Cytological and microspectrophotometric analysis of mesodermalized explants of Triturus gastrula ectoderm.

摘要: Using isolated presumptive ectoderm of the newt ( Triturus pyrrhogaster ) embryos as a reactor and extract rat bone marrow mesodermal inductor, changes cell number mitotic index cells were studied. In early stages cultivation increase in mesodermalized ectodermal piece was slower than non-mesodermalized epidermal piece; but after 24 h it showed abrupt reached population equal to that control at 48 cultivation. experimental series, 0 4 application inducing stimulus, increased precipitously next 8 level 4·4% 12 thereafter decreased gradually. The cycle stopped S phase stayed for several hours inductor. A sudden fall number, observed between 4th 8th seems be attributable death which brought about by stimulus. histogenetic process phases repression on mitosis an proliferation nonproliferation seem succeed each other.