Neuroectodermal and endodermal expression of the ascidian Cdx gene is separated by metamorphosis.
In: Development Genes & Evolution, Jg. 210 (2000-04-01), Heft 4, S. 212-216
Online
academicJournal
Zugriff:
Ascidians are a group of invertebrate chordates that exhibit a biphasic life history, with chordate-specific structures developing during embryogenesis (dorsal neural tube and notochord) and metamorphosis (pharyngeal gill slits and endostyle). Here we characterize the expression of a caudal/Cdx gene homologue, Hec-Cdx, from the ascidian Herdmania curvata. Vertebrate Cdx genes are expressed at gastrulation and in the posterior of the developing neural tube and endoderm. Hec-Cdx expression is initiated at the earliest stages of gastrulation, with peaks in RNA abundance occurring first during neurulation and tailbud extension and then in 3- to 5-day-old juveniles. Hec-Cdx is expressed in a pair of cells in the anterior lip of the blastopore in the late gastrula which form the most posterior portion of the neural plate. During tailbud formation expression is maintained in and solely restricted to these cells. During metamorphosis expression is localized to the intestine of the juvenile. These data, along with data for the H. curvata Otx gene, suggest that the evolution of the novel ascidian biphasic body plan was not accompanied by a deployment of these genes into new pathways but by a temporal separation of tissue-specific expression. [ABSTRACT FROM AUTHOR]
Copyright of Development Genes & Evolution is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
Neuroectodermal and endodermal expression of the ascidian Cdx gene is separated by metamorphosis.
|
---|---|
Autor/in / Beteiligte Person: | Hinman, Veronica F. ; Becker, Erika ; Degnan, Bernard M. |
Link: | |
Zeitschrift: | Development Genes & Evolution, Jg. 210 (2000-04-01), Heft 4, S. 212-216 |
Veröffentlichung: | 2000 |
Medientyp: | academicJournal |
ISSN: | 0949-944X (print) |
DOI: | 10.1007/s004270050306 |
Schlagwort: |
|
Sonstiges: |
|