthin productivities, which reached 297 and 3.3 mg L-1 day(-1), respectively. Additionally, astaxanthin accumulation was enhanced by inhibiting de novo fatty acid biosynthesis. In summary, our study represents a pioneering work of utilizing Chlorella for the integrated production of lipids and high-value products and C. zofingiensis has great potential to be a promising production strain and serve as an emerging oleaginous model alga. (C) 2016 Elsevier Ltd. All rights reserved.
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