https://repository.kopri.re.kr/handle/201206/5249 2026-04-19T19:49:01Z 2026-04-19T19:49:01Z Kim, Mincheol Lim, Hyun-Soo Hyun, Chang-Uk Cho, Ahnna Noh, Hyun-Ju Hong, Soon Gyu Kim, Ok-Sun https://repository.kopri.re.kr/handle/201206/9646 2022-03-24T07:14:22Z 2019-03-01T00:00:00Z

Title: Local-scale variation of soil bacterial communities in ice-free regions of maritime Antarctica Authors: Kim, Mincheol; Lim, Hyun-Soo; Hyun, Chang-Uk; Cho, Ahnna; Noh, Hyun-Ju; Hong, Soon Gyu; Kim, Ok-Sun Abstract: The majority of biogeographic studies in Antarctic terrestrial ecosystems have focused on macroscopic eukaryote taxa. In contrast, microbial taxa have been almost neglected or examined without sufficient spatial coverage. Here, we examined the spatial distribution of soil bacterial communities and their relation to local environmental gradients in ice-free regions of the maritime Antarctic. Soils in this region were dominated by Actinobacteria and Proteobacteria, which are typically found in Antarctic soils. Notably, candidate divisions AD3 and WPS-2, which rarely occur in other biomes, were found in high abundance in acidic surface soils. Soil pH and total organic carbon (TOC) were the primary drivers of the bacterial community structure and various geochemical variables also played important roles in structuring bacterial community composition. Bacterial communities were significantly correlated to measured environmental variables, most of which are spatially structured at the local spatial scale (0.5？8 km). This suggests that spatial heterogeneity of environmental factors is an important driver of shifts in bacterial communities. Although various sets of environmental variables were related to bacterial communities, a large proportion of community variation remained unexplained. This indicates that bacterial communities in Antarctic soils may be governed by other biotic or abiotic factors which are not typically measured in other biome studies.

2019-03-01T00:00:00Z Jung, Jin-Woo Lee, Hyoungseok Choi, Han-Gu Kim, Jeong-Hoon https://repository.kopri.re.kr/handle/201206/9629 2022-03-24T07:14:04Z 2019-01-02T00:00:00Z

Title: Complete mitogenome of the Cape petrel Daption capense from Barton Peninsula, King George Island, Antarctica Authors: Jung, Jin-Woo; Lee, Hyoungseok; Choi, Han-Gu; Kim, Jeong-Hoon Abstract: 알락풀마갈매기 Daption capense는 남극지역을 포함한 남반구 전체에서 관찰되는 해양조류이다. 이 연구에서 우리는 이 종이 포함된 속의 유전적 특성을 설명하기 위해 미토콘드리아 유전체(GenBank 등록번호 : MH924023)를 보고하였다. 분석결과 알락풀마갈매기의 미토콘드리아유전체는 17,312 bp 길이이고, 13개의 단백질코딩유전자, 2개의 rRNA 유전자, 그리고 22개의 tRNA 유전자로 구성되어 있었다. 13개의 단백질코딩 유전자는 A (31.1%), C (30.3%), T (25.4%),G (13.2%) 순으로 구성되었고, GC의 합은 43.5%로 나타났다. 이 결과는 슴새목 조류의 유전적 연구를 위해 유용한 정보를 제공한다.

2019-01-02T00:00:00Z N.H. Yu J.-S. Hur P.K. Divakar M. Talavera Hong, Soon Gyu S.-O. Oh M.-H. Jeong C.-H. Park J.A. Kim S.-Y. Park https://repository.kopri.re.kr/handle/201206/9533 2022-03-24T07:14:41Z 2018-01-01T00:00:00Z

Title: Endophytic and endolichenic fungal diversity in maritime Antarctica based on cultured material and their evolutionary position among Dikarya Authors: N.H. Yu; J.-S. Hur; P.K. Divakar; M. Talavera; Hong, Soon Gyu; S.-O. Oh; M.-H. Jeong; C.-H. Park; J.A. Kim; S.-Y. Park Abstract: Fungal endophytes comprise one of the most ubiquitous groups of plant symbionts. They live asymptomatically within vascular plants, bryophytes and also in close association with algal photobionts inside lichen thalli. While endophytic diversity in land plants has been well studied, their diversity in lichens and bryophytes are poorly understood. Here, we compare the endolichenic and endophytic fungal communities isolated from lichens and bryophytes in the Barton Peninsula, King George Island, Antarctica. A total of 93 fungal isolates were collected from lichens and bryophytes. In order to determine their identities and evolutionary relationships, DNA sequences of the nuclear internal transcribed spacer (ITS), nuclear ribosomal small subunit (nuSSU), nuclear large subunit (nuLSU), and mitochondrial SSU (mtSSU) rDNA were obtained and protein coding markers of the two largest subunit of RNA polymerase II (RPB1 and RPB2) were generated. Multilocus phylogenetic analyses revealed that most of the fungal isolates were distributed in the following six classes in the phylum Ascomycota: Dothideomycetes, Eurotiomycetes, Lecanoromycetes, Leotiomycetes, Pezizomycetes and Sordariomycetes. For the first time we report the presence of subphylum Mortierellomycotina that may belong to an undescribed order in endophytic fungi. Taken together, our results imply that lichens and bryophytes provide similar niches and harbour a selection of these fungi, indicating generalists within the framework of evolutionary adaptation.

2018-01-01T00:00:00Z Park, Chae Haeng Jeong, Gajin Hong, Soon Gyu Kim, Kyung Mo Kim, Ok-Sun https://repository.kopri.re.kr/handle/201206/7465 2022-03-24T07:12:38Z 2016-01-01T00:00:00Z

Title: Bacterial communities in Antarctic lichens Authors: Park, Chae Haeng; Jeong, Gajin; Hong, Soon Gyu; Kim, Kyung Mo; Kim, Ok-Sun Abstract: So far, many studies to survey the bacterial communities in lichen thalli from diverse geographical areas have shown that Alphaproteobacteria is a predominating bacterial class in most lichens. In this study, we analyzed bacterial communities in several Antarctic lichens with different growth form and substrates. Bacterial community composition in fruticose and foliose lichens, Cladonia, Umbilicaria, Usnea, and crustose lichens, Buelia granulosa, Amandinea coniops, and Ochrolechia parella from King George Island, Antarctica was analyzed by pyrosequencing of bacterial 16S rRNA gene. Results showed that Proteobacteria, Acidobacteria, Actinobacteria, and Bacteroidetes were predominant phyla. The predominant bacterial class in most of the samples was Alphaproteobacteria, which have also been found previously in other lichen species. Acetobacteriaceae of the order Rhodospiralles in Alphaproteobacteria was the most abundant bacterial family in Antarctic lichens. The LAR1 lineage of the order Rhizobiales, a putative N-fixer which has been frequently observed in lichens from temperate area, was detected only from few samples at low frequency. It is expected that other bacterial taxa are working as N-fixer in Antacrtic lichens. From the PcoA analysis of fastUniFrac distance matrix, it was proposed that microbial community structures in Antarctic lichens were affected by host species, growth form, and substrates.

2016-01-01T00:00:00Z