Fatty acid composition of several wild microalgae and cyanobacteria, with a focus on eicosapentaenoic, docosahexaenoic and α-linolenic acids for eventual dietary uses

A. Catarina Guedes, Helena M. Amaro, Catarina R. Barbosa, Ricardo D. Pereira, F. Xavier Malcata*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)

Abstract

A total of 13 species of microalgae and 14 strains of cyanobacteria, collected directly in the Portuguese coast and lagoons, were characterized for their fatty acid contents, focusing on two with a market potential - i.e. eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA); and another already with alternative (yet somehow more expensive) natural sources - i.e. α-linolenic (ALA) acid. The purpose of this work was their eventual inclusion as additives in food or feed. ALA was the most abundant PUFA in Nannochloropsis sp. (0.616±0.081mgFA.Lculture-1.d -1), and EPA in Phaeodactylum tricornutum (0.148±0.013mgFA.Lculture-1.d -1); Pavlova lutheri was particularly rich in EPA (0.290±0.005mgFA.Lculture-1.d -1) and DHA (0.140±0.037mgFA.Lculture-1.d -1). Despite several previous reports on similar topics and encompassing some of our microalgal species, the wild nature of our strains accounts for the novelty of this work - in addition to the characterization of a few wild cyanobacteria. Eustigmatophyceae class was the best producer of ALA, while Prymnesiophyceae was the best for EPA and ALA. Nodularia harveyana exhibited the highest ALA level (0.611±0.022mgFA.Lculture-1.d -1) and Gloeothece sp. was highest in EPA (0.030±0.004mgFA.Lculture-1.d -1).
Original languageEnglish
Pages (from-to)2721-2729
Number of pages9
JournalFood research international
Volume44
Issue number9
DOIs
Publication statusPublished - Nov 2011

Keywords

  • ALA
  • DHA
  • EPA
  • Lipid profile
  • Microorganism
  • PUFA

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