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Published on: August 28, 2018
Sterols and Fatty Acids of the Harmful Dinoflagellate Cochlodinium polykrikoides
José-Luis Giner1, Harriette Ceballos2, Ying-Zhong Tang3,4
1Department of Chemistry, State University of New York - ESF, Syracuse NY 13210, USA, (phone: +1-315-470-6895; fax: +1-315-470-6856). jlginer@syr.edu.
Abstract:
Sterol and fatty acid compositions were determined for Cochlodinium polykrikoides, a toxic, bloom-forming dinoflagellate of global significance. The major sterols were dinosterol (40% of total sterols), dihydrodinosterol (32%), and the rare 4α-methyl Δ(8(14)) sterol, amphisterol (23%). A minor sterol, 4α-methylergost-24(28)-enol was also detected (5.0%). The fatty acids had a high proportion of PUFAs (47%), consisting mainly of EPA (20%) and the relatively uncommon octadecapentaenoic acid (18 : 5, 22%). While unlikely to be responsible for toxicity to fish, these lipids may contribute to the deleterious effects of this alga to invertebrates.
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