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Neyasnye voprosy ovogeneza Hydra oligactis Obscure problems of ovogenesis in Hydra oligactis



Neyasnye voprosy ovogeneza Hydra oligactis Obscure problems of ovogenesis in Hydra oligactis



Doklady Akad Nauk Sssr 102(1): 197-200



Nutritive cells of hydra are formed in all stages of oogenesis from intensively multiplying i-cells. The process of i-cell transformation is accompanied by a decreased content of chromatin in the nuclei. From the nutritive cells, as the result of their consolidation, oocytes are formed [the author, in agreement with other investigators (P. Brien, M. Reniers-Decoen, Ann. Soc. Roy. de Belgi-que, 1951, 82,2) designates the nutritive cells as oogenia]. A few oocytes are usually formed in the large ectodermal cone. Development of oocytes proceeds by their fusion with adjacent nutritive cells, and also, apparently, at the expense of nutritive substances entering from the endoderm. Part of the nutritive cells surrounding the oocytes are converted into so-called pseudocells. It is assumed that the latter have a reserve significance. The development of the oocyte is completed by the fusion of the oocytes of a single ectodermal cone. The author considers that the processes of cell fusion, originating in the course of oogenesis of hydrida, must be looked upon as a phagocytic phenomenon.

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Neyasnye voprosy ovogeneza Hydra oligactis Obscure problems of ovogenesis in Hydra oligactis Referat Zhur, Biol, 1956, No 72470. 1955

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