| Differential light intensity and spectral sensitivities of Atlantic salmon, European sea bass and Atlantic cod pineal glands ex vivo. | |
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MedLine Citation:
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PMID: 19501092 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Photoperiod is perceived by pineal photoreceptors and transduced into rhythmic melatonin signals. These rhythms can be influenced by light intensity and spectral content. In this study we compared the light sensitivity of Atlantic salmon, European sea bass and Atlantic cod by testing ex vivo the effect of different intensities and narrow bandwidth lights on nocturnal melatonin suppression by isolated pineal glands in a flow-through culture system. Using combinations of neutral density and bandpass interference filters we tested a range of light intensities (ranging from 1.22x10(13) to 3.85x10(6) photons s(-1) cm(-2)) and three wavelengths of 80 nm width (472, 555 and 661 nm corresponding to blue, green and red, respectively). Results showed clear species specific light intensity and spectral sensitivities, with cod being from 100 to 1000 times more sensitive than sea bass and salmon. Regarding the influence of spectrum, red light was less efficient on suppressing melatonin than blue and green in salmon but results were not as clear in the two other species studied. Finally, the first evidence of relative photoreception in teleosts was obtained in cod suggesting that the definition of illuminance thresholds (day/night perception) would depend on the day intensity. Indeed, a single order of magnitude increase or decrease in day intensity was shown to elicit a significant shift in the intensity response curve of night-time melatonin suppression. Taken together, this study demonstrated species specific light intensity and spectral sensitivities within temperate teleosts. |
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Authors:
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L M Vera; A Davie; J F Taylor; H Migaud |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-06-06 |
Journal Detail:
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Title: General and comparative endocrinology Volume: 165 ISSN: 1095-6840 ISO Abbreviation: Gen. Comp. Endocrinol. Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2009-11-20 Completed Date: 2010-02-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370735 Medline TA: Gen Comp Endocrinol Country: United States |
Other Details:
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Languages: eng Pagination: 25-33 Citation Subset: IM |
Affiliation:
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Institute of Aquaculture, University of Stirling, Stirling, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bass / metabolism* Gadus morhua / metabolism* Gene Expression Regulation / genetics, physiology Light* Melatonin / metabolism Photoperiod* Pineal Gland / metabolism*, radiation effects* Radioimmunoassay Salmo salar / metabolism* |
| Chemical | |
Reg. No./Substance:
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73-31-4/Melatonin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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