Species independence of eye lens dimensions in teleosts and elasmobranchs
The vertebrate eye lens grows incrementally, adding layers of elongated, tightly packed lens fiber cells at the outer margin of the lens. With subsequent growth, previously-deposited fiber cells degrade, leaving a region of fully denucleated and organelle-free cells which are responsible for the hig...
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ftpubmed:oai:pubmedcentral.nih.gov:10234530 2023-06-18T03:39:49+02:00 Species independence of eye lens dimensions in teleosts and elasmobranchs Leifsdóttir, Rannveig Rögn Campana, Steven E. 2023-06-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10234530/ https://doi.org/10.1371/journal.pone.0286388 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10234530/ http://dx.doi.org/10.1371/journal.pone.0286388 © 2023 Leifsdóttir, Campana https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. PLoS One Research Article Text 2023 ftpubmed https://doi.org/10.1371/journal.pone.0286388 2023-06-04T01:37:39Z The vertebrate eye lens grows incrementally, adding layers of elongated, tightly packed lens fiber cells at the outer margin of the lens. With subsequent growth, previously-deposited fiber cells degrade, leaving a region of fully denucleated and organelle-free cells which are responsible for the high transparency and low light scattering characteristics of the lens. The objective of this study was to determine if the horizon separating the gelatinous outer cortex of the lens from its hardened interior occurred at a consistent location within the lens of several teleost and elasmobranch fish species, and could be linked to fiber cell morphology or function. A fixed ratio of 0.69±0.01 of hardened eye lens diameter (HD) to overall eye lens diameter (LD) was observed in a broad size range of Atlantic cod (Gadus morhua), haddock (Melanogrammus aeglefinus), thorny skate (Amblyraja radiata) and round ray (Rajella fyllae). The location of the hardened lens horizon was similar to that reported for optical plasticity and spherical aberration, but not that of fiber cell denucleation, suggesting that fiber cell dehydration continues after the loss of internal organelles. Our findings support a previous suggestion that the maintenance of optical quality during fish eye lens growth requires a precisely-fixed HD:LD ratio, while the ubiquity of a fixed ratio across fish taxa may suggest that many fish species possess a common refractive index profile. The linear relationship between HD and fish length should allow fish length to be backcalculated from the diameter of the isolated lens core, thus aiding research using isotope ratios of lens laminae or inner cores to reconstruct early life history events. Text atlantic cod Gadus morhua PubMed Central (PMC) PLOS ONE 18 6 e0286388 |
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Research Article Leifsdóttir, Rannveig Rögn Campana, Steven E. Species independence of eye lens dimensions in teleosts and elasmobranchs |
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Research Article |
description |
The vertebrate eye lens grows incrementally, adding layers of elongated, tightly packed lens fiber cells at the outer margin of the lens. With subsequent growth, previously-deposited fiber cells degrade, leaving a region of fully denucleated and organelle-free cells which are responsible for the high transparency and low light scattering characteristics of the lens. The objective of this study was to determine if the horizon separating the gelatinous outer cortex of the lens from its hardened interior occurred at a consistent location within the lens of several teleost and elasmobranch fish species, and could be linked to fiber cell morphology or function. A fixed ratio of 0.69±0.01 of hardened eye lens diameter (HD) to overall eye lens diameter (LD) was observed in a broad size range of Atlantic cod (Gadus morhua), haddock (Melanogrammus aeglefinus), thorny skate (Amblyraja radiata) and round ray (Rajella fyllae). The location of the hardened lens horizon was similar to that reported for optical plasticity and spherical aberration, but not that of fiber cell denucleation, suggesting that fiber cell dehydration continues after the loss of internal organelles. Our findings support a previous suggestion that the maintenance of optical quality during fish eye lens growth requires a precisely-fixed HD:LD ratio, while the ubiquity of a fixed ratio across fish taxa may suggest that many fish species possess a common refractive index profile. The linear relationship between HD and fish length should allow fish length to be backcalculated from the diameter of the isolated lens core, thus aiding research using isotope ratios of lens laminae or inner cores to reconstruct early life history events. |
format |
Text |
author |
Leifsdóttir, Rannveig Rögn Campana, Steven E. |
author_facet |
Leifsdóttir, Rannveig Rögn Campana, Steven E. |
author_sort |
Leifsdóttir, Rannveig Rögn |
title |
Species independence of eye lens dimensions in teleosts and elasmobranchs |
title_short |
Species independence of eye lens dimensions in teleosts and elasmobranchs |
title_full |
Species independence of eye lens dimensions in teleosts and elasmobranchs |
title_fullStr |
Species independence of eye lens dimensions in teleosts and elasmobranchs |
title_full_unstemmed |
Species independence of eye lens dimensions in teleosts and elasmobranchs |
title_sort |
species independence of eye lens dimensions in teleosts and elasmobranchs |
publisher |
Public Library of Science |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10234530/ https://doi.org/10.1371/journal.pone.0286388 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
PLoS One |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10234530/ http://dx.doi.org/10.1371/journal.pone.0286388 |
op_rights |
© 2023 Leifsdóttir, Campana https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_doi |
https://doi.org/10.1371/journal.pone.0286388 |
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PLOS ONE |
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18 |
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6 |
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e0286388 |
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