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Fate mapping study of the endoderm in the posterior part of the 1.5‐day‐old chick embryo
Author(s) -
Matsushita Susumu
Publication year - 1999
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 - 10.1046/j.1440-169x.1999.413430.x
Subject(s) - endoderm , embryo , biology , anatomy , microbiology and biotechnology , embryonic stem cell , genetics , gene
Various endodermal sites posterior to the caudal‐most somite were marked in ovo with the vital dye DiI, and the fate of marked endoderm was analyzed after 2 or 3 days’ reincubation. The endoderm in this area became gut epithelium posterior to the caudal jejunum and yolk sac. The area occupied by the cells that were to contribute to the dorsal part of the digestive tube lay centrally around the area overlaid by axial and paraxial mesoderm, with the preventral digestive area lying outside with considerable overlapping, which was surrounded by the preyolk sac area. During the formation of the posterior digestive tube, the endoderm was elongated anteroposteriorly to a considerable degree. Cells that contributed to the cloaca and those that produced descendants in the large intestine occupied similar areas posterior to the center of the sinus rhomboidalis, which were included in the pre‐ileal area extending more anteriorly. Prejejunal cells generally localized in a more anterior position than pre‐ileal cells. Pre‐allantoic cells were located in a rather small area around the posterior primitive streak.