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Chemotaxonomic survey of sterols and fatty acids in six marine raphidophyte algae

journal contribution
posted on 2023-05-16, 13:53 authored by Marshall, JA, Nichols, PD, Gustaaf HallegraeffGustaaf Hallegraeff
Fatty acid and sterol profiles allowed for clear discrimination between the raphidophyte genera Chattonella, Heterosigma, Fibrocapsa and Olisthodiscus, but exhibited little differentiation for individual Chattonella species(C. marina, C. antiqua and C. subsalsa). Sterol and fatty acid profiles do not support the separation of Chattonella antiqua and C. marina as distinct species. Ecophenotypic variations in lipid profiles were also observed between Chattonella strains from different geographic locations. Sterol signatures which may be useful as chemotaxonomic markers were: the absence of C27 sterols (cholesterol and 24-dihydrozymosterol) in Heterosigma akashiwo; the presence of isofucosterol in Chattonella; and the occurrence of brassicasterol, poriferasterol and fucosterol in Olisthodiscus luteus. High levels of eicosapentaenoic acid (EPA; 17-27% of fatty acids) were present in all raphidophyte species. Lipid composition correlated more closely to recent molecular classification of raphidophytes than carotenoid pigments.

History

Publication title

Journal of Applied Phycology

Volume

14

Issue

4

Pagination

255-265

ISSN

0921-8971

Department/School

School of Natural Sciences

Publisher

Kluwer Academic Publishers

Place of publication

Netherlands

Repository Status

  • Restricted

Socio-economic Objectives

Control of pests, diseases and exotic species in coastal and estuarine environments

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