Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point
Abstract As part of a comprehensive study on lecideoid lichens in Antarctica, we investigated the photobiont diversity and abundance in 119 specimens of lecideoid lichens from 11 localities in the continental and maritime Antarctic. A phylogeny of these photobiont ITS sequences, including samples fr...
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crcambridgeupr:10.1017/s0024282912000291 2024-09-15T17:48:37+00:00 Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point RUPRECHT, Ulrike BRUNAUER, Georg PRINTZEN, Christian 2012 http://dx.doi.org/10.1017/s0024282912000291 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282912000291 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms The Lichenologist volume 44, issue 5, page 661-678 ISSN 0024-2829 1096-1135 journal-article 2012 crcambridgeupr https://doi.org/10.1017/s0024282912000291 2024-08-28T04:02:57Z Abstract As part of a comprehensive study on lecideoid lichens in Antarctica, we investigated the photobiont diversity and abundance in 119 specimens of lecideoid lichens from 11 localities in the continental and maritime Antarctic. A phylogeny of these photobiont ITS sequences, including samples from arctic, alpine and temperate lowland regions, reveals the presence of five major Trebouxia clades in Antarctic lecideoid lichens. Two clades are formed by members of the T. jamesii and T. impressa aggregates but for all other clades no close match to any known Trebouxia species could be found in sequence databases. One genetically uniform and well-supported Trebouxia clade was found only in the climatically unique cold desert regions of the Antarctic (preliminarily called Trebouxia sp.URa1), where it is preferentially associated with the highly adapted Antarctic endemic lichen Lecidea cancriformis . Levels of genetic photobiont diversity differ slightly, but insignificantly among ecological regions of the Antarctic and do not decrease towards regions with more unfavourable ecological conditions. The genetic diversity of photobionts varies among mycobiont species. Most pairwise comparisons reveal that these differences are insignificant, probably due to the small sample size for most species. The Antarctic lichens studied here are predominantly not specific for a single photobiont species or lineage, except for Lecidella greenii and L. siplei . These two species are preferably associated with Trebouxia sp. URa2, although in the sampling areas of both species, a pool of several other photobionts is available. Lecidea cancriformis associates with the highest diversity of photobionts followed by L. andersonii. Article in Journal/Newspaper Antarc* Antarctic Antarctica Cambridge University Press The Lichenologist 44 5 661 678 |
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Cambridge University Press |
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English |
description |
Abstract As part of a comprehensive study on lecideoid lichens in Antarctica, we investigated the photobiont diversity and abundance in 119 specimens of lecideoid lichens from 11 localities in the continental and maritime Antarctic. A phylogeny of these photobiont ITS sequences, including samples from arctic, alpine and temperate lowland regions, reveals the presence of five major Trebouxia clades in Antarctic lecideoid lichens. Two clades are formed by members of the T. jamesii and T. impressa aggregates but for all other clades no close match to any known Trebouxia species could be found in sequence databases. One genetically uniform and well-supported Trebouxia clade was found only in the climatically unique cold desert regions of the Antarctic (preliminarily called Trebouxia sp.URa1), where it is preferentially associated with the highly adapted Antarctic endemic lichen Lecidea cancriformis . Levels of genetic photobiont diversity differ slightly, but insignificantly among ecological regions of the Antarctic and do not decrease towards regions with more unfavourable ecological conditions. The genetic diversity of photobionts varies among mycobiont species. Most pairwise comparisons reveal that these differences are insignificant, probably due to the small sample size for most species. The Antarctic lichens studied here are predominantly not specific for a single photobiont species or lineage, except for Lecidella greenii and L. siplei . These two species are preferably associated with Trebouxia sp. URa2, although in the sampling areas of both species, a pool of several other photobionts is available. Lecidea cancriformis associates with the highest diversity of photobionts followed by L. andersonii. |
format |
Article in Journal/Newspaper |
author |
RUPRECHT, Ulrike BRUNAUER, Georg PRINTZEN, Christian |
spellingShingle |
RUPRECHT, Ulrike BRUNAUER, Georg PRINTZEN, Christian Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point |
author_facet |
RUPRECHT, Ulrike BRUNAUER, Georg PRINTZEN, Christian |
author_sort |
RUPRECHT, Ulrike |
title |
Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point |
title_short |
Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point |
title_full |
Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point |
title_fullStr |
Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point |
title_full_unstemmed |
Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point |
title_sort |
genetic diversity of photobionts in antarctic lecideoid lichens from an ecological view point |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1017/s0024282912000291 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282912000291 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
The Lichenologist volume 44, issue 5, page 661-678 ISSN 0024-2829 1096-1135 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0024282912000291 |
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The Lichenologist |
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44 |
container_issue |
5 |
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661 |
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678 |
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1810290066821480448 |