シラウオの孵化腺

概要

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1. In embryos shortly before hatching, 300 to 400 unicellular glands, filled with secretory granules, are present along the median dorsal line between the nasal pits and the posterior end of the trunk. After finished discharging the secretory granules before hatching, the glands degenerate in a few days. 2. When placed together with early embryos in a watch glass containing a small quantity of water, the anterior parts of the body bearing glands filled with secretory granules dissolve locally the egg membranes surrounding early embryos. But those after discharging the granules and the posterior parts of the body without glands fail to do so. 3. The glands are derived from the epidermal cells on the lateral sides of embryonic body, and migrate to the dorsal side. The glands are analogous to the hatching glands of amphibians which are derived from the neural crests (mesectoderm).
社団法人日本動物学会の論文
1953-01-15