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首页> 外文期刊>International Journal of Zoology >Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm
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Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm

机译：雏雏胚早期形成过程中的马赛克和调控现象

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摘要

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 withno 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 theblastoderm is indispensable, depending on the spatial relationship between the elementary tissues (upper layer, Rauber's sickle, endophyll).
机译：培养对称的半切开未孵化的鸡胚盘后，出现不对称的半胚（表明镶嵌发育）。在本研究中，我们观察到，长时间的培养后，进一步的不对称发育（没有可能的返回）会受到严重干扰，尤其是劳伯的镰刀依赖性现象：胃排空和缺乏心脏和血液的腔-心血管复合物的形成心包发展。相比之下，神经板对称发展。劳伯氏镰刀和邻近上层的不对称消融导致明显正常的对称胚胎发育。实际上，在未手术侧，正常的半腔心血管系统会随着单侧或双侧心管和心包的形成而发展（指示调节）。调节和镶嵌均表明在正常早期发育期间，取决于基本组织之间的空间关系（上层，Rauber镰刀，叶绿素），胚盘中央尾区中央左侧和右侧之间的相互作用是必不可少的。

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