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울릉도는 동해에 위치한 화산섬으로 해양성기후이며 생태적으로 다양한 식물들이 존재하는 곳이다. 이 지역에서 진균에 대한 보고가 미진하여 나리분지의 식물과 도동의 흙 시료로부터 진균을 분리하고 형태학적 방법과 분자생물학적 방법으로 동정하였다. 그 결과 C. aleuritis, H. valdu-nensis, P. uvicola 와 P. caudate가 분리 동정되었다. 이들 진균은 국내에서 처음 보고되는 것이다. Ulleungdo is a volcanic island inhabited by a variety of animals and plants in an oceanic climate in the East Sea. The presence of filamentous fungi has been rarely reported in Ulleungdo. Thus, in this study some plants in the Nari basin and soils in the Dodong region were sampled. Fungi were isolated from the soil and identified by microscopical and molecular biological methods. Coniothyrium aleuritis, Hypocrea valdunensis, Pestalotiopsis uvicola and P. caudate were identified and found to be undescribed species in Korea.
진균 오염은 톱밥배지를 이용한 실내 표고 재배에 있어서 피해를 주는 요인 중 하나이다. 표고 재배사를 대상으로 진균을 모니터링하는 중, 재배사의 실내공기와 재배사내에서 채집한 버섯파리로부터 여러 진균을 분리 동정하였다. 동정된 진균 중에는 Mucor nidicola, Perenniporia medullapanis, Discosia artocreas, Pseudozyma prolifica, Ascochyta hordei 등을 국내 미기록종으로 보고하고, Penicillium charlesii와 Penicillium brevicompactum의 국내존재를 확인하였다. 본 논문에서는 이들 미기록 균류에 대한 형태적 특성과 더불어 internal transcribed spacer (ITS) rDNA region 또는 calmodulin 유전자 염기서열에 기반한 계통학적 관계에 대해 기술하였다. Fungal contamination is a detrimental factor affecting sawdust media-based shiitake cultivation in greenhouses. During fungal monitoring of greenhouses used for shiitake cultivation, eight fungal species were isolated and identified from indoor air and mushroom flies collected in the greenhouses. The current study reported five species as new in Korea, viz. Ascochyta hordei, Discosia artocreas, Mucor nidicola, Perenniporia medulla-panis, and Pseudozyma prolifica, and confirmed two species, Penicillium charlesii and Penicillium brevicompactum, which were previously recorded in Korea without molecular taxonomic validation. The morphological characteristics and phylogenetic relationships based on nucleotide sequences of the internal transcribed spacer rDNA region or calmodulin gene were described for all identified species.
During a survey of the activities of fungi in steamed sweet potato, stored garlic, agricultural by-products for mushroom cultivation media, and pinewood chips from a pinewood nematode-infected tree, numerous fungal samples were isolated and identified. This study identified five species that have not been previously reported in Korea, namely Geomyces pannorum, Neopestalotiopsis javaensis, Penicillium allii, Penicillium chermesinum, and Ophiognomonia setacea. For all identified species, the cultural features of colonies formed on growth media, their morphological characteristics observed by a light microscope, and their molecular phylogenetic relationships based on nucleotide sequences of the internal transcribed spacer rDNA region or calmodulin gene were described.
Chaenomeles sinensis, called as Chinese quince, belongs to the family Rosaceae and is widely distributed in Korea, China, and Japan. A microorganism was isolated from part of a twig of C. sinensis that showed an abnormal appearance. The microorganism was identified as the slime mold Stemonaria longa of the division Myxomycota, which was previously unrecorded in Korea. The present study reports the morphological characteristics of the isolated fungus and a phylogenetic relationship based on the β-tubulin gene sequences.
Oak mushroom is cultivated using logs and sawdust media as substrates. In this study, fungi were isolated during a monitoring of indoor air in the oak mushroom cultivation houses located in Cheongyang-gun of Chungnam, Geoje-gun of Gyeongnam, Gumi-si of Gyeongbuk, Jangheung-gun of Jeonnam and Yeoju-si of Gyeongggi-do. Identification of the fungi based on morphology and molecular analysis of the internal transcribed spacer region and 28S rDNA, translation elongation factor translation elongation factor 1 a gene, and β-tubulin gene revealed that six fungi, Cenangium acuum, Neopestalotiopsis surinamensis, Metarhizium marquandii, Periconia macrospinosa, Trichoderma petersenii, and Trichoderma paratroviride that have not been recorded previously in Korea.
A fungal isolate DUCC5000 from a garden plant Pachysandra terminalis was identified as Paraconiothyrium brasiliense based on the results of morphological and molecular studies. The fungus formed brown to black conidiomata of (0.2- 0.7)-2(-3.5) mm singly or as a group on PDA. Conidia measured 2-5×1.8-3 μm in size, hyaline, ellipsoid to short-cylindrical, and rounded at both ends. The internal transcribed spacer (ITS) DNA of the isolate shared 100% nucleotide sequence homology with those of known P. brasiliense isolates. Phylogenetic tree inferred from the ITS sequence analysis showed that the DUCC5000 isolate formed a clade with known isolates of P. brasiliense. The fungal mycelia grew better on oatmeal agar than on MEA and PDA. On PDA media under various pH conditions, fungal mycelial growth was observed at pH 9. Colony morphology of the fungus tended to alter depending on the kinds of nutrient media and pH condition. On chromagenic media, the fungus demonstrated its ability to produce extracellular enzymes including amyalse, avicelase, β-glucosidase, protease, and xylanase. However, in pathogenicity testing, no disease symptoms were observed on the leaves of P. terminalis. This strain is the first report on P. terminalis in Korea.