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Applied Microbiology and Biotechnology

, Volume 102, Issue 12, pp 5279–5297 | Cite as

Impact of temperature on fatty acid composition and nutritional value in eight species of microalgae

  • Justine Aussant
  • Freddy Guihéneuf
  • Dagmar B. Stengel
Applied microbial and cell physiology

Abstract

Microalgae are considered a sustainable source of high-value products with health benefits. Marine algae-derived omega-3 long-chain polyunsaturated fatty acids (LC-PUFA), such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are considered dietary elements with effects on mental health, cognition enhancement, and cardiovascular protection. This study investigated the temperature effect on omega-3 LC-PUFA production in eight species of microalgae from various taxonomic groups, with a focus on achieving an optimal balance between omega-3 accumulation and efficient growth performance. Samples were batch-cultivated at four different temperatures, with constant light, and fatty acid methyl esters (FAME) were analyzed by gas chromatography. Several nutritional indices were calculated to assess the potential value of biomass produced for human consumption. Two promising candidates were identified suitable for batch cultivation and large-scale production: Nannochloropsis oculata for EPA and Isochrysis galbana for DHA production, with optimum productivities obtained between 14 and 20 °C, and nutritional indices falling within the range required for nutritional benefit.

Keywords

Microalgae Docosahexaenoic acid (DHA) Eicosapentaenoic acid (EPA) Omega-3 fatty acids Nutrition 

Notes

Acknowledgements

This work was supported by SMART FOOD Science based Intelligent/Functional and Medical Foods for Optimum Brain Health, Targeting Depression and Cognition.

Funding

This study was funded by the Department of Agriculture, Food and the Marine of Ireland (grant number ref. no. 13F 411).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

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

Supplementary material

253_2018_9001_MOESM1_ESM.pdf (173 kb)
ESM 1 (PDF 173 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environment, Marine and Energy ResearchNational University of Ireland GalwayGalwayIreland

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