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- 저자 : ( Seobihn Lee ) (검색결과 4 건)
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Diversity of Marine-Derived Aspergillus from Tidal Mudflats and Sea Sand in Korea
( Seobihn Lee ),( Myung Soo Park ),( Young Woon Lim ) 한국균학회 2016 Mycobiology Vol.44 No.4
Aspergillus (Trichocomaceae, Eurotiales, and Ascomycota) is a genus of well-defined asexual spore-forming fungi that produce valuable compounds such as secondary metabolites and enzymes; however, some species are also responsible for diseases in plants and animals, including humans. To date, 26 Aspergillus species have been reported in Korea, with most species located in terrestrial environments. In our study, Aspergillus species were isolated from mudflats and sea sand along the western and southern coasts of Korea. A total of 84 strains were isolated and identified as 17 Aspergillus species in 11 sections on the basis of both morphological characteristics and sequence analysis of the calmodulin gene (CaM) locus. Commonly isolated species were A. fumigatus (26 strains), A. sydowii (14 strains), and A. terreus (10 strains). The diversity of Aspergillus species isolated from mudflats (13 species) was higher than the diversity of those from sea sand (five species). Four identified species―A. caesiellus, A. montenegroi, A. rhizopodus, and A. tabacinus―are in the first records in Korea. Here, we provide detailed descriptions of the morphological characteristics of these four species.
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Fungal Diversity and Enzyme Activity Associated with the Macroalgae, Agarum clathratum
( Seobihn Lee ),( Myung Soo Park ),( Hanbyul Lee ),( Jae-jin Kim ),( John A. Eimes ),( Young Woon Lim ) 한국균학회 2019 Mycobiology Vol.47 No.1
Agarum clathratum, a brown macroalgae species, has recently become a serious environmental problem on the coasts of Korea. In an effort to solve this problem, fungal diversity associated with decaying A. clathratum was investigated and related b-glucosidase and endoglucanase activities were described. A total of 233 fungal strains were isolated from A. clathratum at 15 sites and identified 89 species based on morphology and a multigene analysis using the internal transcribed spacer region (ITS) and protein-coding genes including actin (act), b-tubulin (benA), calmodulin (CaM), and translation elongation factor (tef1). Acremonium, Corollospora, and Penicillium were the dominant genera, and Acremonium fuci and Corollospora gracilis were the dominant species. Fifty-one species exhibited cellulase activity, with A. fuci, Alfaria terrestris, Hypoxylon perforatum, P. madriti, and Pleosporales sp. Five showing the highest enzyme activities. Further enzyme quantification confirmed that these species had higher cellulase activity than P. crysogenum, a fungal species described in previous studies. This study lays the groundwork for bioremediation using fungi to remove decaying seaweed from populated areas and provides important background for potential industrial applications of environmentally friendly processes.
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Diversity and enzyme activity of Penicillium species associated with macroalgae in Jeju Island
박명수,Seobihn Lee,Seung-Yoon Oh,Ga Youn Cho,Young Woon Lim 한국미생물학회 2016 The journal of microbiology Vol.54 No.10
A total of 28 strains of 19 Penicillium species were isolated in a survey of extracellular enzyme-producing fungi from macroalgae along the coast of Jeju Island of Korea. Penicillium species were identified based on morphological and β-tubulin sequence analyses. In addition, the halo-tolerance and enzyme activity of all strains were evaluated. The diversity of Penicillium strains isolated from brown algae was higher than the diversity of strains isolated from green and red algae. The commonly isolated species were Penicillium antarcticum, P. bialowiezense, P. brevicompactum, P. crustosum, P. oxalicum, P. rubens, P. sumatrense, and P. terrigenum. While many strains showed endoglucanase, β-glucosidase, and protease activity, no alginase activity was detected. There was a positive correlation between halo-tolerance and endoglucanase activity within Penicillium species. Among 19 Penicillium species, three species–P. kongii, P. olsonii, and P. viticola– have not been previously recorded in Korea.
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Diversity of fungi associated with roots of Calanthe orchid species in Korea
Park, Myung Soo,Eimes, John A.,Oh, Sang Hoon,Suh, Hwa Jung,Oh, Seung-Yoon,Lee, Seobihn,Park, Ki Hyeong,Kwon, Hyuk Joon,Kim, Soo-Young,Lim, Young Woon MICROBIOLOGICAL SOCIETY OF KOREA 2018 JOURNAL OF MICROBIOLOGY -SEOUL- Vol.56 No.1
While symbiotic fungi play a key role in the growth of endangered Calanthe orchid species, the relationship between fungal diversity and Calanthe species remains unclear. Here, we surveyed root associated fungal diversity of six Calanthe orchid species by sequencing the internal transcribed spacer (ITS) region using 454 pyrosequencing. Our results revealed that Paraboeremia and Coprinopsis are dominant fungal genera among Calanthe species. In terms of overall relative abundance, Paraboeremia was the most common fungal genus associated with Calanthe roots, followed by Coprinopsis. Overall fungal diversity showed a significant degree of variation depending on both location and Calanthe species. In terms of number of different fungal genera detected within Calanthe species, C. discolor had the most diverse fungal community, with 10 fungal genera detected. This study will contribute toward a better understanding of those fungi that are required for successful cultivation and conservation of Korean Calanthe species.
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