Ultrastructure and Secretory Mechanism of the Alluring Gland Cell in the Silkworm, Bombyx mori L. (Lepidoptera : Bombycidae)

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The ultrastrucutre of the alluring gland cell of the female silkworm, an organ secreting the sex attractant, was examined electron-microscopically with special regard to the mechanism of the production and secretion of the lipoid substance which is the carrier of the pheromone. It is concluded that the lipoid substance is originated from characteristic myelin figures appearing in the pupal cell, while the mitochondria are the starting organelle of such myelin figures. The lipoid substance is then released into the cuticle through the plasma membrane of the microvilli arraying the cell surface, and then finally transported to the outside via pore canals, characteristic to the cuticle of the gland.
1969-09-25