Epithelial type, ingression, blastopore architecture and the evolution of chordate mesoderm morphogenesis.
Epithelial type, ingression, blastopore architecture and the evolution of chordate mesoderm morphogenesis.
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上皮类型、侵入、胚孔结构和脊索动物中胚层形态发生的进化。
DOI：
10.1002/jez.b.21198
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Keller,Ray
中科院分区：
文献类型：
--
作者：
Shook,DavidR;Keller,Ray
脊索动物胚胎显示出一种进化趋势的机制，他们用来内化假定的中胚层，主要依赖于内陷在基底脊索动物，不同的组合的退化和内陷在脊椎动物和爬行动物，主要是在鸟类和哺乳动物的内陷。这种趋势与上皮类型的变化和胚胎结构的变化以及胚胎形成的囊胚孔类型的变化有关。我们还注意到令人惊讶的保护退化，在原肠胚形成期间，至少一个子集的脊索细胞在整个脊索动物，并建议，这表明一个约束形态发生进化的基础上的建筑和图案之间的功能联系。最后，我们提出了一个模型，从原肠胚形成通过有尾目两栖类类型的囊胚到原肠胚形成通过原始条纹，在鸡或小鼠。Zool.（Mol. Dev. Evol.）310 B：85-110，2008年。© 2007 Wiley利斯公司
Chordate embryos show an evolutionary trend in the mechanisms they use to internalize presumptive mesoderm, relying predominantly on invagination in the basal chordates, varying combinations of involution and ingression in the anamniote vertebrates and reptiles, and predominantly on ingression in birds and mammals. This trend is associated with variations in epithelial type and changes in embryonic architecture as well as variations in the type of blastopore formed by an embryo. We also note the surprising conservation of the involution, during gastrulation, of at least a subset of the notochordal cells throughout the chordates, and suggest that this indicates a constraint on morphogenic evolution based on a functional linkage between architecture and patterning. Finally, we propose a model for the evolutionary transitions from gastrulation through a urodele amphibian‐type blastopore to gastrulation through a primitive streak, as in chick or mouse.J. Exp. Zool. (Mol. Dev. Evol.) 310B:85–110, 2008. © 2007 Wiley‐Liss, Inc.