• Applied Microscopy
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• v.50
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• pp.29.1-29.6
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• 2020

Erythronium japonicum (E. japonicum) and Corylopsis coreana Uyeki (C. coreana Uyeki, Korean winter hazel) have been shown to significantly decrease 1,3-dichloro-2-propanol (1,3-DCP)-induced generation of reactive oxygen species and CYP2E1 activity in HuH7, human hepatocytes. In this study, we expanded upon the previous study and investigated the effects of E. japonicum and C. coreana Uyeki extracts on 1,3-DCP-induced liver damage in rats. The pre-treatment of rats with these extracts alleviated a decrease in body weight and reduced 1,3-DCP-induced increase in catalytic activities of hepatic enzymes, such as aspartate aminotransferase and alanine aminotransferase, in the serum. Moreover, treatment with the extracts restored the 1,3-DCP-induced decreases in anti-oxidant enzyme activities, such as the activities of superoxide dismutase and catalase, in the rat liver. Histopathological studies also strongly supported the results of enzyme activities. These results suggest a possibility that the extracts of E. japonicum and C. coreana Uyeki can be a remedy for alleviating 1,3-DCP-induced liver damage in animals.

• Korean Journal of Environment and Ecology
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• v.20 no.2
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• pp.227-234
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• 2006

The comparison of Corylopsis coreana populations between natural groups and deforestation groups is carried in five regions such as Seungju, Woldeung, Hwangjeon in Suncheon, Myeongseok in Jinju and Mt. Baegun in Pocheon. The number of sprouting per both $100m^2$ and each individual stump were appeared more in deforestation than in natural groups. In contrast, the height and the diameter of individuals by the number of sprouting are higher and larger in the natural groups. The relationship between the floristic composition and vegetation in the two groups of C. coreana populations was not appeared. Corylopsis coreana are propagated sprouting as well as seedling in deforestation groups located an opening area. Because of the powerful environmental adaptability through growth of the sprouting and the seedling in deforestation groups, the population of C. coreana are not extinction of species oneself, and on the contrary are showed expansion of C. coreana population after temporary disturbance.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2005.10a
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• pp.53-55
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• 2005

• Journal of Environmental Impact Assessment
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• v.18 no.1
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• pp.51-57
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• 2009

Corylopsis coreana Uyeki is endemic species in the Korean peninsula and is designated a Category Endangered Plant Species by the Wildlife Protection Act of South Korea. We developed the plan and cooperative model within the local community for the species conservation. In order to carry out this plan we first investigated the ecological characteristics of the species. The species shows patterns of discontinuous distribution and is coupled with the unusual feature of only growing on northern exposed slopes. Although Corylopsis coreana is cut the stem every year, many new sprouts are still grown from the root. Natural germination of the seed occurs only on north-facing slopes, but not on south-facing slopes at spring. That is, the species is highly influenced by soil moisture until the seedling stage has been reached. This factor limits the distribution of the species. When saplings are planted on south-facing slopes, they grow well. The information we gathered greatly helped with efforts to draw up conservation plans. In addition, when the information was shared with the local community, builders and residents showed great interest and displayed a will to help with conservation efforts. Therefore, a cooperative model within the local community was drawn up for the conservation of the species. Accordingly this model could be applied at mitigation measure at environment impact assessment.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2005.04a
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• pp.85-101
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• 2005

This study was carried out a field survey and review articles to investigate a characteristic of the distribution pattern in Korean endemic Corylopsis coreana. Distribution of Corylopsis coreana was found from Boseung-gun, Gwangyang-si, Suncheon- si, Jeumanl-myeon Goheung-gun, Ganjeon-myeon Gurye-gun, Mt. Cheongwan Jangheung-gun, Nogodan Mt. Jiri in Jeollanam-do, Mt. Cheonhwang Namwon-si and Beamsagol and Banyabong Mt. Jiri, in Jeollabuk-do, Sancheong-gun, hadong-gun and Namhea-gun in Gyeongsangnam-do and Mt. Backun, Pocheon-si in Gyeonggi-do. Total flora in the distribution region of Coryloplsis coreana were recorded as 242 taxa; 70 families, 159 genus, 216 species, 22 varieties, 4 forma. Ratio of taxonomic categories was consisted of Pteridophyte $5.8\%$, Gymnosperm $3.7\%$, Dicotyledon $18.6\%$ and Monocotyledon $71.9\%$. Ratio of Life cycle styles was Annual $1.7\%$ and Perennial $98.3\%$. Ratio of growth habit was appeared to Herb $44.2\%$, Vine $12.4\%$, Shrub $17.8\%$ and Tree $25.6\%$. The distribution region of Corylopsis coreana found to typical type which distribute in N, NE or NE slope. The native Corylopsis coreana of Sinjeonri Sungju-eup in Jellanam-do appeared to a declining tendency which caused by influence of tree lager.

• Korean Journal of Pharmacognosy
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• v.47 no.1
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• pp.1-6
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• 2016

Phytochemical investigation of the twigs of Corylopsis coreana afforded 10 phenolic compounds, bergenin (1), 6'-O-galloylbergenin (2), 3'-O-galloylbergenin (3), (-)-catechin (4), (-)-epicatechin (5), (-)-epicatechin-3-O-galloyl ester (6), 4-methoxy-3,-5-dihydroxybenzoic acid (7), gallic acid (8), 2,4,6-trimethoxyphenol-1-O-${\beta}-\small{D}$-glucopyranoside (9), and 2,4,6-trimethoxyphenol-1-O-${\beta}-\small{D}$-(6-O-galloyl)-glucopyranoside (10). Their structures were characterized by spectroscopic data and identified by comparing these data with those in the literatures. The compounds 3, 9 and 10 were isolated for the first time from this source. All the isolates (1-10) were tested for their cytotoxic activity against A549, SK-OV-3, SK-MEL-2, and HCT15 cell lines in vitro using the SRB bioassay. The compounds 5, 7 and 8 exhibited selective cytotoxic activity against SK-MEL-2 cell line.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.26 no.4
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• pp.1-16
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• 2023

The purpose of this study is to understand the vegetation structure of the Corylopsis coreana habitats in South Korea and their correlation with environmental factors, in order to provide basic data for preparing conservation. A total of 40 vegetation survey plots were established in around Southern region, Gangwon-do and Gyeonggi-do Province. The cluster analysis revealed four distinct clusters: Quercus mongolica-Pinus densiflora (QmPd), Castanea crenata (Cc), Quercus mongolica (Qm), and Pinus koraiensis (Pk). Among them, the QmPd cluster was selected as the representative community. Soil texture analysis that most areas consisted of loamy soil and were distributed on the northern aspects. The plantation, represented by Pk, exhibited a high content of exchangeable aluminum (5.227±0.342 mg/kg), suggesting the need for soil improvement and monitoring in these habitats. The canopy openness (forest gap) ranged from 11% to 21%, indicating a relatively closed canopy in many survey plots. Non-metric multidimensional scaling analysis indicated heterogeneous species composition between the QmPd cluster and the Pk cluster (total R² = 0.608).

• Korean Journal of Environment and Ecology
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• v.19 no.3
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• pp.269-278
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• 2005

The dynamics and distribution characteristics of Coryjopsis coreana popujation at Cheongsogol, Sunchon, Cholanam-do, Korea, were investigated. The Coryiopsis coreana pop ulation was distributed along the forest edge and it showed characteristics which were distributed on only directional slopes of the north, northeast or northwest. The Coryjopsis coreana constituted subtree or shrub layer in the forest, and its floristic composition was basically similar to those of adjacent areas where the species does not exist. The number of stump was 6.25 per $25\;m^2$, and each stump had 3 sproutings in average. The density of the Corylopsis coreana population in the study area was lower than that in other area, which suggests the population is declining in the study area.

• Korean Journal of Plant Taxonomy
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• v.44 no.3
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• pp.208-221
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• 2014

The Holocene Hypsithermal Interval(or climatic optimum) was the warmest post-glacial period: temperatures rose to as much as $1-4^{\circ}C$ above present temperatures. We hypothesize that southern plants expanded northward and upward during the Hypsithermal Interval. The Hypsithermal relict populations are defined as populations which distribute mainly in Is. Cheju and Southern subregions and have populations of short-distance dispersion separated by more than 100 km from the nearest distribution. The Hypsithermal relict species were identified and their distributions were mapped based on botanical floras and checklist, herbaria specimens, ecological studies, and field surveys of selected species. Evaluation of the hypothesis was based on reviews of published pollen stratigraphic and paleoecological studies. The results showed that the Holocene Hypsithermal relicts such as Corylopsis coreana Uyeki, Carpinus turczaninowii Hance, Stewartia koreana Nakai ex Rehder were expanded northward during the Holocene Hypsithermal Interval.