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NEURAL COMPETENCE AND CELL LINEAGE OF GASTRULA ECTODERM OF NEWT EMBRYO
Author(s) -
SUZUKI AKIO,
IKEDA KIYOSHI
Publication year - 1979
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1979.00175.x
Subject(s) - ectoderm , gastrulation , biology , embryo , microbiology and biotechnology , neural plate , anatomy , neural fold , population , embryogenesis , demography , sociology
The change in the capacity to form neural structures was quantitatively analyzed in both intact and isolated ectoderms of Cynops pyrrhogaster gastrula. The frequency of explants with induced neural structures abruptly decreases between stage 12c and stage 13b in intact ectoderm, and between 12 hr and 18 hr preculture in isolated ectoderm. The quantitative analysis also made clear that the size of the cell population of induced neural structures was gradually reduced with the aging of the ectoderm. The authors simultaneously examined the cell proliferation of early gastrula ectoderm and confirmed that all ectodermal cells divided at least once within 18 hr at 23°C, after which the neural competence of the ectoderm completely disappeared. The relationships between neural competence and cell lineage (cell generation) of the ectoderm are discussed in the light of these findings.