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Development, Vol 113, Issue 4 1085-1091, Copyright © 1991 by Company of Biologists
JOURNAL ARTICLES |
RA Cameron, SE Fraser, RJ Britten and EH Davidson
Division of Biology, California Institute of Technology, Pasadena 91125.
This paper examines the cell lineage relationships and cell fates in embryos of the sea urchin Strongylocentrotus purpuratus leading to the various cell types derived from the definitive vegetal plate territory or the veg2 tier of cells. These cell types are gut, pigment cells, basal cells and coelomic pouches. They are cell types that constitute embryonic structures through cellular migration or rearrangement unlike the relatively non-motile ectoderm cell types. For this analysis, we use previous knowledge of lineage to assign macromeres to one of four types: VOM, the oral macromere; VAM, the aboral macromere, right and left VLM, the lateral macromeres. Each of the four macromeres contributes progeny to all of the cell types that descend from the definitive vegetal plate. Thus in the gut each macromere contributes to the esophagus, stomach and intestine, and the stripe of labeled cells descendant from a macromere reflects the re-arrangement of cells that occurs during archenteron elongation. Pigment cell contributions exhibit no consistent pattern among the four macromeres, and are haphazardly distributed throughout the ectoderm. Gut and pigment cell contributions are thus radially symmetrical. In contrast, the VOM blastomere contributes to both of the coelomic pouches while the other three macromeres contribute to only one or the other pouch. The total of the macromere contribution amounts to 60% of the cells constituting the coelomic pouches.
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C. Logan, J. Miller, M. Ferkowicz, and D. McClay Nuclear beta-catenin is required to specify vegetal cell fates in the sea urchin embryo Development, January 1, 1999; 126(2): 345 - 357. [Abstract] [PDF]
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E. Davidson, R. Cameron, and A Ransick Specification of cell fate in the sea urchin embryo: summary and some proposed mechanisms Development, January 9, 1998; 125(17): 3269 - 3290. [Abstract] [PDF]
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M. Arnone, L. Bogarad, A Collazo, C. Kirchhamer, R. Cameron, J. Rast, A Gregorians, and E. Davidson Green Fluorescent Protein in the sea urchin: new experimental approaches to transcriptional regulatory analysis in embryos and larvae Development, January 11, 1997; 124(22): 4649 - 4659. [Abstract] [PDF]
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H Benink, G Wray, and J Hardin Archenteron precursor cells can organize secondary axial structures in the sea urchin embryo Development, January 9, 1997; 124(18): 3461 - 3470. [Abstract] [PDF]
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S. Ruffins and C. Ettensohn A fate map of the vegetal plate of the sea urchin (Lytechinus variegatus) mesenchyme blastula Development, January 1, 1996; 122(1): 253 - 263. [Abstract] [PDF]
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A Ransick and E. Davidson Micromeres are required for normal vegetal plate specification in sea urchin embryos Development, January 10, 1995; 121(10): 3215 - 3222. [Abstract] [PDF]
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K Maggert, M Levine, and M Frasch The somatic-visceral subdivision of the embryonic mesoderm is initiated by dorsal gradient thresholds in Drosophila Development, January 7, 1995; 121(7): 2107 - 2116. [Abstract] [PDF]
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 A Ransick and E. Davidson A complete second gut induced by transplanted micromeres in the sea urchin embryo Science, February 19, 1993; 259(5098): 1134 - 1138. [Abstract] [PDF]
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N Armstrong, J Hardin, and D. McClay Cell-cell interactions regulate skeleton formation in the sea urchin embryo Development, January 11, 1993; 119(3): 833 - 840. [Abstract] [PDF]
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E. Davidson Later embryogenesis: regulatory circuitry in morphogenetic fields Development, January 7, 1993; 118(3): 665 - 690. [Abstract] [PDF]
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C. Ettensohn and S. Ruffins Mesodermal cell interactions in the sea urchin embryo: properties of skeletogenic secondary mesenchyme cells Development, January 4, 1993; 117(4): 1275 - 1285. [Abstract] [PDF]
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