イモリ卵巣卵の表層の微細構造

概要

論文の詳細を見る
Ovarian oocytes of the newt, Triturus pyrrhogaster, were fixed in solution of osmium tetroxide containing potassium dichromate and calcium chloride and studied by electron microscopy in an effort to obtain some suggestions for a morphologic structure which might be responsible for the occurrence of a differentiated layer of peripheral cytoplasm or the cortex. The investigation demonstrated the presence of filamentous structures both within the microvilli and in the peripheral ooplasm beneath the plasma membrane of the growing oocytes. The filaments began to appear within the microvilli of oocytes with a diameter of 450μ, which extended vertically from the apex of the microvilli into the cytoplasm, and could be followed for considerable distances in the section. In oocytes measuring 600μ or more in diameter, besides the filamentous component within the microvilli above mentioned, there were found another array of filaments in the peripheral ooplasm beneath the plasma membrane. The filaments were arranged roughly in parallel to one another as well as to the surface of the oocyte. The possible significance of these observations with respect to understanding the concept of the so-called "cortex" was briefly discussed.
社団法人日本動物学会の論文
1972-06-25