4.5 Article

Effect of cultivation mode on the production of docosahexaenoic acid by Tisochrysis lutea

期刊

AMB EXPRESS
卷 8, 期 -, 页码 -

出版社

SPRINGER
DOI: 10.1186/s13568-018-0580-9

关键词

Docosahexaenoic acid (DHA); Total fatty acids (TFAs); Mixotrophy; Heterotrophy; Tisochrysis lutea

资金

  1. Collaborative Innovation Center of Suzhou Nano Science and Technology
  2. Programme for Changjiang Scholars and Innovative Research Team in University
  3. Fundamental Research Funds for the Central Universities

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In this study, Tisochrysis lutea was cultivated in mixotrophic and heterotrophic cultures with glycerol as a carbon source and with glucose and acetate for comparison; autotrophic cultivation was the control group without a carbon source. It was found that T. lutea used glycerol and did not use glucose and acetate under mixotrophy. Mixotrophy slightly elevated the docosahexaenoic acid (DHA) and total fatty acids (TFA) content in the dry-weight and enhanced the DHA and TFA production in medium (41.3 and 31.9% respectively) at the end of a 16-day cultivation, while heterotrophy reduced the DHA content and TFA production. Under the mixotrophy, the glycerol contribution to the DHA production (16.19 mg/L) and the TFA production (97.8 mg/L) was not very high and the DHA yield [2.63% chemical oxygen demand (COD)] and TFA yield (13.1% COD) were also very low. Furthermore, T. lutea using glycerol had a period of adaptation, indicating that T. lutea was not an ideal microalga for organic carbon utilization.

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