• Research Article

    The Photoprotective Effects of Gynura Procumbens Against Photoaging: A Comparative Study Based on Extraction Methods

    추출방법에 따른 명월초(Gynura Procumbens)의 광노화 완화 효과

    So Yeon Han, Da Yoon Lee, Ji Sun Moon, Hye Won Lee, Jae Hun Kim, Jae Ho Park

    한소연, 이다윤, 문지선, 이혜원, 김재훈, 박재호

    In this study, we investigated the antioxidant effects and active ingredients of Gynura Procumbens extracts obtained through various extraction methods for the … + READ MORE
    In this study, we investigated the antioxidant effects and active ingredients of Gynura Procumbens extracts obtained through various extraction methods for the development of natural-based cosmetics and pharmaceutical materials. The contents of compounds, total flavonoids, chlorogenic acid, and caffeic acid were compared at different concentrations, revealing the highest content of active ingredients in the 100% ethanol extract. Antioxidant activity assessed by DPPH and ABTS radical scavenging assays showed a concentration-dependent increase in antioxidant activity with the ethanol concentration. Additionally, we validated the DNA damage inhibition and anti-inflammatory effects of Gynura Procumbens extracts through UVB irradiation on Hs68 cell models. The 100% ethanol extract demonstrated significant inhibition of the expression of p-p53, γ-H2AX, iNOS, and COX-2 induced by UVB, indicating its potential in alleviating photodamage effects. Consequently, the efficient extraction of Gynura Procumbens for skin functional material development was confirmed, suggesting the suitability of ethanol or alcohol-based solvents. - COLLAPSE
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    1 April 2024

  • Research Article

    Polyphenol Profiling and Comparison of Extraction Solvents on Useful Component Content and Antioxidant Activity of Rhododendron micranthum Shoot

    꼬리진달래 신초의 폴리페놀 프로파일링과 추출용매에 따른 유용성분 함량 및 항산화 활성 비교

    Jungmok Kang, Yong-Woo Park, Eun-Suk Jung, Daeho Choi

    강정목, 박용우, 정은숙, 최대호

    This study was conducted to provide information on the possibility of using Rhododendron micranthum as resource plant. Through polyphenol profiling of R. … + READ MORE
    This study was conducted to provide information on the possibility of using Rhododendron micranthum as resource plant. Through polyphenol profiling of R. micranthum shoot extract, useful components were selected and the content of useful components and antioxidant activity by extraction solvent were compared. As a result, 37 polyphenol compounds were identified in R. micranthum shoot extract through LC-ESI-MS analysis. Contents by extraction solvent were compared of chlorogenic acid, astragalin, myricetin, and afzelin. Chlorogenic acid was highest at 6.57±0.12 ㎎/g in the ethanol extract, astragalin was 2.29±0.02 ㎎/g in the ethanol extract, myricetin was 4.77±0.06 and 4.52±0.27 ㎎/g in the methanol, ethanol extracts, and afzelin was highest at 0.10±0.01 ㎎/g in the methanol extract. Total polyphenol content of the R. micranthum shoot extract according to the extraction solvent was highest in the ethanol extract at 80.01±2.36 ㎎/g, and total flavonoid content was also highest in the ethanol extract at 78.08±3.44 ㎎/g. The IC50 value of DPPH radical scavenging activity according to the extraction solvent of R. micranthum shoot was lowest in methanol extract at 943.57±10.68 ㎎/L, and the IC50 value of ABTS radical scavenging activity was also lowest in methanol extract at 641.60±7.58 ㎎/L. - COLLAPSE
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    1 April 2024

  • Research Article

    Hepatoprotective Effects of the Extracts of Alnus japonica Leaf on Alcohol-Induced Liver Damage in HepG2/2E1 Cells

    알코올로 유도된 간손상 모델 HepG2/2E1 세포에서 오리나무 잎 추출물의 간보호효과

    Bo-Ram Kim, Tae-Su Kim, Su Hui Seong, Seahee Han, Jin-Ho Kim, Chan Seo, Ha-Nul Lee, Sua Im, Jung Eun Kim, Ji Min Jung, Do-Yun Jeong, Kyung-Min Choi, Jin-Woo Jeong

    김보람, 김태수, 성수희, 한세희, 김진호, 서찬, 이하늘, 임수아, 김정은, 정지민, 정도윤, 최경민, 정진우

    Alcoholic liver disease (ALD) is a significant risk factor in the global disease burden. The stem bark of the Betulaceae plant Alnus … + READ MORE
    Alcoholic liver disease (ALD) is a significant risk factor in the global disease burden. The stem bark of the Betulaceae plant Alnus japonica, which is indigenous to Korea, has been used as a popular folk medicine for hepatitis and cancer. However, the preventive effect of Alnus japonica leaf extracts on alcohol-related liver damage has not been investigated. The objective of this study was to investigate the hepatoprotective effects of the extracts of Alnus japonica leaf (AJL) against ethanol-induced liver damage in HepG2/2E1 cells. Treatment with AJL significantly prevented ethanol-induced cytotoxicity in HepG2/2E1 cells by reducing the levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST). This protective effect was likely associated with antioxidant potential of AJL, as evidenced by the attenuation of reactive oxygen species (ROS) and malondialdehyde (MDA) production and restoration of the depleted glutathione (GSH) levels in ethanol-induced HepG2/2E1 cells. Our findings suggest that FCC might be considered as a useful agent in the prevention of liver damage induced by oxidative stress by increasing the antioxidant defense mechanism. - COLLAPSE
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    1 April 2024

  • Research Article

    A Report on New Distribution and Morphological Characteristics of Archidium ohioense Schimp. ex Müll. Hal. (Archidiaceae)

    Archidium ohioense (Archidiaceae)의 신분포지 및 특징

    Eunhwa Yoo, Kyounghoon Kim, Shin-Ho Kang

    유은화, 김경훈, 강신호

    Archidium Brid. (Archidiaceae), comprising a total of 35 species, is known to be widely distributed from subtropical to temperate regions, excluding the … + READ MORE
    Archidium Brid. (Archidiaceae), comprising a total of 35 species, is known to be widely distributed from subtropical to temperate regions, excluding the polar areas. The distribution of Archidium ohioense Schimp ex Müll. Hal. in Korea has been unclear. This study reports the collection of Archidium ohioense from Mt. Gamak, Yeoncheon-gun, Gyeonggi-do, South Korea. This species is distinguished from similar species by median cell, alar region, capsule. We provide detailed description, illustrations, photographs, and a key to related species. - COLLAPSE
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    1 April 2024

  • Research Article

    Physical Environment Characteristics and Vegetation Structure of Natural Habitats of Pimpinella brachycarpa, Edible and Medicinal Plants

    식·약용식물 참나물 자생지의 환경특성 및 식생구조

    Dae Hui Jeong, Yong Hwan Son, Hae Yun Kwon, Young Ki Kim

    정대희, 손용환, 권해연, 김영기

    The purpose of this study is to investigate the weather, soil characteristics, and location environment of Pimpinella brachycarpa natural habitats in order … + READ MORE
    The purpose of this study is to investigate the weather, soil characteristics, and location environment of Pimpinella brachycarpa natural habitats in order to gather the essential information for the conservation of these habitats. P. brachycarpa are distributed throughout Korea and are mainly found to grow in shady and humid areas between 500 and 1,200 m above sea level. The average annual temperature in Mt. Duta was 13.1°C, and the average annual precipitation in Mt. Jungwon was 1,509 ㎜, which was higher than in other regions. The pH ranged from 4.42 to 4.97, indicating slight acidity. The total N content ranged from 0.18% to 0.68%, and the available P ranged from 13.43 to 531.56 ㎎/㎏, demonstrating notable regional variations. The species diversity index (H') was highest at Mt. Ilwol, measuring 1.713. The evenness (J') ranged from 0.983 to 0.993, and the dominance (D') ranged from 0.007 to 0.017. The similarity index was very low, averaging 24.86%, and it was divided into communities of Wilson`s elm (Ulmus davidiana var. japonica) and communities of Korean maple (Acer pseudo-siebodianum). - COLLAPSE
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    1 April 2024

  • Research Article

    Effect of Spring Potato Cultivation Period on Growth, Yield and Processing Quality of Autumn Potato Cultivars

    봄감자 재배기간이 가을감자 품종의 생육, 수량 및 가공품질에 미치는 영향

    Gyu Bin Lee, Jang Gyu Choi, Do Hee Kwon, Jae Youn Yi, Hee Tae Lee, Yong Ik Jin

    이규빈, 최장규, 권도희, 이재연, 이희태, 진용익

    In Korea, potatoes have served as a side dish, but their role as snacks, such as chips or French fries, has recently … + READ MORE
    In Korea, potatoes have served as a side dish, but their role as snacks, such as chips or French fries, has recently gained traction. While there is a high demand for processing potatoes, there remains a dearth of research on the impact of double cropping, particularly during autumn, on processing quality. Therefore, this study was conducted to determine the effects of different spring potato cultivation periods on growth, yield, and processing quality during autumn cultivation. Following spring planting, harvest was carried out four times: 70 days, 80 days, 90 days, and 100 days. Subsequently, autumn cultivation was carried out in Gangneung and Seocheon regions using these seed potatoes. Results showed an increase in above-ground emergence rate with shorter spring growing period. When seed potatoes with a spring cultivation period of 80 and 90 days were grown in the autumn in the Gangneung region, the stem length was 47.2 to 48.9, which was greater than that of other treatments. However, stem number and leaf color (SPAD) showed no significant differences across cultivation periods. The number of tubers, tuber weight, yield, and marketable yield did not vary significantly with cultivation periods but described clear cultivar dependent differences. The tuber weight of the Saebong cultivar in Gangneung and the Eunseon cultivar in Seocheon was superior. The starch content peaked at 7.9% when seed potatoes grown for 80 days in the spring were harvested after autumn cultivation in the Gangneung region, but there was no significant differences in the Seocheon region. Glucose content showed a clear difference depending on the cultivation period, increasing with longer spring cultivation period during autumn cultivation. In conclusion, as a result of the effect of the spring potato cultivation period on the growth, yield, and processing quality of tubers when cultivating potatoes in double-cropping, the differences depending on the cultivation period were insignificant, while cultivar-based disparities were pronounced. The Eunseon cultivar exhibited robust above-ground growth and yield, while the Saebong cultivar demonstrated excellent processing quality. - COLLAPSE
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    1 April 2024

  • Research Article

    Estimation of Days to Flowering according to Various Altitudes and the Effect of Sowing Dates on Growth Characteristics of Safflower

    잇꽃 재배지대에 따른 개화 소요일수 추정 및 파종시기별 생육 특성

    Young Min Choi, Jeong Seop Moon, Dong Chun Cheong, Eunae Yoo, Hee Kyung Song, Seung Yoon Lee, Jin Jae Lee, So Ra Choi, Hong Ki Kim

    최영민, 문정섭, 정동춘, 유은애, 송희경, 이승윤, 이진재, 최소라, 김홍기

    This study was conducted to estimate the days to flowering based on the effective accumulated temperature at various altitudes in the Jiri … + READ MORE
    This study was conducted to estimate the days to flowering based on the effective accumulated temperature at various altitudes in the Jiri mountain region and to compare growth and yield characteristics according to the sowing date of safflower (Carthamus tinctorius) four genetic resources (local variety, IT323225, IT333473, and IT333482). The safflower four resources were sown on March 29, May 3, May 13, May 24, and June 2. The days from sowing to flowering of the safflower four resources by sowing dates were in the order of the local variety (61.0 days), IT333482 (73.2 days), IT323225 (74.0 days), and IT333473 (74.2 days). The base temperature and effective accumulated temperature for the days to flowering of the safflower four resources calculated based on the daily mean temperature were local variety 6°C, 579°C, IT323225 11°C, 766°C, IT333473 11°C, 768°C, IT333482 10°C, 750°C, respectively. As a result of applying the calculated effective accumulated temperature and daily mean temperature of the past five years (2019 to 2023) by various altitudes and the different sowing dates (every 15 days from April 1 to August 15), the days to flowering of the safflower four resources decreased from April 1 to July 15 during the sowing date and then tended to increase from August 1. In addition, the days to flowering at various altitudes were investigated in the order of plains, mid-mountain, and mountain regions. Among the yield characteristics, plant height, number of branches, number of capitula, number of seeds, and seed weight decreased as the sowing dates were delayed for the safflower four resources. - COLLAPSE
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    1 April 2024

  • Research Article

    A Checklist of North Korea Plant and Current Status of Genetic Resources Held by Domestic and International Arboreta

    북한식물 목록과 국내·외 수목원의 북한식물 유전자원 보유 현황

    Young-Min Choi, Seungju Jo, Hyeonji Lee, Jung-Won Yoon

    최 영민, 조승주, 이현지, 윤정원

    If the plant genetic resources and information-sharing systems held by arboretums worldwide are effectively utilized, it is believed that a conservation system … + READ MORE
    If the plant genetic resources and information-sharing systems held by arboretums worldwide are effectively utilized, it is believed that a conservation system for plant diversity in the currently inaccessible North Korean region could be established. This study was conducted to review the scientific names of plants native to North Korea but not to South Korea and to assess the status of genetic resources held in domestic and international arboretums. To compile a list and status of North Korean plant’s genetic resources, updated checklists of vascular plants in Korean Peninsula and online plant information databases were consulted to compile synonym, distribution range, and other related information. A total of 486 taxa (449 species, 13 subspecies, 21 varieties, 1 forma and 2 hybrids) from 236 genera and 64 families, representing 12.34% of the total native flora of the Korean Peninsular were presented in the North Korea plant list, and the presence of rare, endemic and northern lineage species was confirmed. It was found that 384 taxa from 190 genera, 53 families of North Korean plants are held as genetic resources in 333 arboretums and plant research institutions across 46 countries and 5 continents worldwide. This study is expected to contribute to the construction and application of a species list for plants native to the Korean Peninsula. - COLLAPSE
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    1 April 2024

  • Research Article

    Changes in Growth and Physiological Characteristics of Iris laevigata Fisch. by Shading Treatment

    차광처리가 제비붓꽃의 생장 및 생리적 특성에 미치는 영향

    Seungju Jo, Dong-Hak Kim, Eun-Ju Cheong, Jung-Won Yoon

    조승주, 김동학, 정은주, 윤정원

    In this study, we investigated the growth and physiological responses of Iris laevigata Fisch. to shading treatments in order to suggest optimal … + READ MORE
    In this study, we investigated the growth and physiological responses of Iris laevigata Fisch. to shading treatments in order to suggest optimal light conditions for ex-situ conservation of the northern lineage plants. For this purpose, a control plant receiving full sunlight and different shading treatments (50%, 75%, 95%) were installed, and leaf mass per area, chlorophyll content and fluorescence response, and photosynthetic characteristics were investigated. I. laevigata developed leaves with higher photosynthetic efficiency to adapt to lower light intensity as shading levels increased. Chlorophyll content increased with increasing shading levels, and leaf mass per area decreased with increasing leaf area. The chlorophyll fluorescence responses Fv/Fm and NPQ did not change with shading, and the activity of the carbon fixation system did not differ between treatments. I. laevigata exhibited a light-saturation point equivalent to that of sun plants and maintained photosynthetic capacity similar to that of controls up to 75% shading. The apparent quantum yield of I. laevigata decreased significantly at 95% shading, indicating adaptation to lower light conditions. It seems that the photosynthetic capacity of I. laevigata decreases when grown under 95% shading level compared to full sunlight, and it is judged that the longer the light is restricted by continuous shading, the more unfavorable the growth will be. - COLLAPSE
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    1 April 2024

  • Research Article

    Phenotypical Characteristics Investigation and Selection of Superior Individuals from Natural Habitats of Sageretia thea in South Korea

    국내 자생 상동나무 표현형 특성조사 및 우량 개체 선발

    Dae Hui Jeong, Hae Yun Kwon, Young Ki Kim

    정대희, 권해연, 김영기

    In this study, the growth, physical characteristics of fruit and soil chemistry were investigated by grouping S. thea populations. The soil for … + READ MORE
    In this study, the growth, physical characteristics of fruit and soil chemistry were investigated by grouping S. thea populations. The soil for each group was sandy loam or sandy loam, and it was analyzed to be slightly acidic to neutral, with a pH ranging from 5.6 to 7.0. Additionally, the leaf size was highest in the G7 group, and overall fruit growth was highest in the G1 group, confirming differences between the groups. The sweetness ranged from 16.8° Brix to 12.3° Brix, indicating a higher sweetness compared to Vaccinium oldhamill, blueberry, and blackberry. The correlation analysis between soil chemistry and S. thea growth characteristics revealed a significant negative correlation between calcium (Ca) and fruit growth characteristics. Furthermore, a significant positive correlation was observed between sodium (Na) and fruit acidity, as well as between cation exchange capacity (CEC) and fruit hardness. - COLLAPSE
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    1 April 2024
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