Genetic diversity of photobionts in Antarctic lecideoid lich
Details of Research
TitleGenetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view pointAbstractAs 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. Copyright â"' British Lichen Society 2012.AcknowledgementsThis study was financially supported by the research funding programme `LOEWE -- Landes-Offensive zur Entwicklung Wissenschaftlich-o¨ konomischer Exzellenz Ìof HesseÅ› Ministry of Higher Education, Research, and the Arts. Antarctica New Zealand is thanked for logistic support and Shulamit Gordon for coordinating LGP, to which this research contributed. Waikato University is thanked for financial support. This manuscript is an output of the FRST-funded IPY Research Programme Understanding, valuing and protecting AntarcticaÅ› unique terrestrial ecosystems: Predicting biocomplexity in Dry Valley ecosystems located at Biological Sciences and ICTAR (International Centre for Terrestrial Antarctic research) at Waikato University.
Details
1st AuthorRuprecht, U.AuthorRuprecht, U.Brunauer, G.Printzen, C.Year2012JournalLichenologistVolume44Number5Pages661-678DOI10.1017/S0024282912000291URLhttps://www.scopus.com/inward/recor.....616b17e1c3093ef182e1e5943KeywordsLecideaLecidea cancriformisLecidellaTrebouxiaTrebouxia impressaTrebouxia jamesii, rank5Author Keywordsclimate zonesLecideaTrebouxia clades
Other
TypeArticleCitationRuprecht, U., Brunauer, G. and Printzen, C. (2012) Genetic diversity of photobionts in Antarctic lecideoid lichens from an ecological view point. Lichenologist, 44(5): 661-678 doi:10.1017/S0024282912000291 IdentifierRuprecht2012aRelevancerank5
Printzen, C., Genetic diversity of photobionts in Antarctic lecideoid lich , [Ruprecht2012a]. Antarctica NZ, accessed 02/08/2026, https://adam.antarcticanz.govt.nz/nodes/view/63747, 10.1017/S0024282912000291