spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Helvik, J. V.
Right arrow Articles by Seo, H.-C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Helvik, J. V.
Right arrow Articles by Seo, H.-C.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?
The Journal of Experimental Biology 204, 2553-2559 (2001)
© 2001 The Company of Biologists Limited

Review

Topography of different photoreceptor cell types in the larval retina of Atlantic halibut (Hippoglossus hippoglossus)

Jon Vidar Helvik1,*, Øyvind Drivenes1, Torstein Harboe2 and Hee-Chan Seo1,{ddagger}

1 Department of Molecular Biology, University of Bergen, PO Box 7800, N-5020 Bergen, Norway and
2 Institute of Marine Research, Austevoll Aquaculture Research Station, N-5392 Storebø, Norway
{ddagger} Present address: Sars Centre for Molecular Marine Biology, Thormøhlensgt. 55, N-5008 Bergen, Norway

*Author for correspondence (e-mail: Vidar.Helvik{at}mbi.uib.no)

Accepted April 19, 2001

The identities of single cone cells in the retina of Atlantic halibut (Hippoglossus hippoglossus) larvae were studied by in situ hybridisation using RNA probes for the five different halibut opsins. Four different cone opsins (ultraviolet-, blue-, green- and red-sensitive) are expressed in Atlantic halibut at the end of the yolk-sac period, whereas rod opsin is expressed later in development. Photoreceptor cells expressing ultraviolet-sensitive opsin are found only in the ventral retina, presumably to optimise detection of the downwelling ultraviolet light. The majority of the photoreceptors (approximately 90%) in the retina express green-sensitive opsin and its distribution shows no regional differences. In contrast, blue- and red-sensitive opsins are expressed much less frequently (in approximately 10% of photoreceptors), although these two opsins are also found over the entire retina. The expression patterns of the different visual pigments indicate some form of mosaic expression in the single-coned larval retina, and this is reminiscent of the square mosaic expression found in post-metamorphic Atlantic halibut. These findings suggest plasticity in green-opsin-expressing cells during development, resulting in a square mosaic expression pattern.

Key words: opsin, cone, rod, mosaic, photoreceptor, flatfish, Hippoglossus hippoglossus.


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
J. Shand, N. S. Hart, N. Thomas, and J. C. Partridge
Developmental changes in the cone visual pigments of black bream Acanthopagrus butcheri
J. Exp. Biol., December 1, 2002; 205(23): 3661 - 3667.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 2001