Rapid induction of edible lipids in Chlorella by mild electric stimulation

Sun A. Choi, Soo Youn Lee, Jiye Lee, Jun Muk Cho, Jin Suk Lee, Seung Wook Kim, Dong Yeon Kim, Se Kook Park, Chang Soo Jin, You Kwan Oh

Research output: Contribution to journalArticle

Abstract

In this work, a new stress-based method for rapid induction of triacylglycerol (TAG) and total and polyunsaturated fatty acid accumulations in Chlorella sp. by mild electric stimulation is presented. When a cathodic current of 31 mA (voltage: 4 V) was applied to the algal cells for 4 h, the TAG content of the electro-treated cells was sharply increased to a level 2.1 times that of the untreated control. The contents of the polyunsaturated linoleic (C18:2n6) and linolenic (C18:3n3) acids in the electro-treated cells were also 36 and 57% higher than those in the untreated cells, respectively. Cyclic voltammetry and various biochemical analyses indicate that TAG and fatty acid formations are electro-stimulated via de novo fatty acid biosynthesis and metabolic transformation in the Chlorella cells.

Original languageEnglish
Number of pages1
JournalBioresource technology
Volume292
DOIs
Publication statusPublished - 2019 Nov 1

Keywords

  • Chlorella
  • Electric stimulation
  • Essential polyunsaturated fatty acids
  • Lipid induction
  • Triacylglycerol

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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  • Cite this

    Choi, S. A., Lee, S. Y., Lee, J., Cho, J. M., Lee, J. S., Kim, S. W., Kim, D. Y., Park, S. K., Jin, C. S., & Oh, Y. K. (2019). Rapid induction of edible lipids in Chlorella by mild electric stimulation. Bioresource technology, 292. https://doi.org/10.1016/j.biortech.2019.121950