Cameron, R. Andrew and Holland, Nicholas D. (1983) Electron microscopy of extracellular materials during the development of a sea star, Patiria miniata (Echinodermata: Asteroidea). Cell and Tissue Research, 234 (1). pp. 193-200. ISSN 0302-766X http://resolver.caltech.edu/CaltechAUTHORS:20121023-093158707
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The fine structure of conspicuous extracellular materials during the life history of a sea star (Patiria miniata) is described. The outer surface of the developing sea star is covered by two morphologically different cuticles that appear sequentially during ontogeny. The primary cuticle, which is about 120 nm thick and two-layered, is present from mid-blastula through the end of the larval stage. The secondary cuticle, which is about 1 µm thick and three-layered, first appears on the epidermis of the rudiment region of the larva and, after metamorphosis, covers the entire epidermis of the juvenile and adult stages. During ontogeny, there are only two conspicuous gut cuticles: the first lines the newly invaginated archenteron at the start of the gastrula stage, and the second lines the esophagus during the larval stage. A blastocoelic basal lamina first appears at mid-blastula and persists as subectodermal and subendodermal basal laminae. Ruthenium red-positive granules are detectable between the lateral surfaces of adjacent ectodermal cells during part of the gastrula stage; this transient intercellular material may possibly aid in lateral adhesion between cells.
|Additional Information:||© 1983 Springer-Verlag. Accepted June 20, 1983. Supported in part by USPHS Grant No. R-07011 (1980–1981). The manuscript was critically read by LZ Holland and CA LaHaye.|
|Subject Keywords:||Sea star; Development; Cuticle; Extracellular materials; Ultrastructure|
|Official Citation:||Cameron, R. A. and N. D. Holland (1983). "Electron microscopy of extracellular materials during the development of a sea star, Patiria miniata (Echinodermata: Asteroidea)." Cell and Tissue Research 234(1): 193-200.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||24 Oct 2012 18:54|
|Last Modified:||24 Oct 2012 18:54|
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