Scholtz G, Dohle W
Humboldt-Universität zu Berlin, Institut für Biologie, Germany.
Int J Dev Biol. 1996 Feb;40(1):211-20.
Malacostracan crustaceans undergo a complex and stereotyped cleavage pattern during formation of and segmentation in their post-naupliar germ band. This pattern has been studied in several malacostracan representatives with respect to morphogenesis and expression of the engrailed gene. Although this cell lineage pattern is specific and invariant in each species, comparative analyses reveal subtle differences between different parts of individual germ bands and between germ bands of different species. We conclude that despite the elaborate cleavage pattern, cell fate specification is not closely linked to cell lineage. Furthermore, some aspects of the evolutionary alterations of germ band formation and segmentation in annelids and arthropods are discussed.
软甲亚纲甲壳动物在无节幼体后的胚带形成和分割过程中经历复杂且刻板的卵裂模式。针对这种模式，已在几种软甲亚纲代表动物中就形态发生和 engrailed 基因的表达进行了研究。尽管这种细胞谱系模式在每个物种中都是特定且不变的，但比较分析揭示了单个胚带不同部分之间以及不同物种胚带之间的细微差异。我们得出结论，尽管有精细的卵裂模式，但细胞命运的决定与细胞谱系并没有紧密联系。此外，还讨论了环节动物和节肢动物胚带形成和分割进化改变的一些方面。
