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Variation in the lipid composition of the marine red alga Gracilaria verrucosa at different developmental stages was examined. Shoots, juveniles and mature tetrasporophytes, male and female gametophytes had similar qualitative lipid composition (glycolipids, phospholipids and neutral lipids). However, the ratio of these lipid groups and the content of individual lipid components depended on the developmental stage. Phospholipids were the main lipid group in shoots, due to the highest concentration of phosphatidylcholine. Glycolipids predominated in juvenile thalli as well as in tetrasporophytes, and male and female gametophytes. The content of storage lipids, i.e., triacylglycerols was 2–3 times lower in shoots and young algae compared to mature thalli. Comparison of these results with the literature on G. verrucosa thallus ultrastructure suggests that differences in lipid ratio are related to the formation and the structural alteration of cells or photosynthetic apparatus.
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S. V. Khotimchenko (2006) studied this question.
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