Abstract
Polyunsaturated fatty acids are essential biomolecules to human health since their consumption is associated with decreased risk of cardiovascular, inflammatory and cancer diseases, for instance. Despite largely unexplored, sub-Antarctic macroalgae have a considerable nutraceutical potential since this region is known for its harsh environmental conditions, which forces macroalgae to produce secondary metabolites. Therefore, the aims of this work were to determine the fatty acid profile of Ulva sp., Lessonia flavicans Bory and Pyropia columbina (Montagne) W.A. Nelson collected from different collection sites in the Magellan region. Results showed that macroalgae were comprised of 18 to 24 fatty acids with generally a predominance of saturated fatty acids (SFAs) than unsaturated fatty acids. SFAs comprehended 34.40 ± 0.61 mol% of Lessonia flavicans while Pyropia columbina had 69.06 ± 0.77 mol% mainly in the form of palmitic acid. Polyunsaturated fatty acids were found in concentrations ranging from 15.80 ± 0.56 mol% in Pyropia columbina to 54.93 ± 0.15 in Lessonia flavicans. The nutraceutical potential of these macroalgae was observed as the samples had a ∑n3/∑n6 ratio above the indicated by the World Health Organization. Principal Component Analysis showed that the fatty acid profile is characteristic of each macroalgae being a biochemical marker for the identification of the organisms. Therefore, sub-Antarctic macroalgae comprise a promising renewable source of essential fatty acids, mainly as n3, that are essential to the maintenance of human health.
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Acknowledgements
The authors are thankful for the financial and fellowship support from the Brazilian research funding agencies National Council for Scientific and Technological Development (CNPq), Coordination for Improvement of Higher Level Personnel (CAPES) and Foundation for Research Support of the State of Rio Grande do Sul (FAPERGS).
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MAZdS was involved in conceptualization. NLG was involved in methodology. LMB was involved in writing—original draft preparation. AM was involved in writing—review and editing. CMPdP was involved in funding acquisition. MSAE arranged resources.
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dos Santos, M.A.Z., Berneira, L.M., Goulart, N.L. et al. Rhodophyta, Ochrophyta and Chlorophyta macroalgae from different sub-Antarctic regions (Chile) and their potential for polyunsaturated fatty acids. Braz. J. Bot 44, 429–438 (2021). https://doi.org/10.1007/s40415-021-00712-0
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DOI: https://doi.org/10.1007/s40415-021-00712-0