Stylonychia pustulata EHRBGの分裂期に於ける大核の行動と細胞質表面構造の再構成について(其の二)

概要

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A) The writer reported that if Stylonychia is cut transversely into two halves, regeneration proceeds in anterior fragment (AF) faster than in posterior fragment (PF) in the first 4-5 hours after operation, but, as it is doubtful whether the rate of regeneration is influenced by the cytoplasmic volume of AF or PF, the writer attempted to study the effect of partial transection by means of steel needle remaining slight cytoplasmic connection on the regeneration of newly divided individuals. The results are summarized as follows: 1. Regeneration in anterior portion (AP) proceeds faster than in posterior portion (PP). 2. Regeneration processes in each portion are almost the same. The operated animals resume normal structure after two suceessive cytoplasmic divisions. B) The writer found that there occurs fusion or approachment of the central edges of macronuclei in the stage of reorganization band formation in the individuals operated by a steel needle. The fusion of macronuclei occurs in the specimens deprived of the frontal portion or in the sepcimens subjected to partial transection. The approachment of the central edges was produced by cutting off the anal region. The cytoplasmic structures are completely regenerated along with the transformation of the-macronuclei above-mentioned until the middle stage of fission.
社団法人日本動物学会の論文
1952-12-15