Changes in Lipid Composition in the Tail of Rana catesbeiana Larvae during Metamorphosis : Biochemistry

概要

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The composition of simple lipids and phospholipids obtained from the larval tails in Rane catesbeiana at Taylor and Kollros (TK) stage V, X, XX, XXI, and XXII-XXIII were analyzed to clarify their relationship with the regressive process of tails during metamorphosis in this frog. The weight percentage of total simple lipid to total lipid (TL) was about 33% at TK stages V and X and increased gradually to about 70% at TK stages XXII-XXIII. That of total phospholipid to TL was about 66% at TK stages V and X decreased gradually to about 28% at TK stages XXII-XXIII. The weight percentage of free fatty acid (FFA) and triglyceride (TG) to TL were about 12-15% and 4% at TK stages V and X, and increased gradually to about 38% and 13% at TK stages XXII-XXIII, respectively. Those of the other simple lipids, i.e., cholesterol and cholesterol ester did not change much during metamophosis. The weight percentage of phospholipid classes, i.e., phosphatidylethanolamine, phosphatidylcholine, phosphatidylserine, phosphatidylinositol, sphingomyelin and lysophosphatidylcholine to total phospholipid also did not significantly change throughout metamorphosis. The resulting increase in the weight percentage of total simple lipid to TL was due primarily to increase in FFA and TG during the metamorphic climax.
社団法人日本動物学会の論文
1990-06-15