• Journal of the Korean Wood Science and Technology
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• 제22권3호
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• pp.39-44
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• 1994

This study was carried out to investigate features pertaining to spiral thickenings, which was considered one of the most important diagnostic values, for wood identification. Species, kind of cells with spiral thickening, and ridge numbers of spiral thickening per axial mm were recorded in 71 families, 144 genera, 316 species of Korean hardwoods. Spiral thickening was observed in 128 of 316 species, about 40.5 % of all the investigated, and classified into 6 types on the basis of distributional patterns and morphological features as follows: 1. Type 1, present throughout all vessel element, which was found in 14 families, 19 genera, 43 species. 2. Type 2, present only in small vessel element, which was found in 18 families, 29 genera, 41 species. 3. Type 3, present both in small vessel element and wood fibers, which was found in 8 families, 17 genera, 29 species. 4. Type 4, present in wood fibers, which was found in 1 family, 1 genus, 1 species. 5. Type 5, present only in tail of vessel element, which was found in 4 families, 5 genera, 9 species. 6. Type 6, being present in vessel element faintly or partially, which was found in 2 families, 3 genera, 5 species.

• Journal of Species Research
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• 제4권2호
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• pp.109-126
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• 2015

As a subset study to discover indigenous prokaryotic species in Korea, a total of 39 bacterial strains assigned to the classes Betaproteobacteria and Gammaproteobacteria were isolated from diverse environmental samples collected from soil, tidal flat, freshwater, seawater, seaweed, wetland, plant roots, guts of insects, and fermented foods. From the high 16S rRNA gene sequence similarity (>99.1%) and formation of a robust phylogenetic clade with the closest species, it was determined that each strain belonged to each independent and predefined bacterial species. There is no official report that these 39 species have been described in Korea; therefore 4 species of 4 genera in the order Burkholderiales and 1 species in the order Neisseriales within the class Betaproteobacteria, and 10 species of 6 genera in the order Alteromonadales, 11 species of 3 genera in the order Pseudomonadales, 4 species of 4 genera in the order Enterobacteriales, 2 species of 2 genera in the order Vibrionales, 1 species in the order Aeromonadales, 3 species of 3 genera in the order Oceanospirillales, 2 species of 2 genera in the order Xanthomonadales, and 1 species in the order Chromatiales within the Gammaproteobacteia are reported for proteobacterial species found in Korea. Gram reaction, colony and cell morphology, basic biochemical characteristics, isolation source, and strain IDs are also described in the species description section.

• 식물병연구
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• 제8권1호
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• pp.34-40
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• 2002

깜부기병균은 지역의 기주에 따라 발생됨이 보고되었다. 한국 일본, 중국 3국의 깜부기병균의 기주, 발생현황에 대하여 조사한 결과는 다음과 같다. 우리나라에서는 4과 12속 19종, 일본에서 24과 87속 191종, 중국에서는 12과 140종의 식물에서 보고되었다. 깜부기병균의 종은, 우리나라에서는 6속 29종, 일본에서 14속 140종을 재편하여 17속 114종으로 보고되었으며 그 후 여러 연구자의 보고에 의해 Schizonella 속과 Namnfldtiomyces 속이 포함되어 총 19속 122종이 되었다 중국에서 14속 109종이 보고되었으나 그 후 여러 연구자에 의해 Liroa속, Glomosporium속, Rhamphopora속, Micromotryum속이 첨가되어 총 18속 158종으로 병원균 수와 기 주식물의 수는 점차 늘어가는 추세이다. 잡부기병 발생현황을 보면 식물체 부분적 침입과 화기의 부분 또는 전체 침입을 하였다.

• 한국환경복원기술학회지
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• 제10권2호
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• pp.44-53
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• 2007

The vascular plants of the studied area in the Gyehwado was listed 378 taxa; 99 families, 259 genera, 322 species, 1 subspecies, 50 varieties and 5 forms. In this, Woody plants were 130 taxa (34.4%), Herbaceous plants were 248 taxa (65.6%) of all 378 taxa vascular plants. Pteridophyta were 7 families, 9 genera, 11 taxa (2.9%), Gymnospermae were 4 families, 5 genera, 9 taxa (2.4%) and Angiospermae were 88 families, 245 genera, 358 taxa (97.7%). Angiospermae in this, Monocotyledoneae were 10 families, 45 genera, 60 taxa (16.8%) and Dicotyledoneae were 78 families, 200 genera, 298 taxa (83.2%). Based on the list of the rare plants by the Forest Research Institute, recorded in the studied areas; Phacelurus latifolius (Preservation priority order; No. 194), Tricyrtis dilatata (No. 97), Aristolochia contorta (No. 151) and based on the list of Korean endemic plants, 6 taxa were recorded; Cephalotaxus koreana, Populus tomentiglandulosa, Carpinus coreana, Indigofera koreana, Forsythia koreana, Weigela subsessilis. Specific plant species by floral region were total 30 taxa; Wistaria floribunda in class IV, 5 taxa (Ligustrum ovalifolium, Callicarpa mollis, Lonicera subhispida, etc.) in class III, 24 taxa (Cephalotaxus koreana, Aristolochia contorta, Grewia biloba var. parviflora, etc.) in class I. The naturalized plants in this site were 12 families, 27 genera, 34 species, 2 varieties, 36 taxa and naturalization rate was 9.5% of all 378 taxa vascular plants.

• Mycobiology
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• 제48권5호
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• pp.351-363
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• 2020

Here, we investigated fungal microbiota in the understory root layer of representative well-conserved geographically segregated natural wetlands in the Korean Peninsula. We obtained 574,143 quality fungal sequences in total from soil samples in three wetlands, which were classified into 563 operational taxonomic units (OTU), 5 phyla, 84 genera. Soil texture, total nitrogen, organic carbon, pH, and electrical conductivity of soil were variable between geographical sites. We found significant differences in fungal phyla distribution and ratio, as well as genera variation and richness between the wetlands. Diversity was greater in the Jangdo islands wetland than in the other sites (Chao richness/Shannon/Simpson's for wetland of the Jangdo islands: 283/6.45/0.97 > wetland of the Mt. Gariwang primeval forest: 169/1.17/0.22 > wetland of the Hanbando geology: 145/4.85/0.91), and this variance corresponded to the confirmed number of fungal genera or OTUs (wetlands of Jangdo islands: 42/283> of Mt. Gariwang primeval forest: 32/169> of the Hanbando geology: 25/145). To assess the uniqueness of the understory root layer fungus taxa, we analyzed fungal genera distribution. We found that the percentage of fungal genera common to two or three wetland sites was relatively low at 32.3%, while fungal genera unique to each wetland site was 67.7% of the total number of identified fungal species. The Jangdo island wetland had higher fungal diversity than did the other sites and showed the highest level of uniqueness among fungal genera (Is. Jangdo wetland: 34.5% > wetland of Mt. Gariwang primeval forest: 28.6% > wetland of the Hanbando geology: 16.7%).

• 한국자원식물학회지
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• 제22권6호
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• pp.558-570
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• 2009

The vascular plants in Jeju composed of 21 families 62 genera, 190 species, 7 varieties with 197 taxa in Pteridophyta, 3 families 5 genera, 7 species, 3 forma with 10 taxa in gymnosperm (Coniferophyta) and 143 families 703 genera, 1,622 species, 114 varieties and 47 forma with 1,783 taxa in Endospermae. The total number of taxa was 1,990 consisting 167 families, 770 genera, 1,818 species, 121 varieties and 50 forma. Three families, 4 genera 4 species and 1 variety in Pteridophyta and 1 family, 1 genus I species, 1 forma of Coniferophyta were endemic to Jeju. Five families, 8 genera and 8 species in the Monocotyledonae of Endospermae and 23 families, 32 genera, 21 species, 16 varieties and 7 forma and 44 taxa in Cholipetalae, and 9 families, 24 genera, 12 species, 13 varieties and 7 forma, total 32 taxa in Sympetalae were endemic to Jeju. Total 90 taxa with 41 families, 69 genera, 46 species, 29 varieties and 15 forma were drawn up as endemic plants in Jeju. As the numbers show on, Jeju has more biodiversity especially plant diversity than any other places in Korea. It was an important region in regard to geographical position. The rarity on plants from Jeju has been assessed based on the IUCN red list categories and criteria at both regional and global levels. There was one species in each extinct (EX) and extinct in the Wild (EW). The EX and EW species were Rhododendron saisiuense Nakai (Ericaceae) and Asplenium antiquum Makino (Aspleniaceae), respectively. Three taxa, Rhododendron dauricum L. (Ericaceae), Lycopodium sieboldii Miq., and Lycopodiella cernua (L.) Serm (Lycopodiaceae) were species that is extinct in the region (RE). Sixty-one taxa were critically endangered (CR), 13 were endangered (EN), and 83 were vulnerable (VU) at regional level. The taxa listed on a Red List corresponds 26.9% of total taxa in Jeju. At global level, there were 19 taxa in CR, 4 in EN, and 1 in VU (Vulnerable) as the category of threat. The rest taxa (133 taxa) were classified as Least Concern (LC). According to the results of the assessment, conservation measures must be taken for total of 157 species that were categorized in threaten including one of EX, one of EW and three extinct in the region immediately. Of 157 species, 61 were CR, 13 are EN and 83 were VU.

• Journal of Microbiology
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• 제44권5호
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• pp.572-576
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• 2006

To obtain primary idea on oral bacterium species that are generally present in periodotally healthy Koreans, the oral bacterial flora in the saliva of four periodontally healthy Koreans at different ages (5, 32, 35, 65) was investigated in this study. For this investigation, 16S rRNA gene clone libraries were generated from the saliva of the four healthy Koreans, and 50 clones were randomly selected from each saliva clone library and sequenced. Totally, 37 different kinds of bacterial 16S rRNA gene sequences were identified based on sequence homology search through GenBank database. The 37 kinds of saliva clone sequences were classified to 14 genera and 2 uncultured and 1 unidentified bacteria. Among the 14 identified genera, Streptococcus, Prevotella, and Veillollella were common genera, and Streptococcus was dominant genus that accounted for 7 different species. Among the seven Streptococcus species, S. salivarius appeared as the most common species. More numbers of species belonging to the genera Streptococcus and Prevotella was present in saliva from ages 32 and 35. While saliva from ages 5 and 65 showed more numbers of species belonging to the genera Rothia, including potential pathogenic species. Overall, saliva of a young child and a senior showed higher bacterial diversity than that of young adults.

• Journal of Plant Biology
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• 제39권2호
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• pp.149-159
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• 1996

The order of Rhododendro-Quercetalia mongolicae representing temperate oak forests in Korea was characterized in terms of presence of taxa of different rank. 140 releves were analysed for percentage contribution of each species, genera and families in syntaxa under consideration as well as extracton of diagnostic genera and families for syntaxa by an ordination technique. The Rhododendro-Quercetalia is characterized by high diversity of tree and shrub species contributing 40% of the total floristic composition as well as by a high contribution of the genus Rhododendron and the absence of the genus Fagus, characteristic of the QuercoFagetea sensu lato. The character families for the Rhododendron and Quercus include Liliaceae and Compositae, whereas Acer, Carex, Viola, Rhododendron and Quercus are the most common among genera. Rhododendron and Quercus are regarded as the transgressive cheractergenera, whereas the families of Pinaceae and Ericaceae are considered companions (in sense of the terminology of the Braun-Blanquet syntaxonomy) for the order. Family appeared to be an inadequate rank for diagnoses of alliances and suballiances. On the other hand, genus was found to be the most effective rank in differentiating the alliances and suballiances. The Lindero-Quercenion shares the same character-genera with the order Rhododendro-Quercetalia. Character genera of the suballiances Callicarpo-quercenion are Carpinus, Styrax, Smilax and Callicarpa, and those of the Pino-Quercion list Euonymus, Saussurea and Tilia.

• Journal of Microbiology and Biotechnology
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• 제13권6호
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• pp.846-852
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• 2003

rpoB DNAs (279 bp) from 34 species of 5 actinomycete genera were sequenced and a phylogenetic tree was constructed based on the sequences obtained. The genera were clearly differentiated in the rpoB tree, forming clades specific to their respective genus. In addition, 2 signature amino acid residues specific to Streptomyces were found in a multiple alignment of the deduced amino acid sequences. To empirically confirm that this rpoB gene analysis system could be used to differentiate actinomycete isolates, the proposed system was used to identify 16 actinomycete isolates from Jeju Island. All isolates were successfully differentiated into the genera Streptomyces and Micromonospora. Accordingly, this is the first report that an rpoB sequence analysis has been effectively used to differentiate actinomycete strains at the genus level.

• 한국환경과학회지
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• 제20권4호
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• pp.443-455
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• 2011

This study was conducted to investigate the flora of Mt. Jang located at Haeundae-Gu in Busan. The survey for the flora was carried out from Oct. 2008 to Sep. 2009. The results were obtained as follows. The flora consists of 5 forms, 22 varieties, 238 species, 198 genera, 91 families, 47 orders, 7 classes, and 3 divisions as total 265 taxa. The typical communities were Osmunda japonica com., Stephanandra incisa com., Gleichenia japonica com., Eurya japonica-Pinus thunbergii com., Styrax japonica-Pinus thunbergii com., and Smilax china com. which were distributed along Forest Bathing Area and Yangun Falls, Miscanthus sinensis for. purpurascens com., Carpinus turczaibovii var. coreana com and Pseudosasa japonica were distributed around the top of mountain. According to the ecological characteristic species, the evergreen plants were observed 15 taxa 14 genera 13 families, the naturalized plants 18 taxa 17 genera 10 families, the specific plants categorized by Ministry of Environment 20 taxa 18 genera 18 families, the endangered plant 1 specie Utricularia yakusimensis, and the cultivated plants were observed 21 taxa 18 genera 14 families.