Photoreceptors and visual pigments in the retina of the fully anadromous green sturgeon (Acipenser medirostrus) and the potamodromous pallid sturgeon (Scaphirhynchus albus).
Identifieur interne : 000E15 ( Main/Merge ); précédent : 000E14; suivant : 000E16Photoreceptors and visual pigments in the retina of the fully anadromous green sturgeon (Acipenser medirostrus) and the potamodromous pallid sturgeon (Scaphirhynchus albus).
Auteurs : Arnold J. Sillman [États-Unis] ; Allicia K. Beach ; David A. Dahlin ; Ellis R. LoewSource :
- Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology [ 0340-7594 ] ; 2005.
English descriptors
- KwdEn :
- MESH :
- chemical , physiology : Retinal Pigments.
- cytology : Retina.
- metabolism : Retina.
- methods : Microscopy, Electron, Scanning, Microspectrophotometry.
- physiology : Photoreceptor Cells.
- ultrastructure : Photoreceptor Cells.
- Animals, Fishes.
Abstract
Green sturgeon and pallid sturgeon photoreceptors were studied with scanning electron microscopy (SEM), microspectrophotometry and, in the case of the green sturgeon, retinal whole-mounts. The retinas of both species contain both rods and cones: cones comprise between 23% (whole-mount) and 36% (SEM) of the photoreceptors. The cone population of both species is dominated by large single cones, but a rare small single cone is also present. In both species, most rods have long outer segments of large diameter. A rod with a relatively thin outer segment is present in the pallid sturgeon retina. Mean cone packing density for the entire green sturgeon retina is 4,690+/-891 cones/mm2, with the dorsal retina 14% more dense than the ventral. There is evidence for a horizontal visual streak just above and including the optic disc. Mean rod packing density is 16,006+/-1,668 rods/mm2 for the entire retina, and fairly uniform throughout. Both species have rods with peak absorbance near 540 nm, as well as short-wavelength-sensitive cones (green: 464.5+/-0.7 nm; pallid: 439.7+/-3.5 nm); middle-wavelength-sensitive cones (green: 538.0+/-1.4 nm; pallid: 537.0+/-1.7 nm); and long-wavelength-sensitive cones (green: 613.9+/-3.0 nm; pallid: 617.8+/-7.6 nm).
DOI: 10.1007/s00359-005-0004-6
PubMed: 15983809
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Photoreceptors and visual pigments in the retina of the fully anadromous green sturgeon (Acipenser medirostrus) and the potamodromous pallid sturgeon (Scaphirhynchus albus).</title><author><name sortKey="Sillman, Arnold J" sort="Sillman, Arnold J" uniqKey="Sillman A" first="Arnold J" last="Sillman">Arnold J. Sillman</name><affiliation wicri:level="2"><nlm:affiliation>Section of Neurobiology, Physiology and Behavior, Division of Biological Sciences, University of California, 1 Shields Ave., Davis, CA 95616, USA. ajsillman@ucdavis.edu</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Section of Neurobiology, Physiology and Behavior, Division of Biological Sciences, University of California, 1 Shields Ave., Davis, CA 95616</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Beach, Allicia K" sort="Beach, Allicia K" uniqKey="Beach A" first="Allicia K" last="Beach">Allicia K. Beach</name></author><author><name sortKey="Dahlin, David A" sort="Dahlin, David A" uniqKey="Dahlin D" first="David A" last="Dahlin">David A. Dahlin</name></author><author><name sortKey="Loew, Ellis R" sort="Loew, Ellis R" uniqKey="Loew E" first="Ellis R" last="Loew">Ellis R. Loew</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2005">2005</date><idno type="RBID">pubmed:15983809</idno><idno type="pmid">15983809</idno><idno type="doi">10.1007/s00359-005-0004-6</idno><idno type="wicri:Area/PubMed/Corpus">000533</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000533</idno><idno type="wicri:Area/PubMed/Curation">000533</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000533</idno><idno type="wicri:Area/PubMed/Checkpoint">000533</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000533</idno><idno type="wicri:Area/Ncbi/Merge">000152</idno><idno type="wicri:Area/Ncbi/Curation">000152</idno><idno type="wicri:Area/Ncbi/Checkpoint">000152</idno><idno type="wicri:doubleKey">0340-7594:2005:Sillman A:photoreceptors:and:visual</idno><idno type="wicri:Area/Main/Merge">000E15</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Photoreceptors and visual pigments in the retina of the fully anadromous green sturgeon (Acipenser medirostrus) and the potamodromous pallid sturgeon (Scaphirhynchus albus).</title><author><name sortKey="Sillman, Arnold J" sort="Sillman, Arnold J" uniqKey="Sillman A" first="Arnold J" last="Sillman">Arnold J. Sillman</name><affiliation wicri:level="2"><nlm:affiliation>Section of Neurobiology, Physiology and Behavior, Division of Biological Sciences, University of California, 1 Shields Ave., Davis, CA 95616, USA. ajsillman@ucdavis.edu</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Section of Neurobiology, Physiology and Behavior, Division of Biological Sciences, University of California, 1 Shields Ave., Davis, CA 95616</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Beach, Allicia K" sort="Beach, Allicia K" uniqKey="Beach A" first="Allicia K" last="Beach">Allicia K. Beach</name></author><author><name sortKey="Dahlin, David A" sort="Dahlin, David A" uniqKey="Dahlin D" first="David A" last="Dahlin">David A. Dahlin</name></author><author><name sortKey="Loew, Ellis R" sort="Loew, Ellis R" uniqKey="Loew E" first="Ellis R" last="Loew">Ellis R. Loew</name></author></analytic><series><title level="j">Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology</title><idno type="ISSN">0340-7594</idno><imprint><date when="2005" type="published">2005</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Fishes</term><term>Microscopy, Electron, Scanning (methods)</term><term>Microspectrophotometry (methods)</term><term>Photoreceptor Cells (physiology)</term><term>Photoreceptor Cells (ultrastructure)</term><term>Retina (cytology)</term><term>Retina (metabolism)</term><term>Retinal Pigments (physiology)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="physiology" xml:lang="en"><term>Retinal Pigments</term></keywords><keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Retina</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Retina</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Microscopy, Electron, Scanning</term><term>Microspectrophotometry</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Photoreceptor Cells</term></keywords><keywords scheme="MESH" qualifier="ultrastructure" xml:lang="en"><term>Photoreceptor Cells</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Fishes</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Green sturgeon and pallid sturgeon photoreceptors were studied with scanning electron microscopy (SEM), microspectrophotometry and, in the case of the green sturgeon, retinal whole-mounts. The retinas of both species contain both rods and cones: cones comprise between 23% (whole-mount) and 36% (SEM) of the photoreceptors. The cone population of both species is dominated by large single cones, but a rare small single cone is also present. In both species, most rods have long outer segments of large diameter. A rod with a relatively thin outer segment is present in the pallid sturgeon retina. Mean cone packing density for the entire green sturgeon retina is 4,690+/-891 cones/mm2, with the dorsal retina 14% more dense than the ventral. There is evidence for a horizontal visual streak just above and including the optic disc. Mean rod packing density is 16,006+/-1,668 rods/mm2 for the entire retina, and fairly uniform throughout. Both species have rods with peak absorbance near 540 nm, as well as short-wavelength-sensitive cones (green: 464.5+/-0.7 nm; pallid: 439.7+/-3.5 nm); middle-wavelength-sensitive cones (green: 538.0+/-1.4 nm; pallid: 537.0+/-1.7 nm); and long-wavelength-sensitive cones (green: 613.9+/-3.0 nm; pallid: 617.8+/-7.6 nm).</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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