Normal development and embryonic gene activity of the ascidian Herdmania momus

Degnan, B. M., Rohde, P. R. and Lavin, M. F. (1996) Normal development and embryonic gene activity of the ascidian Herdmania momus. Marine & Freshwater Research, 47 3: 543-551. doi:10.1071/MF9960543


Author Degnan, B. M.
Rohde, P. R.
Lavin, M. F.
Title Normal development and embryonic gene activity of the ascidian Herdmania momus
Journal name Marine & Freshwater Research   Check publisher's open access policy
ISSN 1323-1650
Publication date 1996-01-01
Sub-type Article (original research)
DOI 10.1071/MF9960543
Volume 47
Issue 3
Start page 543
End page 551
Total pages 11
Place of publication East Melbourne
Publisher CSIRO in cooperation with the Australian Academy of Science.
Language eng
Subject 270504 Invertebrate Biology
270299 Genetics not elsewhere classified
Abstract Embryonic and post-larval development of the tropical solitary ascidian Herdmania momus is shown to be similar to that of extensively studied ascidian model systems. H. momus development is rapid and temperature-dependent, with hatching occurring 8.5 h after fertilization at 28ºC. An increase in total embryonic gene transcription is detected at the 110-cell stage or the onset of gastrulation. Treatment of early embryos with actinomycin D inhibits transcription and curtails morphogenetic cell movement in the early gastrula without immediately inhibiting cell division. The prevalence of homeobox-containing transcripts increases around the 110-cell stage and later in development. Isolated H. momus homeobox genes, expressed at the tailbud stage, have greatest sequence identity to members of Hox, otd/Otx, eve/Evx and cad/Cdx homeobox classes. Evidence from H. momus and other ascidians suggests that urochordates possess most of the homeobox genes of the chordate HOX cluster.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Degnan Laboratory
School of Biological Sciences Publications
 
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Created: Thu, 06 Dec 2007, 00:22:44 EST by Laura McTaggart