Gastrulation pp 305-311 | Cite as

Cell-Extracellular Matrix Interactions During Primary Mesenchyme Formation in the Sea Urchin Embryo

  • Michael Solursh
  • Mary Constance Lane
Part of the Bodega Marine Laboratory Marine Science Series book series (BMSS)


Gastrulation in different organisms can involve distinct morphogenetic mechanisms, at least at the cellular level. In the sea urchin, two distinct periods of gastrulation are observed (Solursh 1986). One involves the formation of the primary mesenchyme cells, which give rise to the larval skeleton, and the other involves the formation of the archenteron. Each of these illustrate different sorts of cellular activities. The formation of the primary mesenchyme involves an epithelial-mesenchymal transition followed by the apparently random migration of individual mesenchymal cells in the blastocoel until they form two ventral-lateral clumps connected by a ring of cells. The formation of the archenteron involves the infolding of cells at the vegetal plate followed by cellular rearrangements as the archenteron elongates (see chapter by McClay).


Sulfate Proteoglycan Primitive Streak Sulfate Deprivation Proteoglycan Core Protein Urea Extract 


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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Michael Solursh
    • 1
  • Mary Constance Lane
    • 1
  1. 1.Department of BiologyUniversity of IowaIowa CityUSA

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