カイコ雌性フェロモン分泌腺中の特異的脂肪酸(Z)-11-Hexadecenoci acidの経日変化

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Daily changes in the fatty acid composition of the pheromone gland of female silkworm pupa and moth were analyzed by capillary gas chromatography. After the acid catalyzed methanolysis of the extracted lipids, six major fatty acid methyl esters, namely methyl palmitate, methyl(Z)-11-hexadecenoate, methyj stearate, methyl oleate, methyl linoleate and methyl linolenate were identified by chemical degradation and capillary GC-MS. (Z)-11-Hexadecenoic acid, which was rencently identified by the authors was a characteristic fatty acid observed only in the pheromone gland. The relative proportion of (Z)-11-hexadecenoic acid to the total amount of fatty acids in the newly appeared gland of the pupa 4 days before eclosion was 2.0%, but gradually it increased with the growth of the gland and reached 9.3% on one day before eclosion. After eclosion the amount decreased gradually. The amount of palmitic acid decreased gradually with the growth of pupa whereas the total amount of (Z)-11-hexadecenoic acid and palmitic acid remained constant. These results suggest a possible biosynthesis route of Bombykol from palmitic acid via(Z)-11-hexadecenoic acid.
1982-05-25