Lipid components on the Mediterranean seagrass Posidonia oceanica
1993
Viso, A.C. | Pesando, D. | Bernard, P. | Marty, J.C.
The component fatty acids and alkanes of the seagrass Posidonia oceanica collected on the Mediterranean coasts of France and Greece are reported. Chlorophyllous and non-chlorophyllous parts of the leaves and the rhizomes were examined. Three lipid fractions were isolated, neutral lipids, glycolipids and phospholipids, and their fatty acid composition analysed. The acid 34:0 was found to be associated with neutral lipids. Posidonia oceanica is characterized by the presence of long-chain fatty acids (C22-C34) by contrast with those found in marine algae (C22-C24). The major fatty acids in the leaves are 16:0, 18:2n6 and 18:3n3, and in the rhizomes 16:0, 18:2n6 and 18:1n9. Alkanes show a predominance of odd over even numbered carbon chains together with a bimodal distribution; long-chain alkanes > C20 dominate at C23 or C21 for all parts of the seagrass and short-chain alkanes are dominated by C15 and C19 for samples from the Mediterranean French coast and by C17 and C19 for samples from Greece.
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