Phospholipid metabolism in the brown alga, Fucus serratus |
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Authors: | Kim I Smith Roland Douce John L Harwood |
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Institution: | 1. Département de Recherche Fondamentale, C.E.A., Centre d''Etudes Nucleaires de Grenoble, F 38041, Grenoble-Cedex, France |
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Abstract: | The metabolism of phospholipids in the brown alga, Fucus serratus was studied. The major phospholipids of this alga are phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol, cardiolipin and phosphatidylcholine. When the time-course of labelling of the lipids from 32P] orthophosphate was studied, total labelling was approximately linear for 8 hr. All the major classes of phospholipid were labelled. The extent and pattern of labelling were not affected by the presence of proteins synthesis inhibitors phosphatidic acid was highly labelled at short time intervals. Phosphatidylcholine was relatively poorly labelled. The extent and pattern of labelling were not affected by the presence of protein synthesis inhibitors indicating that the enzymes involved in phospholipid synthesis have a rather slow turnover. Incorporation of radioactivity into phosphatidylglycerol was stimulated significantly by light. |
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Keywords: | Phaeophyta brown algae phospholipids metabolism |
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