コイの孵化腺果粒の染色性

概要

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1. In carp embryos (Cyprinus carpio), anlage cells of the hatching gland appear with a cuneiform through thickening of the epithelium at the lower marginof the optic versicle on both side of the head, at the optic vesicle stage. 2. In the course of the embryonal development, the hatching gland cells begin to migrate ventrally in a group from the site of their origin, grandually extending their range of distribution. Then they are scattered over the epithelium of the whole yolk sac. According to the formation of eye pigments, the cells migrate dorsally towards the head. The distribution of the hatching gland cells in fully grown embryos covers the head except its top and the yolk sac. The number of the hatching gland cells measures about 1,400 in total. Each of the haching gland cells in oval in shape, and measures about 18μ in length and 12μ in width. Thereare approximately 35 secretion granules in each cell, each granule being 2μ indiameter. 3. The hatching gland cells attain their maximum development 10 to 20hours before hatching. Within about 12 hours after hatching, they undergo a rapid degeneration. 4. The affinity to dyes of the secretion granules of each hatching gland cell undergoes three changes in the course of the differentiation and development of the hatching gland cells.
社団法人日本動物学会の論文
1961-10-15