Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra
Abstract The hypothesis that selection on the opsin gene is efficient in tuning vision to the ambient light environment of an organism was assessed in 49 populations of 12 Mysis crustacean species, inhabiting arctic marine waters, coastal littoral habitats, freshwater lakes (‘glacial relicts’) and t...
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Online Access: | http://dx.doi.org/10.1111/j.1365-294x.2012.05516.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2012.05516.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2012.05516.x |
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crwiley:10.1111/j.1365-294x.2012.05516.x 2024-06-02T08:02:42+00:00 Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra AUDZIJONYTE, ASTA PAHLBERG, JOHAN VILJANEN, MARTTA DONNER, KRISTIAN VÄINÖLÄ, RISTO 2012 http://dx.doi.org/10.1111/j.1365-294x.2012.05516.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2012.05516.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2012.05516.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 Molecular Ecology volume 21, issue 9, page 2176-2196 ISSN 0962-1083 1365-294X journal-article 2012 crwiley https://doi.org/10.1111/j.1365-294x.2012.05516.x 2024-05-03T12:01:47Z Abstract The hypothesis that selection on the opsin gene is efficient in tuning vision to the ambient light environment of an organism was assessed in 49 populations of 12 Mysis crustacean species, inhabiting arctic marine waters, coastal littoral habitats, freshwater lakes (‘glacial relicts’) and the deep Caspian Sea. Extensive sequence variation was found within and among taxa, but its patterns did not match expectations based on light environments, spectral sensitivity of the visual pigment measured by microspectrophotometry or the history of species and populations. The main split in the opsin gene tree was between lineages I and II, differing in six amino acids. Lineage I was present in marine and Caspian Sea species and in the North American freshwater Mysis diluviana , whereas lineage II was found in the European and circumarctic fresh‐ and brackish‐water Mysis relicta, Mysis salemaai and Mysis segerstralei . Both lineages were present in some populations of M. salemaai and M. segerstralei . Absorbance spectra of the visual pigment in nine populations of the latter three species showed a dichotomy between lake (λ max = 554–562 nm) and brackish‐water (Baltic Sea) populations (λ max = 521–535 nm). Judged by the shape of spectra, this difference was not because of different chromophores (A2 vs. A1), but neither did it coincide with the split in the opsin tree (lineages I/II), species identity or current light environments. In all, adaptive evolution of the opsin gene in Mysis could not be demonstrated, but its sequence variation did not conform to a neutral expectation either, suggesting evolutionary constraints and/or unidentified mechanisms of spectral tuning. Article in Journal/Newspaper Arctic Mysis segerstralei Wiley Online Library Arctic Molecular Ecology 21 9 2176 2196 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The hypothesis that selection on the opsin gene is efficient in tuning vision to the ambient light environment of an organism was assessed in 49 populations of 12 Mysis crustacean species, inhabiting arctic marine waters, coastal littoral habitats, freshwater lakes (‘glacial relicts’) and the deep Caspian Sea. Extensive sequence variation was found within and among taxa, but its patterns did not match expectations based on light environments, spectral sensitivity of the visual pigment measured by microspectrophotometry or the history of species and populations. The main split in the opsin gene tree was between lineages I and II, differing in six amino acids. Lineage I was present in marine and Caspian Sea species and in the North American freshwater Mysis diluviana , whereas lineage II was found in the European and circumarctic fresh‐ and brackish‐water Mysis relicta, Mysis salemaai and Mysis segerstralei . Both lineages were present in some populations of M. salemaai and M. segerstralei . Absorbance spectra of the visual pigment in nine populations of the latter three species showed a dichotomy between lake (λ max = 554–562 nm) and brackish‐water (Baltic Sea) populations (λ max = 521–535 nm). Judged by the shape of spectra, this difference was not because of different chromophores (A2 vs. A1), but neither did it coincide with the split in the opsin tree (lineages I/II), species identity or current light environments. In all, adaptive evolution of the opsin gene in Mysis could not be demonstrated, but its sequence variation did not conform to a neutral expectation either, suggesting evolutionary constraints and/or unidentified mechanisms of spectral tuning. |
format |
Article in Journal/Newspaper |
author |
AUDZIJONYTE, ASTA PAHLBERG, JOHAN VILJANEN, MARTTA DONNER, KRISTIAN VÄINÖLÄ, RISTO |
spellingShingle |
AUDZIJONYTE, ASTA PAHLBERG, JOHAN VILJANEN, MARTTA DONNER, KRISTIAN VÄINÖLÄ, RISTO Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra |
author_facet |
AUDZIJONYTE, ASTA PAHLBERG, JOHAN VILJANEN, MARTTA DONNER, KRISTIAN VÄINÖLÄ, RISTO |
author_sort |
AUDZIJONYTE, ASTA |
title |
Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra |
title_short |
Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra |
title_full |
Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra |
title_fullStr |
Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra |
title_full_unstemmed |
Opsin gene sequence variation across phylogenetic and population histories in Mysis (Crustacea: Mysida) does not match current light environments or visual‐pigment absorbance spectra |
title_sort |
opsin gene sequence variation across phylogenetic and population histories in mysis (crustacea: mysida) does not match current light environments or visual‐pigment absorbance spectra |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1365-294x.2012.05516.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2012.05516.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2012.05516.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Mysis segerstralei |
genre_facet |
Arctic Mysis segerstralei |
op_source |
Molecular Ecology volume 21, issue 9, page 2176-2196 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/j.1365-294x.2012.05516.x |
container_title |
Molecular Ecology |
container_volume |
21 |
container_issue |
9 |
container_start_page |
2176 |
op_container_end_page |
2196 |
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1800747180316688384 |