サケ卵における精子進入と付活の独立性

概要

論文の詳細を見る
In order to see why eggs of the salmon (Oncorhynchus keta) do not initiate development in Ringer's solution even after sperm-entry, inseminated eggs were stimulated by treatment with various parthenogenetic agents. The egg thus treated initiated development wighout breakdown of cortical alveoli when nearly the whole egg surface was directly affected. The effective methods are; (1) immersion in acidulated Ringer's solution, in ZnSO_4-Ringer's solution, or in isotonic CaCl_2 solution, (2) stimulation by direct electric current, and (3) irradiation by ordinary light after vital staining with rhodamine B. The egg did not react to pricking with a steel needle which is a local stimulation. When water touched the egg on a small restricted area of the surface, blastodisc formation did not occur though the cortical alveoli were broken down on the affected surface. The development was induced by contact of the animal half of the egg with water. If contact with water was restricted to only the vegetal half, no eggs showed blastodisc formation.
社団法人日本動物学会の論文
1966-10-15