• Korean Journal of Plant Resources
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• v.33 no.2
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• pp.93-105
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• 2020

The study was investigated in vegetation and environmental factors of Thuja koraiensis habitats where provided for ecological evidence data for conservation and management. Study plots were located at altitudes of 1,000~1,588 m with inclinations of 10~30°. A total of 150 taxa was identified 22 quadrates in 6 study sites. The highest basal area was analyzed in Mt. Gariwangsan 49.98 ㎡/㏊ with the lowest Mt. Hwaaksan 3.46 ㎡/㏊. Thuja koraiensis forest was classified into two communities; Abeis nephrolepis-Taxus cuspidata community, Betula ermanii-Thuja koraiensis community. As a result of Multi-Response Permutation Procedures test, there was significant difference among the communities.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.12a
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• pp.47-47
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• 2020

In this study, we aimed to study carnation italian ringspot virus (CIRV) in Erigeron annuus (L.) Pers. in Bonghwa County, Korea. The collected samples showed mosaic and malformation symptoms. To identify the virus species, we performed high-throughput sequencing, reverse transcription polymerase chain reaction, and cloning. The virus was confirmed to be an unreported species, and therefore we performed genome sequencing of the samples. The complete genome was 4,746 nucleotides in length. The CIRV contained five open reading frames (ORFs), and it showed the typical features of members of the genus Tombusvirus. Phylogenetic analyses revealed that ClRV isolates had the highest nucleotide identities with the CZ isolate (95.89%) from Korea. In recent years, these viruses have sporadically been reported in floral scent and medicinal plants. This research found the first natural host infected with CIRV, and provides baseline information to determine the correlation between weeds and crops.

• Korean Journal of Plant Resources
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• v.34 no.6
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• pp.633-660
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• 2021

This study was carried out to elucidate the distribution of vascular plants and their usefulness of Mt. Munsusan (1,205 m) in Bonghwa County, North Gyeongsang Province, South Korea. The vascular plants that were investigated in 2 years (2019 ~ 2020) with 15 times consisted a total of 571 taxa; 94 families, 310 genera, 496 species, 4 subspecies, 63 varieties and 8 formas. For the Korean endemic plants, 17 taxa were recorded and 3 taxa of Vulnerable Species (VU) and 9 taxa of Least Concerned species (LC) categorized by the Korean Forest Service as rare plants were investigated in this region. Furthermore, IV, III degrees of floristic regional indicator plants designated by the Korean Ministry of Environment included 8 taxa and 27 taxa, respectively. Among them, edible, medicinal, ornamental, feed/composting, industrial plants were 391 taxa, 359 taxa, 301 taxa, 241 taxa, 217 taxa, respectively. In addition, 25 taxa of naturalized plants were observed.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.16-16
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• 2020

Systematic studies for genus Anaphalis in Koreaare relatively scarce. As a fundamental step to further taxonomic studies of this genus, we here propose lectotype for A. morii, endemic taxa in Korea with a brief re-evaluation of its taxonomic entity. During the examination of herbarium specimen for A. morii, we found nine sheets of five collections in three herbaria. Among the original materials, we selected a specimen in TI which was first cited by the author and include an additional annotation, matching with his own description. Also, we were able to determine the taxonomic relationships between A. morii and its relatives, A. yakusimensis. Based on our observation, we identified that several morphological characters are clearly differ from A. yakusimensis occurring only Isl. Yakushima in Japan.

• Korean Journal of Plant Resources
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• v.34 no.2
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• pp.144-155
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• 2021

This study was conducted to analyze community structure and species composition of Abies koreana forest. Field survey was carried out from June, 2019 to 2020, September. 121 plots (20×20 m) were set up, 5 herb layer plots (3×3 m) were constructed for each plot, and there, Diameter at Breast Height(DBH), height, environmental factor were measured. It was analyzed that water stress did not have a significant effect on the factors affecting the growth of A. koreana in Mt. Halla-san, and in the case of Mt. Deokyu-san, the more forest stands located at the ridge, the higher the tree density. It was found that the factors affecting the distribution of Abies koreana were not consistent according to the environment of study site.

• Korean Journal of Environment and Ecology
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• v.18 no.2
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• pp.184-190
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• 2004

The purposes of this study were to understand and compare visitors' and residents' perception about Baekdudaegan. To accomplish the purposes of study, the questionnaire surveys in visitor and resident group were employed at Deogyusan area where is a southern part of Baekdudaegan. As for the results, the knowledge level about Baekdudaegan was low in both groups. Visitors' overall attitudes to management of baekdudaegan were more preservation-oriented as compared with resident group. In addition, both groups pointed there is need to be exceptionally managed through special land zoning approach. The Korea Forest Service, Ministry of Environment, National Parks Authority, local government were perceived as proper management agencies for Baekdudaegan. Findings of this study could be used as basic information for establishing effective management policy in Baekdudaegan. Continuous survey effort which can be aroused public opinion would be asked to produce effective decision-making for Baekdudaegan.

• Korean Journal of Environment and Ecology
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• v.18 no.2
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• pp.197-204
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• 2004

The concept of Baekdudaegan(Korean traditional and major mountain system) was conceived toward the close of Silla Kingdom and in the beginning of the Goryeo dynasty. The concept was brought up through the Goryeo dynasty and was completed in the Joseon dynasty. We have to recognize the next two facts to restore the Baekdudaegan concept these days. Firstly, Baekdudaegan is not the highest watershed line but a domain. Secondly, Baekdudaegan is not a set of ridges but a corporate body of a water system and a mountain system. When it comes to fix the management area of Baekdudaegan, it is necessary to make criteria on the basis of traditional ideas and to include natural characteristics considering physical environment. The management area of Baekdudaegan include the third order of stream with the conservation area including the first order of stream. The most important thing in the management strategy is to prevent the damage of configuration of the ground. Baekdudaegan is a symbol of Korea spirit. Therefore, to manage Baekdudaegan wisely is one of ways to lay down the stepping stone of our country's reunification.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.34-34
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• 2020

희귀식물(LC)인 낙지다리(Penthorum chinense Pursh.)는 '수택란', '차근채'로 불리며 약용으로 사용되어 왔으나, 최근 하천개수 및 습지매립 등으로 자생지가 파괴되어 개체수가 급감하고 있다. 따라서 본 연구는 낙지다리의 종 보존 및 활용을 위하여 종자의 최적발아조건을 확인하고자 수행하였다. 종자는 2017년 국립백두대간수목원에서 수집되어 연구에 사용되기 전까지 건조 상태(15℃, 15% RH)로 시드뱅크(-20℃, 40% RH)에 저장하고 있었다. 종자의 최적발아조건을 확인하기 위하여, 항온과 변온 66조건에서 발아율과 최종발아율의 50%가 발아하는데 소요되는 일 수(T₅₀)를 조사하였으며, 생리적 휴면 타파를 위해서 GA₃(20~1000 mg·L^-1) 처리 후 발아율과 T₅₀을 조사하였다. 그리고 GA₃ 처리에 따른 유묘 생장에 대한 GA₃의 영향을 확인하기 위하여 종자 치상 30일 후 유근·아 생장에 대한 영향을 조사하였다. 낙지다리 종자는 항온보다 변온에서 발아율 증가와 T₅₀ 감소를 보였다. 특히 낮/밤의 온도 차가 11~25℃일 때, 85%이상의 발아율을 보였고, 그 이상의 온도차이가 나면 발아율은 감소하는 경향을 보였다. T₅₀은 온도차가 증가할수록 감소하여, 발아가 균일하며 빨라지는 것을 확인 할 수 있었다. 또한 GA₃ 처리시 생리적 휴면 타파가 진행되어 발아율(79.8%~100%)과 발아속도가 증가(T₅₀ 감소)함을 확인하였으나, GA₃ 100mg·L^-1 이상의 농도에서는 무처리(21.2m)에 비하여 유근의 길이 생장을 0.11~6.88mm로 지연시켰다.

• Korean Journal of Plant Resources
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• v.37 no.3
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• pp.235-246
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• 2024

We studied antioxidant activities of Vaccinium oldhamii Miq. from 11 regions in South Korea and blueberries, domestically produced and imported. Correlation analysis between V. oldhamii habitats, environmental factors, and antioxidant properties was conducted. DPPH RC50 values ranged from 220.44 to 902.38㎍/mL, ABTS from 524.29 to 1230.97 ㎍/mL, and FRAP from 1783.71 to 2235.78 ㎛ Fe (II)/g. V. oldhamii from Gumi showed highest DPPH activity, Taean and Haenam for ABTS, and Gimcheon for FRAP. V. oldhamii exhibited superior antioxidant activities compared to blueberries. Meteorological conditions correlated positively with ABTS and DPPH activities, negatively with wind speed and humidity affecting DPPH and phenolic, flavonoid, and anthocyanin contents. Based on these findings, it is suggested that V. oldhamii fruits collected from Gimcheon and Gumi regions can be effectively utilized as natural antioxidants derived from plant materials.

• Korean Journal of Medicinal Crop Science
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• v.27 no.1
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• pp.24-29
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• 2019

Background: Camellia sinensis L.(CS) is a perennial evergreen species of plant whose leaves are used to produce tea. In this plant species, the parts used are the leaves, sub-branch parts are thrown out. Methods and Results: Ethanol extract of sub-branch parts was used for isolation of major compounds by column chromatography. Structures were identified as caffeine (1), (-)-epicatechin (2) and (-)-epicatechin gallate (3) by interpretation of spectroscopic analysis, including $^1H$- and $^{13}C$-NMR. High-performance liquid chromatography (HPLC) method was used to compare the quantitative level of marker compounds in various extraction solvents of sub-branch parts of CS. The content of caffeine, (-)-epicatechin, and (-)-epicatechin gallate in 30% ethanol extract showed higher value with $3.28{\pm}0.57mg/g$, $5.53{\pm}0.88mg/g$, and $1.29{\pm}0.24mg/g$, respectively. Conclusions: These results indicated that not only leaves parts but also sub-branch, could be a good source for the functional material and pharmaceutical industry.