Set-aside cells in maximal indirect development: Evolutionary and developmental significance
Set-aside cells in maximal indirect development: Evolutionary and developmental significance
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DOI：
10.1002/bies.950190713
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发表时间：
1997-07-01
期刊：
影响因子：
4
通讯作者：
Davidson, EH
中科院分区：
文献类型：
--
作者：
Peterson, KJ;Cameron, RA;Davidson, EH
在海洋无脊椎动物的许多分类群中发现的间接发育的最大形式中，具有固定命运和有限分裂能力的胚胎细胞谱系产生幼虫结构。成虫起源于幼虫中的保留细胞，这些细胞是从早期胚胎特化过程中保留下来的，并且保留了广泛的增殖能力。我们审查的位置和命运的预留细胞在两个原口类，lophophorate和后口类。许多门的不同的成体身体平面是从同源幼虫内的同源预留细胞发育而来的。我们认为，股票从这些门出现利用这些各自的幼虫，其成年人的身体计划的多样性反映了不同的模式形成过程中执行的预留细胞群。脊索动物和节肢动物直接发育，但与间接发育的门共享成年特征。因此，后口类和原口类股票的祖先脊索动物和节肢动物，分别也利用最大的间接发展。
In the maximal form of indirect development found in many taxa of marine invertebrates, embryonic cell lineages of fixed fate and limited division capacity give rise to the larval structures. The adult arises from set-aside cells in the larva that are held out from the early embryonic specification processes, and that retain extensive proliferative capacity. We review the locations and fates of set-aside cells in two protostomes, a lophophorate and a deuterostome. The distinct adult body plans of many phyla develop from homologous set-aside cells within homologous larvae. We argue that the stocks from which these phyla arose utilized these respective larvae, and the diversity of their adult body plans reflects diverse pattern formation processes executed in their set-aside cell populations. Chordates and arthropods develop directly, but share adult characters with indirectly developing phyla. Thus the deuterostome and protostome stocks that were ancestral to chordates and arthropods, respectively, also utilized maximal indirect development.