Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region
The taxonomic position of the Antarctic subendemic species Didymodon gelidus Cardot is controversial, notably because of its notorious sterile condition. Considering the overall appearance and the reddish coloration of the plants, the leaf areolation, reaction of the leaf lamina with KOH, and the pr...
Published in: | Acta Societatis Botanicorum Poloniae |
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Polish Botanical Society
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Online Access: | https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3609 https://doi.org/10.5586/asbp.3609 |
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ftpbsocietyojs:oai:journals.pbsociety.org.pl:article/8405 2023-05-15T14:03:56+02:00 Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region Ronikier, Michał Saługa, Marta Jiménez, Juan A. Ochyra, Ryszard Stryjak-Bogacka, Monika 2018-12-31 application/pdf https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3609 https://doi.org/10.5586/asbp.3609 eng eng Polish Botanical Society https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3609/7617 https://pbsociety.org.pl/journals/index.php/asbp/article/downloadSuppFile/asbp.3609/1992 https://pbsociety.org.pl/journals/index.php/asbp/article/downloadSuppFile/asbp.3609/1993 https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3609 doi:10.5586/asbp.3609 Copyright (c) 2018 Michał Ronikier, Marta Saługa, Juan A. Jiménez, Ryszard Ochyra, Monika Stryjak-Bogacka http://creativecommons.org/licenses/by/4.0 CC-BY Acta Societatis Botanicorum Poloniae; Vol 87, No 4 (2018): Polar terrestrial ecosystems: ecology, diversity, and biogeography 2083-9480 Antarctica biodiversity Bryophyta Didymodon gelidus Îles Kerguelen molecular analyses South Georgia Subantarctica taxonomy info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2018 ftpbsocietyojs https://doi.org/10.5586/asbp.3609 2020-11-11T19:21:08Z The taxonomic position of the Antarctic subendemic species Didymodon gelidus Cardot is controversial, notably because of its notorious sterile condition. Considering the overall appearance and the reddish coloration of the plants, the leaf areolation, reaction of the leaf lamina with KOH, and the presence of multicellular axillary gemmae, this species was considered to be conspecific with the Holarctic D. brachyphyllus (Sull.) R. H. Zander. As a result, the latter was established as a bipolar species. Recent detailed morphological and anatomical studies have revealed a number of features which enable recognition of D. gelidus and D. brachyphyllus, including the shape of leaves, leaf apices and basal leaf cells, as well as costal anatomy. Here, within a larger-scale project focused on the evolution and biogeographical connections of Antarctic endemic mosses, we analyzed the genetic relationships of D. gelidus and D. brachyphyllus to confront the morphology-based conclusions. We selected five geographically distinct collections per species and applied a multilocus DNA analysis based on nuclear (ITS) and plastid (atpIH, trnLF, trnG, rps4) sequences to assess the genetic differentiation of these two taxa. We also placed their lineages in a wider phylogenetic context using an extended sampling of Didymodon taxa and select other representatives of Pottiaceae. Our results showed a clear genetic differentiation of the Southern Hemisphere (D. gelidus) and Northern Hemisphere (D. brachyphyllus) plants. Moreover, the phylogenetic analysis showed that D. gelidus formed a strongly supported clade on its own which was distantly related to D. brachyphyllus. Accordingly, the two taxa do not represent geographical vicariants. Didymodon gelidus must be considered a distinct endemic species of the austral polar region, having its optimal occurrence in the Antarctic and weakly penetrating northward to South Georgia and Îles Kerguelen in the Subantarctic. The relatively isolated phylogenetic position of D. gelidus likely suggests its old age. Article in Journal/Newspaper Antarc* Antarctic Antarctica Polish Botanical Society Journals Antarctic Austral Îles Kerguelen ENVELOPE(69.167,69.167,-49.250,-49.250) Kerguelen The Antarctic Acta Societatis Botanicorum Poloniae 87 4 |
institution |
Open Polar |
collection |
Polish Botanical Society Journals |
op_collection_id |
ftpbsocietyojs |
language |
English |
topic |
Antarctica biodiversity Bryophyta Didymodon gelidus Îles Kerguelen molecular analyses South Georgia Subantarctica taxonomy |
spellingShingle |
Antarctica biodiversity Bryophyta Didymodon gelidus Îles Kerguelen molecular analyses South Georgia Subantarctica taxonomy Ronikier, Michał Saługa, Marta Jiménez, Juan A. Ochyra, Ryszard Stryjak-Bogacka, Monika Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region |
topic_facet |
Antarctica biodiversity Bryophyta Didymodon gelidus Îles Kerguelen molecular analyses South Georgia Subantarctica taxonomy |
description |
The taxonomic position of the Antarctic subendemic species Didymodon gelidus Cardot is controversial, notably because of its notorious sterile condition. Considering the overall appearance and the reddish coloration of the plants, the leaf areolation, reaction of the leaf lamina with KOH, and the presence of multicellular axillary gemmae, this species was considered to be conspecific with the Holarctic D. brachyphyllus (Sull.) R. H. Zander. As a result, the latter was established as a bipolar species. Recent detailed morphological and anatomical studies have revealed a number of features which enable recognition of D. gelidus and D. brachyphyllus, including the shape of leaves, leaf apices and basal leaf cells, as well as costal anatomy. Here, within a larger-scale project focused on the evolution and biogeographical connections of Antarctic endemic mosses, we analyzed the genetic relationships of D. gelidus and D. brachyphyllus to confront the morphology-based conclusions. We selected five geographically distinct collections per species and applied a multilocus DNA analysis based on nuclear (ITS) and plastid (atpIH, trnLF, trnG, rps4) sequences to assess the genetic differentiation of these two taxa. We also placed their lineages in a wider phylogenetic context using an extended sampling of Didymodon taxa and select other representatives of Pottiaceae. Our results showed a clear genetic differentiation of the Southern Hemisphere (D. gelidus) and Northern Hemisphere (D. brachyphyllus) plants. Moreover, the phylogenetic analysis showed that D. gelidus formed a strongly supported clade on its own which was distantly related to D. brachyphyllus. Accordingly, the two taxa do not represent geographical vicariants. Didymodon gelidus must be considered a distinct endemic species of the austral polar region, having its optimal occurrence in the Antarctic and weakly penetrating northward to South Georgia and Îles Kerguelen in the Subantarctic. The relatively isolated phylogenetic position of D. gelidus likely suggests its old age. |
format |
Article in Journal/Newspaper |
author |
Ronikier, Michał Saługa, Marta Jiménez, Juan A. Ochyra, Ryszard Stryjak-Bogacka, Monika |
author_facet |
Ronikier, Michał Saługa, Marta Jiménez, Juan A. Ochyra, Ryszard Stryjak-Bogacka, Monika |
author_sort |
Ronikier, Michał |
title |
Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region |
title_short |
Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region |
title_full |
Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region |
title_fullStr |
Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region |
title_full_unstemmed |
Multilocus DNA analysis supports Didymodon gelidus (Musci, Pottiaceae) as a distinct endemic of the austral polar region |
title_sort |
multilocus dna analysis supports didymodon gelidus (musci, pottiaceae) as a distinct endemic of the austral polar region |
publisher |
Polish Botanical Society |
publishDate |
2018 |
url |
https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3609 https://doi.org/10.5586/asbp.3609 |
long_lat |
ENVELOPE(69.167,69.167,-49.250,-49.250) |
geographic |
Antarctic Austral Îles Kerguelen Kerguelen The Antarctic |
geographic_facet |
Antarctic Austral Îles Kerguelen Kerguelen The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Acta Societatis Botanicorum Poloniae; Vol 87, No 4 (2018): Polar terrestrial ecosystems: ecology, diversity, and biogeography 2083-9480 |
op_relation |
https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3609/7617 https://pbsociety.org.pl/journals/index.php/asbp/article/downloadSuppFile/asbp.3609/1992 https://pbsociety.org.pl/journals/index.php/asbp/article/downloadSuppFile/asbp.3609/1993 https://pbsociety.org.pl/journals/index.php/asbp/article/view/asbp.3609 doi:10.5586/asbp.3609 |
op_rights |
Copyright (c) 2018 Michał Ronikier, Marta Saługa, Juan A. Jiménez, Ryszard Ochyra, Monika Stryjak-Bogacka http://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5586/asbp.3609 |
container_title |
Acta Societatis Botanicorum Poloniae |
container_volume |
87 |
container_issue |
4 |
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1766274855015022592 |