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Evolution and geographical distribution of lichens in the Antarctic

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Title
Evolution and geographical distribution of lichens in the Antarctic
Other Titles
남극지의류의 진화 및 지역적 분포
Authors
Park, Chae Haeng
Mikhail Andreev
Hong, Soon Gyu
Noh, Hyun-Ju
Kim, Eun Hye
Kim, Ji Hee
Keywords
antarctic; evolution; geography; lichen
Issue Date
2008
Citation
Park, Chae Haeng, et al. 2008. Evolution and geographical distribution of lichens in the Antarctic. 한국미생물학회연합. 한국미생물학회연합. 2008.10.16~.
Abstract
Distribution of lichens in Antarctic regions was investigated by phylogenetic analysis of lichen species of the genera Pseudephebe, Umbilicaria, and Usnea. The lichen species were collected from “Leningradskaya”, and “Russkaya” Stations, Lindsey Island, Mt. Moses, Maish Nunatak and King George Island. From the phylogenetic tree of Pseudephebe, Umbilicaria, and Usnea based on combined sequences of ITS and 28S rDNA, geographical isolation of lichen species in Pacific coast of continental Antarctic was not evident. Instead, samples from long distance were clustered together and contained rDNA sequences of high similarity, implying that lichen species can be easily transferred and widely distributed in Pacific coast of continental Antarctic. Particularly, Usnea species with close phylogenetic relationships showed variation in intron possession pattern, implying that introns are easily lost or obtained. However, sequences of introns were generally well conserved in the same phylogenetic lineages. Sharing of same type of intron by lichens from different geographical origin supported the hypothesis of easy geographical distribution of lichen species in Antarctic continent.
URI
http://repository.kopri.re.kr/handle/201206/7856
Conference Name
한국미생물학회연합
Conference Place
한국미생물학회연합
Conference Date
2008.10.16~
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