5
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Variation in spiralian development: insights from polychaetes.

      1
      The International journal of developmental biology

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Spiralian development is characterized by the conservation of spindle orientation and cell geometry during early cleavage stages, as well as features of the ultimate fates of identified cells. This complex set of characters is shared by a number of animal lineages including nemerteans, polyclad platyhelminthes, annelids and mollusks. How a similar, highly stereotypical cleavage program can give rise to such diversity of larval and adult forms has intrigued researchers for many years. This review summarizes recent data from polychaete annelids, and highlights both conservation and variation in the cellular and molecular mechanisms that guide the spiral cleavage developmental program. There is a specific focus on comparisons of fate maps, patterns of cleavage, mechanisms of cell fate specification, organizing activity, and differences in molecular patterning. Some of the differences in early development represent intra-clade variation within annelids, and others hint at differences between annelids and other taxa. Because much of the classic work on spiralians has focused on mollusks, these new data from annelids have expanded our knowledge about the evolutionary flexibility in spiralian development and potentially its role in body plan evolution.

          Related collections

          Author and article information

          Journal
          Int. J. Dev. Biol.
          The International journal of developmental biology
          1696-3547
          0214-6282
          2014
          : 58
          : 6-8
          Affiliations
          [1 ] Whitney Laboratory for Marine Bioscience, University of Florida, FL, USA.
          Article
          140154es
          10.1387/ijdb.140154es
          25690962
          4fb82d15-f08a-4111-8097-352b280a6c04
          History

          Comments

          Comment on this article