The embryonic ciliated band of the sea urchin, Strongylocentrotus purpuratus derives from both oral and aboral ectoderm.

Abstract:

:The ciliated band of the Strongylocentrotus purpuratus embryo consists of a columnar epithelium, 3-5 cells wide, which gives rise to a small number of neuroblasts. It arises late in development, as a border separating the squamous epithelial cells of the oral and aboral ectoderm. To determine the lineage origins of this structure, we performed double labeling experiments at the 2-cell stage and the 16-cell stage, which were designed to reveal clonal boundaries in the ciliated band. The ciliated band forms in a region of the ectoderm derived from descendants of the following blastomeres: No, VO, Na1u, Na2u, right and left NL1u, and right and left NL2u. In contrast to the lineage contributions of the embryonic territories established early in development, lineage origins of the ciliated band are variable. Specification of the ciliated band thus depends on intercellular interaction rather than lineage.

journal_name

Dev Biol

journal_title

Developmental biology

authors

Cameron RA,Britten RJ,Davidson EH

doi

10.1006/dbio.1993.1313

subject

Has Abstract

pub_date

1993-12-01 00:00:00

pages

369-76

issue

2

eissn

0012-1606

issn

1095-564X

pii

S0012-1606(83)71313-8

journal_volume

160

pub_type

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