Gastrulation in the spider Zygiella x-notata involves three distinct phases of cell internalization
Gastrulation in the spider Zygiella x-notata involves three distinct phases of cell internalization
复制标题
DOI：
10.1002/dvdy.21371
复制
发表时间：
2007-12-01
影响因子：
2.5
通讯作者：
Black, Steven D.
中科院分区：
文献类型：
--
作者：
Chaw, R. Crystal;Vance, Emily;Black, Steven D.
利用延时录像、细胞示踪和改进的组织学方法，分析了蜘蛛Zygiella x-notata胚胎原肠胚的细胞运动。细胞在胚盘中心附近分三个不同的阶段内化。首先，卵丘间充质细胞作为一组细胞在浅层下方进入和迁移。其次，通过胚孔的大量内化产生了一个扩散的有组织的深层。第三，表面细胞在胚盘中心聚集，形成尾芽。地板内化，尾芽在新生的背侧区域上移动，形成尾叶。这种原肠模式不同于历史文献中描述的典型模式：(1)在任何其他细胞内化之前，Z.x-notata的积云已经完全形成；(2)尾叶是通过尾芽形成的，尾芽是细胞内化的一个轨迹。
The cell movements of gastrulation were analyzed in embryos of the spider Zygiella x-notata, using time-lapse video, cell tracing, and improved histology. Cells are internalized near the center of the germ disc in three distinct phases. First, cumulus mesenchyme cells ingress and migrate as a group beneath the superficial layer. Second, mass internalization through a blastopore yields a diffusely organized deep layer. Third, superficial cells accumulate at the center of the germ disc to form the caudal bud. The floor is internalized, and the caudal bud moves over the nascent dorsal field to form the caudal lobe. This pattern of gastrulation differs from the canonical pattern described in the historical literature: (1) the cumulus of Z. x-notata is completely formed before any other cells internalize; and (2) the caudal lobe is formed by means of the caudal bud, which is a locus of cell internalization.