Responses of pineal photoreceptors in the brook and rainbow trout
Identifieur interne : 001D37 ( Main/Exploration ); précédent : 001D36; suivant : 001D38Responses of pineal photoreceptors in the brook and rainbow trout
Auteurs : Y. Omura [Canada] ; A. Ali [Canada]Source :
- Cell and Tissue Research [ 0302-766X ] ; 1980-05-01.
English descriptors
- KwdEn :
Abstract
Summary: Electron microscopy of the pineal receptor cells in light- and dark-adapted brook trout, Salvelinus fontinalis and the rainbow trout, Salmo gairdneri, revealed no significant differences in the tubular and filamentous elements of the inner segment, neck and supranuclear regions. However, changes in synaptic relations between the photoreceptor and nerve cell were induced by light and darkness. In the light-adapted state, the synaptic relationship between axon terminals and photoreceptor basal processes predominates, while in darkness the synapses between photoreceptor basal processes and ganglion cell dendrites are more prominent. Further, in darkness, the photoreceptor basal processes show a number of synaptic vesicles and synaptic ribbons. These findings suggest that the sensory function of the fish pineal is enhanced during darkness but inhibited by light, and that the synaptic relationships are involved in the control of sensory activity in the pineal photoreceptor and ganglion cells. These results corroborate those of electrophysiological studies in that the maximal spontaneous discharge frequency of the ganglion cells occurs in the dark, and it also shows a burst when light is removed. The “typical” chemical synapse between the axon terminal and the photoreceptor basal process in light seems to function as an inhibitor.
Url:
DOI: 10.1007/BF00234177
Affiliations:
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Ali</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:DAD37E3AF5513B8DB8C637A700FC8E58CFD27AAA</idno><date when="1980" year="1980">1980</date><idno type="doi">10.1007/BF00234177</idno><idno type="url">https://api.istex.fr/document/DAD37E3AF5513B8DB8C637A700FC8E58CFD27AAA/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001514</idno><idno type="wicri:Area/Istex/Curation">001514</idno><idno type="wicri:Area/Istex/Checkpoint">001812</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">001812</idno><idno type="wicri:doubleKey">0302-766X:1980:Omura Y:responses:of:pineal</idno><idno type="wicri:Area/Main/Merge">001E53</idno><idno type="wicri:Area/Main/Curation">001D37</idno><idno type="wicri:Area/Main/Exploration">001D37</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Responses of pineal photoreceptors in the brook and rainbow trout</title><author><name sortKey="Omura, Y" sort="Omura, Y" uniqKey="Omura Y" first="Y." last="Omura">Y. Omura</name><affiliation wicri:level="3"><country xml:lang="fr">Canada</country><wicri:regionArea>Département de Biologie, Université de Montréal, Station “A”, Case postale 6128, H3C 3J7, Montréal</wicri:regionArea><placeName><settlement type="city">Montréal</settlement><region type="state">Québec</region></placeName></affiliation></author><author><name sortKey="Ali, A" sort="Ali, A" uniqKey="Ali A" first="A." last="Ali">A. Ali</name><affiliation wicri:level="3"><country xml:lang="fr">Canada</country><wicri:regionArea>Département de Biologie, Université de Montréal, Station “A”, Case postale 6128, H3C 3J7, Montréal</wicri:regionArea><placeName><settlement type="city">Montréal</settlement><region type="state">Québec</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Cell and Tissue Research</title><title level="j" type="abbrev">Cell Tissue Res.</title><idno type="ISSN">0302-766X</idno><idno type="eISSN">1432-0878</idno><imprint><publisher>Springer-Verlag</publisher><pubPlace>Berlin/Heidelberg</pubPlace><date type="published" when="1980-05-01">1980-05-01</date><biblScope unit="volume">208</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="111">111</biblScope><biblScope unit="page" to="122">122</biblScope></imprint><idno type="ISSN">0302-766X</idno></series><idno type="istex">DAD37E3AF5513B8DB8C637A700FC8E58CFD27AAA</idno><idno type="DOI">10.1007/BF00234177</idno><idno type="ArticleID">Art10</idno><idno type="ArticleID">BF00234177</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0302-766X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Brook and rainbow trout</term><term>Pineal photoreceptor</term><term>Response to light and darkness</term><term>Synaptic correlations</term><term>Synaptic ribbons</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Summary: Electron microscopy of the pineal receptor cells in light- and dark-adapted brook trout, Salvelinus fontinalis and the rainbow trout, Salmo gairdneri, revealed no significant differences in the tubular and filamentous elements of the inner segment, neck and supranuclear regions. However, changes in synaptic relations between the photoreceptor and nerve cell were induced by light and darkness. In the light-adapted state, the synaptic relationship between axon terminals and photoreceptor basal processes predominates, while in darkness the synapses between photoreceptor basal processes and ganglion cell dendrites are more prominent. Further, in darkness, the photoreceptor basal processes show a number of synaptic vesicles and synaptic ribbons. These findings suggest that the sensory function of the fish pineal is enhanced during darkness but inhibited by light, and that the synaptic relationships are involved in the control of sensory activity in the pineal photoreceptor and ganglion cells. These results corroborate those of electrophysiological studies in that the maximal spontaneous discharge frequency of the ganglion cells occurs in the dark, and it also shows a burst when light is removed. The “typical” chemical synapse between the axon terminal and the photoreceptor basal process in light seems to function as an inhibitor.</div></front></TEI><affiliations><list><country><li>Canada</li></country><region><li>Québec</li></region><settlement><li>Montréal</li></settlement></list><tree><country name="Canada"><region name="Québec"><name sortKey="Omura, Y" sort="Omura, Y" uniqKey="Omura Y" first="Y." last="Omura">Y. Omura</name></region><name sortKey="Ali, A" sort="Ali, A" uniqKey="Ali A" first="A." last="Ali">A. Ali</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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