エクジステロンによって誘導されたザリガニY腺細胞微細構造の変化

概要

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Recently some steroids which possess high molting hormone activities for Arthropods have been isolated from plant sources. In the present work, one of the steroids, ecdysterone, was injected into adult crayfish and the Y gland cells were examined by light and electron microscopes. Since the Y glands have been considered as the source of the molting hormone, the excess amount of the exogeneous molt-accerelating steroid was expected to cause some changes of the Y gland cells themselves. In the Y gland cells of normal animals, it was hard to encounter well configurated granular endoplasmic reticulum. While in the animals treated with ecdysterone, numerous large granules appeared in the cytoplasm arranging in rows. Rows of granules were accompanied by a membrane system. Granules ranged from 500 to 750Å in diameter, so that it seemed unlikely that they were identical with the ordinary ribosomes of 100 to 150Å in diameter. A ribonuclease treatment, however, completely digested the granules, indicating that they were rich in RNA. An addition of ecdysterone into an in vitro culture of Y glands also induced the appearance of giant granules in the cytoplasm.
社団法人日本動物学会の論文
1970-05-15