Age-dependent changes in the content of lipids,fatty acids,and pigments in brown alga <Emphasis Type="Italic">Costaria costata</Emphasis> |
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Authors: | N I Gerasimenko N G Busarova O P Moiseenko |
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Institution: | (1) Section of Ecology, Department of Biology, University of Turku, 20014 Turku, Finland;(2) The School of Biological Sciences, University of Portsmouth, Portsmouth, UK |
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Abstract: | The contents of lipids and pigments were compared in juvenile and adult algae Costaria costata Turn.] Saund (Laminariaceae) collected in April. The total content of lipids and that of particular lipid classes increased
markedly with age. In adult algae, the contents of total lipids, glyceroglycolipids, and neutral lipids doubled as compared
with juvenile algae and was equal to 5.70, 1.78, and 0.81 mg/g fr wt, respectively. The content of free sterols increased
with age by three times; it was equal to 0.11 mg/g fr wt in juvenile algae and 0.38 mg/g fr wt in adult algae. Total content
of phospholipids changed with age to a lesser extent: 0.72 mg/g fr wt in juvenile vs. 0.92 mg/g fr wt in adult algae. Substantial
changes were observed in the content of particular polar lipids. The absolute amounts of monogalactosyldiacylglycerols, sulfoquinovosyldiacylglycerols,
digalactosyldiacylglycerols, phosphatidylcholines, phosphatidylglycerols, and phosphatidylinosites increased markedly with
age, whereas the amount of phosphatidyl-ON-(2-hydroxyethyl)glycines] declined. The amount of phosphatidylethanolamines did not depend on algal age. A small amount of
diphosphatidylglycerols was detected only in juvenile algae. The content of photosynthetic pigments (carotenoids and chlorophylls)
approximately doubled with age and, in adult algae, was equal to 0.57 and 1.23 mg/g fr wt, respectively. Total lipids of juvenile
and adult algae did not differ in fatty acid composition. At all developmental stages, polyunsaturated fatty acids predominated
early in spring and comprised about 80% of fatty acids. The acids of ω-3-series predominated among them. |
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