| Review of larval and postlarval eye ultrastructure in the lamprey (Cyclostomata) with special emphasis on Geotria australis (Gray). | |
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MedLine Citation:
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PMID: 9016447 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The literature dealing with the lateral eye in lampreys is briefly reviewed here. While there appears to be no longer much doubt that the short and long photoreceptor cells in the lamprey eye correspond to rods and cones, questions of dark/light adaptational changes, the nature of visual pigments, and the roles of retinal serotonin and melatonin need to be re-addressed. Eyes of the larval and postlarval ("macrophthalmia") stages of the lamprey Geotria australis were examined by electron microscopy and it was found that the larval retina is largely undifferentiated except for a small central zone surrounding the optic nerve head. The retina of the postlarval stage is fully differentiated and the photoreceptor outer segments undergo renewal, which appears to involve the retinal pigment epithelium (RPE). The distribution of larval RPE and choroidal pigments, postlarval ganglion cells, and the orientation of scleral collagen are unusual for vertebrates. No obvious positional or size differences of any retinal cell type were apparent between day- and night-fixed specimens. |
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Authors:
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V B Meyer-Rochow; D Stewart |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Microscopy research and technique Volume: 35 ISSN: 1059-910X ISO Abbreviation: Microsc. Res. Tech. Publication Date: 1996 Dec |
Date Detail:
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Created Date: 1997-02-27 Completed Date: 1997-02-27 Revised Date: 2005-11-16 |
Medline Journal Info:
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Nlm Unique ID: 9203012 Medline TA: Microsc Res Tech Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 431-44 Citation Subset: IM |
Affiliation:
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Department of Biology (Section Animal Physiology), University of Oulu, (Linnanmaa), Finland. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Eye / ultrastructure* Lampreys / anatomy & histology* Larva / ultrastructure Microscopy, Electron |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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