カイガラムシの脂質に関する研究-5-ツノロウムシ1令幼虫の脂質

概要

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A great number of newly hatched larvae of C. pseudoceriferus were collected by the "Shadow box method", as the larvae are positively phototropic. The total lipids of the larvae represented about 15% of the wet weight. They were separated and characterized by using column, thin-layer and gas-liquid chromatographies together with other chemical and physical methods. It was found that the lipids consisted of more than twenty components. Triglycerides (TG) were the major components, amounting to about 64%, and phospholipids (PL) accounted for about 20%. There were also significant amounts of hydrocarbons, waxes and free fatty acids (FFA). The fatty acid compositions of TG, FFA ann PL preparations were compared. TG and FFA contained large amounts of short chain saturated fatty acids, especially capric and lauric acid. PL contained about 45% of octadecadienoic acid whereas the neutral fractions had only 2_??_6%. It is interesting to compare the lipid composition of the larvae with that of the eggs. In the larvae, the total lipids content considerably decreased, TG content also decreased, while their PL content markedly increased in comparison with the lipids of eggs. The percentage of capric acid in the total fatty acids decreased from about 40% to 18% during the hatching.
社団法人日本農芸化学会の論文