Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning
Absorbance spectra of single rhabdoms were studied by microspectrophotometry (MSP) and spectral sensitivities of whole eyes by electroretinography (ERG) in three glacial-relict species of opossum shrimps (Mysis). Among eight populations from Fennoscandian fresh-water lakes (L) and seven populations...
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ftpubmed:oai:pubmedcentral.nih.gov:4819508 2023-05-15T16:13:03+02:00 Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning Donner, Kristian Zak, Pavel Viljanen, Martta Lindström, Magnus Feldman, Tatiana Ostrovsky, Mikhail 2016-03-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4819508/ http://www.ncbi.nlm.nih.gov/pubmed/26984686 https://doi.org/10.1007/s00359-016-1079-y en eng Springer Berlin Heidelberg http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4819508/ http://www.ncbi.nlm.nih.gov/pubmed/26984686 http://dx.doi.org/10.1007/s00359-016-1079-y © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. CC-BY Original Paper Text 2016 ftpubmed https://doi.org/10.1007/s00359-016-1079-y 2016-04-17T00:10:21Z Absorbance spectra of single rhabdoms were studied by microspectrophotometry (MSP) and spectral sensitivities of whole eyes by electroretinography (ERG) in three glacial-relict species of opossum shrimps (Mysis). Among eight populations from Fennoscandian fresh-water lakes (L) and seven populations from the brackish-water Baltic Sea (S), L spectra were systematically red-shifted by 20–30 nm compared with S spectra, save for one L and one S population. The difference holds across species and bears no consistent adaptive relation to the current light environments. In the most extensively studied L–S pair, two populations of M. relicta (Lp and Sp) separated for less than 10,000 years, no differences translating into amino acid substitutions have been found in the opsin genes, and the chromophore of the visual pigments as analyzed by HPLC is pure A1. However, MSP experiments with spectrally selective bleaching show the presence of two rhodopsins (λmax ≈ 525–530 nm, MWS, and 565–570 nm, LWS) expressed in different proportions. ERG recordings of responses to “red” and “blue” light linearly polarized at orthogonal angles indicate segregation of the pigments into different cells differing in polarization sensitivity. We propose that the pattern of development of LWS and MWS photoreceptors is governed by an ontogenetic switch responsive to some environmental signal(s) other than light that generally differ(s) between lakes and sea, and that this reaction norm is conserved from a common ancestor of all three species. Text Fennoscandian PubMed Central (PMC) Journal of Comparative Physiology A 202 4 297 312 |
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Original Paper |
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Original Paper Donner, Kristian Zak, Pavel Viljanen, Martta Lindström, Magnus Feldman, Tatiana Ostrovsky, Mikhail Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning |
topic_facet |
Original Paper |
description |
Absorbance spectra of single rhabdoms were studied by microspectrophotometry (MSP) and spectral sensitivities of whole eyes by electroretinography (ERG) in three glacial-relict species of opossum shrimps (Mysis). Among eight populations from Fennoscandian fresh-water lakes (L) and seven populations from the brackish-water Baltic Sea (S), L spectra were systematically red-shifted by 20–30 nm compared with S spectra, save for one L and one S population. The difference holds across species and bears no consistent adaptive relation to the current light environments. In the most extensively studied L–S pair, two populations of M. relicta (Lp and Sp) separated for less than 10,000 years, no differences translating into amino acid substitutions have been found in the opsin genes, and the chromophore of the visual pigments as analyzed by HPLC is pure A1. However, MSP experiments with spectrally selective bleaching show the presence of two rhodopsins (λmax ≈ 525–530 nm, MWS, and 565–570 nm, LWS) expressed in different proportions. ERG recordings of responses to “red” and “blue” light linearly polarized at orthogonal angles indicate segregation of the pigments into different cells differing in polarization sensitivity. We propose that the pattern of development of LWS and MWS photoreceptors is governed by an ontogenetic switch responsive to some environmental signal(s) other than light that generally differ(s) between lakes and sea, and that this reaction norm is conserved from a common ancestor of all three species. |
format |
Text |
author |
Donner, Kristian Zak, Pavel Viljanen, Martta Lindström, Magnus Feldman, Tatiana Ostrovsky, Mikhail |
author_facet |
Donner, Kristian Zak, Pavel Viljanen, Martta Lindström, Magnus Feldman, Tatiana Ostrovsky, Mikhail |
author_sort |
Donner, Kristian |
title |
Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning |
title_short |
Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning |
title_full |
Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning |
title_fullStr |
Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning |
title_full_unstemmed |
Eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict Mysis species (Crustacea): physiology and genetics of differential tuning |
title_sort |
eye spectral sensitivity in fresh- and brackish-water populations of three glacial-relict mysis species (crustacea): physiology and genetics of differential tuning |
publisher |
Springer Berlin Heidelberg |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4819508/ http://www.ncbi.nlm.nih.gov/pubmed/26984686 https://doi.org/10.1007/s00359-016-1079-y |
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Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4819508/ http://www.ncbi.nlm.nih.gov/pubmed/26984686 http://dx.doi.org/10.1007/s00359-016-1079-y |
op_rights |
© The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00359-016-1079-y |
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Journal of Comparative Physiology A |
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202 |
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4 |
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297 |
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312 |
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