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Laboratory evolution strategies for improving lipid accumulation in Yarrowia lipolytica

  • Alexandra Daskalaki
  • Nikolitsa Perdikouli
  • Dimitra Aggeli
  • George AggelisEmail author
Applied microbial and cell physiology
  • 151 Downloads

Abstract

Oleaginous microorganisms are of high biotechnological interest being considered as alternative sources of oil (single cell oil—SCO). Current research for increasing productivity of oleaginous microorganisms is focused on the overexpression of genes implicated in lipid synthesis, the inactivation of genes implicated in storage lipid turnover, and on the suppression of competitive to lipid biosynthesis pathways. An alternative strategy, described here, relies on evolution of Yarrowia lipolytica under alternating environments that promote growth, encourage storage lipid synthesis, and reward high energy-containing cells. Derived populations were characterized biochemically, especially on their ability to accumulate lipids, and compared with the starting strain. Interestingly, lipid-accumulating ability early in the evolution was decreased compared with the starting strain. Subsequently, oleaginous lineages dominated, leading to populations able to accumulate lipids in high amounts. A population obtained after 77 generations was able to accumulate 44% w/w of lipid, which was 30% higher than that of the starting strain. We conclude that evolution-based strategies can be utilized as a robust tool for improving lipid accumulation capacity in oleaginous microorganisms.

Keywords

Yarrowia lipolytica Laboratory evolution Lipid accumulation 

Notes

Funding information

The project was financially supported by the University of Patras.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

Ethical approval

This article does not contain any studies with human participants performed by any of the authors.

Supplementary material

253_2019_10088_MOESM1_ESM.pdf (1.3 mb)
ESM 1 (PDF 1298 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Unit of Microbiology, Division of Genetics, Cell and Developmental Biology, Department of BiologyUniversity of PatrasPatrasGreece
  2. 2.Department of Biological SciencesLehigh UniversityBethlehemUSA

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