Spatial, seasonal, and within-plant variation in total fatty acid content and composition in the brown seaweeds Dictyota bartayresii and Dictyopteris australis (Dictyotales, Phaeophyceae)

B J Gosch; Nicholas A Paul; R De Nys; M Magnusson

doi:10.1007/s10811-014-0474-4

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Spatial, seasonal, and within-plant variation in total fatty acid content and composition in the brown seaweeds Dictyota bartayresii and Dictyopteris australis (Dictyotales, Phaeophyceae)

Journal article

Peer reviewed

Spatial, seasonal, and within-plant variation in total fatty acid content and composition in the brown seaweeds Dictyota bartayresii and Dictyopteris australis (Dictyotales, Phaeophyceae)

B J Gosch, Nicholas A Paul, R De Nys and M Magnusson

Journal of Applied Phycology, Vol.27(4), pp.1607-1622

2015

DOI: https://doi.org/10.1007/s10811-014-0474-4

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Abstract

dictyopteris

dictyota

fatty acids

macroalgae

PUFA

seaweed

We investigated the spatial, seasonal, and within-plant variation in total fatty acids (TFA) and fatty acid (FA) composition in the brown seaweeds Dictyota bartayresii sampled from Nelly Bay, Orpheus Island, and Kissing Point (Northern Queensland, Australia) and Dictyopteris australis sampled from Nelly Bay. Both species were present year round, but with no consistent seasonal pattern in plant size, and had an annualized mean content of TFA of 5 % dry weight (dw) that is among the highest recorded for seaweeds. For Dictyota, larger plants had a higher content of TFA and a higher proportion of polyunsaturated omega-3 FA (PUFA(n-3)) than smaller plants, while for Dictyopteris, the TFA content and the proportion of PUFA(n-3) were unrelated to plant size. TFA in Dictyota varied considerably between locations (~40 %) (3.5-5.5 % dw) and to a lesser degree between seasons (~10 %) with a lower content of TFA and higher proportion of PUFA(n-3) in winter. Dictyopteris had an ~10 % higher content of TFA in winter but with no seasonal pattern in the composition of FA. There was also within-plant variation in FA, as TFA decreased from the tips toward the base in both species, and in Dictyopteris, the tips had a higher proportion of saturated FA (SFA) and PUFA(n-3) than the base. The presence of site- and species-specific variation in the content and composition of fatty acids reinforces the need for detailed analyses of the biochemical profile of seaweed biomass, including their extracts or purified compounds, if the focus is nutritional applications based on lipids. © 2014 Springer Science+Business Media Dordrecht

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Title: Spatial, seasonal, and within-plant variation in total fatty acid content and composition in the brown seaweeds Dictyota bartayresii and Dictyopteris australis (Dictyotales, Phaeophyceae)
Authors: B J Gosch (Author) - James Cook University
Nicholas A Paul (Author) - James Cook University
R De Nys (Author) - James Cook University
M Magnusson (Author) - James Cook University
Publication details: Journal of Applied Phycology, Vol.27(4), pp.1607-1622
Publisher: Springer Netherlands
Date published: 2015
DOI: 10.1007/s10811-014-0474-4
ISSN: 0921-8971
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99450540602621
Output Type: Journal article

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