Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm

After culturing symmetrically hemisectioned unincubated chicken blastoderms, asymmetric hemiembryos developed (indicating mosaic development). In the present study, we observed that after prolonged culture, the further asymmetric development (way with no possible return) becomes profoundly disturbed...

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Main Authors: Marc Callebaut, Emmy Van Nueten, Fernand Harrisson, Guy Hubens
Format: Article
Language:English
Published: Wiley 2010-01-01
Series:International Journal of Zoology
Online Access:http://dx.doi.org/10.1155/2010/572502
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author Marc Callebaut
Emmy Van Nueten
Fernand Harrisson
Guy Hubens
author_facet Marc Callebaut
Emmy Van Nueten
Fernand Harrisson
Guy Hubens
author_sort Marc Callebaut
collection DOAJ
description After culturing symmetrically hemisectioned unincubated chicken blastoderms, asymmetric hemiembryos developed (indicating mosaic development). In the present study, we observed that after prolonged culture, the further asymmetric development (way with no possible return) becomes profoundly disturbed, more particularly the Rauber's sickle-dependent phenomena: gastrulation and the formation of the coelomo-cardiovascular complex with absence of heart and pericard development. By contrast, the neural plate develops symmetrically. Asymmetrical ablation of Rauber's sickle and the neighboring upper layer results in the development of an apparently normal symmetrical embryo. Indeed, at the unoperated side, a normal half coelomo-cardiovascular system develops with a unilateral or bilateral heart tube and pericard formation (indicating regulation). Both regulation and mosaicism indicate that during normal early development, the interaction between the left and right sides of the caudal area centralis of the blastoderm is indispensable, depending on the spatial relationship between the elementary tissues (upper layer, Rauber's sickle, endophyll).
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spelling doaj-art-57252b70d2954454acfe915f7a4325632025-02-03T05:51:17ZengWileyInternational Journal of Zoology1687-84771687-84852010-01-01201010.1155/2010/572502572502Mosaic and Regulation Phenomena during the Early Formation of the Chick BlastodermMarc Callebaut0Emmy Van Nueten1Fernand Harrisson2Guy Hubens3Laboratory of Human Anatomy and Embryology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, BelgiumLaboratory of Human Anatomy and Embryology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, BelgiumLaboratory of Human Anatomy and Embryology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, BelgiumLaboratory of Human Anatomy and Embryology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, BelgiumAfter culturing symmetrically hemisectioned unincubated chicken blastoderms, asymmetric hemiembryos developed (indicating mosaic development). In the present study, we observed that after prolonged culture, the further asymmetric development (way with no possible return) becomes profoundly disturbed, more particularly the Rauber's sickle-dependent phenomena: gastrulation and the formation of the coelomo-cardiovascular complex with absence of heart and pericard development. By contrast, the neural plate develops symmetrically. Asymmetrical ablation of Rauber's sickle and the neighboring upper layer results in the development of an apparently normal symmetrical embryo. Indeed, at the unoperated side, a normal half coelomo-cardiovascular system develops with a unilateral or bilateral heart tube and pericard formation (indicating regulation). Both regulation and mosaicism indicate that during normal early development, the interaction between the left and right sides of the caudal area centralis of the blastoderm is indispensable, depending on the spatial relationship between the elementary tissues (upper layer, Rauber's sickle, endophyll).http://dx.doi.org/10.1155/2010/572502
spellingShingle Marc Callebaut
Emmy Van Nueten
Fernand Harrisson
Guy Hubens
Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm
International Journal of Zoology
title Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm
title_full Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm
title_fullStr Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm
title_full_unstemmed Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm
title_short Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm
title_sort mosaic and regulation phenomena during the early formation of the chick blastoderm
url http://dx.doi.org/10.1155/2010/572502
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AT guyhubens mosaicandregulationphenomenaduringtheearlyformationofthechickblastoderm