• Research Article

    Antioxidant Activity, Total Polyphenol Content, and Total Flavonoid Content of Boehmeria nivea var. tenacissima (Gaudich.) Miq. Collected from Six Regions

    채집지역에 따른 섬모시풀(Boehmeria nivea var. tenacissima (Gaudich.) Miq.)의 항산화활성, 총 폴리페놀 함량, 총 플라보노이드 함량 차이

    Kyung Jun Lee, Hye Min Seo, Shin Ae Lee, Jin-Ho Kim, Hae Lim Kim

    이경준, 서혜민, 이신애, 김진호, 김해림

    This study measured the antioxidant activity and phytochemical content of 192 Boehmeria nivea var. tenacissima (Gaudich.) Miq. collected from six regions in … + READ MORE
    This study measured the antioxidant activity and phytochemical content of 192 Boehmeria nivea var. tenacissima (Gaudich.) Miq. collected from six regions in order to identify the possibility of its industrial application. Two antioxidant activity assay (DPPH radical scavenging activity and ABTS radical scavenging activity) and two phytochemical content assay (total polyphenol content (TPC) and total flavonoid content (TFC)) of 192 samples were analyzed. The results showed that the DPPH radical scavenging activity of 192 samples was ranged from 0.02 to 1.35 ㎎AAE/g, and among them, the samples collected from Goheung (0.53 ± 0.37) and Ulleungdo (0.52 ± 0.28) showed the highest activity. The ABTS radical scavenging activity was showed the ranged from 0.07 to 1.81 ㎎AAE/g, and the samples collected at Ulleungdo (0.47 ± 0.36) showed the highest activity. The total polyphenol content of 192 samples was 18.6 to 234.8 ugGAE/g, and the samples collected at Mokpo (93.4 ± 34.7) and Jindo (90.4 ± 24.5) showed the highest content. The total flavonoid content was 0.10 to 1.22 ㎎QE/g and the samples collected at Ulleungdo (0.49 ± 0.31) showed the highest content. In the correlation analysis, there was no significant relationship between the environmental conditions and the antioxidant activity. The total polyphenol content showed a positive correlation with daily temperature difference, and negative correlation with average wind speed and average humidity, and total flavonoid content showed negative correlations with the average temperature, maximum temperature, and minimum temperature. This result can be used as a basic data establish the cultivation conditions of B. nivea var. tenacissima (Gaudich.) Miq. as a functional raw material to increase the usefulness of B. nivea var. tenacissima (Gaudich.) Miq.. - COLLAPSE
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    1 February 2023

  • Research Article

    Evaluation Antioxidant and Anti-inflammatory Activity of Ethanolic Extracts of Myriophyllum spicatum L. in Lipopolysaccharide-stimulated RAW 264.7 Cells

    이삭물수세미(Myriophyllum spicatum L.) 에탄올 추출물의 항산화와 항염증 효과

    Chul Hwan Kim, Young-Kyung Lee, Min Jin Kim, Ji Su Choi, Buyng Su Hwang, Pyo Yun Cho, Young Jun Kim, Yong Tae Jeong

    김철환, 이영경, 김민진, 최지수, 황병수, 조표연, 김영준, 정용태

    Myriophyllum spicatum L. has been used as an ornamental in ponds and aquariums, and as a folk remedy for inflammation and pus. … + READ MORE
    Myriophyllum spicatum L. has been used as an ornamental in ponds and aquariums, and as a folk remedy for inflammation and pus. Nevertheless, the biological activity and underlying mechanisms of anti-inflammatory effects are unclear. This study is aimed at investigating the antioxidative and anti-inflammatory activities of ethanol extract of Myriophyllum spicatum L. (EMS) in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Antioxidant activity of EMS was assessed by radical-scavenging effects on ferric reducing antioxidant power (FRAP) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals. As inflammatory response parameters produced by LPS-stimulated RAW 264.7 cells were quantified to assess the anti-inflammatory activity of EMS. Our results showed that EMS increased FRAP and DPPH radical- scavenging activity. In EMS-treated RAW 264.7 cells, the production of NO, PGE2, TNF-α and IL-1β was significantly inhibited at the non-cytotoxic concentration. In addition, EMS significantly attenuated LPS-stimulated the toll-like receptor (TLR) 4/myeloid differentiation protein (MyD) 88 signaling pathway, and inhibited nuclear translocation of nuclear factor-kappa B(NF-κB). Positive correlations were noted between anti-inflammatory activity and antioxidant activity. In conclusion, it was indicated that EMS suppresses the transcription of inflammatory factors by inhibiting the TLR4/MyD88/NF-κB signaling pathway, thereby suppressing LPS-stimulated inflammation in RAW 264.7 cells. This study highlights the potential role of EMS against inflammation and associated diseases. - COLLAPSE
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    1 February 2023

  • Research Article

    Inhibitory Activity of Wild-Simulated Ginseng against Non-Alcoholic Fatty Liver Disease in HepG-2 Cells

    산양삼(Wild-Simulated Ginseng)의 비알코올성 지방간 억제활성

    So Jung Park, Yurry Um, Min Yeong Choi, Jin Boo Jeong

    박소정, 엄유리, 최민영, 정진부

    In this study, we investigated in vitro inhibitory activity of wild-simulated ginseng (WSG) against non-alcoholic fatty liver disease using HepG-2 cells. T0901317 … + READ MORE
    In this study, we investigated in vitro inhibitory activity of wild-simulated ginseng (WSG) against non-alcoholic fatty liver disease using HepG-2 cells. T0901317 treatment increased the lipid accumulation in HepG-2 cells, but WSG treatment inhibited T0901317-mediated lipid accumulation. In addition, WSG downregulated T0901317-mediated expression of SREBP-1c, ACC, FAS and SCD-1 protein. In addition, WSG increased the phosphorylation level of LKB1 and AMPK. Compound C treatment blocked WSG-mediated downregulation of SREBP-1c protein. In conclusion, WSG is considered to inhibit the accumulation of lipids and triglycerides in HepG-2 cells by inducing the activation of LKB1 and AMPK successively, thereby reducing the expression of FAS, ACC, and SCD-1 through suppression of SREBP-1c expression. - COLLAPSE
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    1 February 2023

  • Research Article

    The Vascular Plants of Forested Wetland in Daegu-Gyeongbuk, Korea- Focused on Daegu, Cheongdo, Gyeongju and Pohang -

    대구, 경북지역 산림습원 일대의 관속식물상- 대구, 청도, 경주, 포항을 중심으로 -

    Myung Hoon Yi, Sung Tae Yoo, Byung Do Kim, Jung Won Yoon, Jong Bin An, Hye Yeon Kwon

    이명훈, 유성태, 김병도, 윤정원, 안종빈, 권혜연

    To investigate the distribution of vascular plants growing at Wetland in Daegu･Gyeongbook, we surveyed from June 2020 to October in 2021. The … + READ MORE
    To investigate the distribution of vascular plants growing at Wetland in Daegu･Gyeongbook, we surveyed from June 2020 to October in 2021. The flora of wetland was classified as a total of 459 taxa comprising of 104 families, 286 genus, 406 species, 12 subspecies, 34 varieties, 6 forma, 1 hybrid. Among them, the rare plants species 5 taxa, endemic plants 11 taxa, floristic regional indicator plants 57 taxa, naturalized plants 27 taxa and wetland plants 74 taxa were recorded. The percentage of urbanization index was 8.44%, the naturalized ratio was 5.88%, respectively. - COLLAPSE
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    1 February 2023

  • Research Article

    Flora of Mt. Balbaek (Gyeongbuk, Gyeongsan)

    발백산(경북, 경산)의 관속식물상

    Youjin Hwang, SeongJun Park, SuMi Choi, Saeyeon Hwang, Jaesik Hwang, Seonghyun Bae, SeonJoo Park

    황유진, 박성준, 최수미, 황새연, 황재식, 배성현, 박선주

    This study was conducted to study the vascular plants of Balbaeksan, located on the border between Gyeongsan-si and Cheongdo-gun, Gyeongsangbuk-do. It was … + READ MORE
    This study was conducted to study the vascular plants of Balbaeksan, located on the border between Gyeongsan-si and Cheongdo-gun, Gyeongsangbuk-do. It was performed 13 times from September 2020 to November 2021, and the investigated vascular plants were identified as a total of 93 families, 302 genera, 485 species, 10 subspecies, 40 varieties, 13 varieties, and 545 taxa. Endemic plants were investigated in 18 taxa, 9 taxa of rare plants; Vulnerable (VU) 5 taxa, Least concerned (LC) 3 taxa, Data Deficient (DD) 1 taxa, Red List plants 5 taxa; 3 taxa of least concerned (LC), 2 taxa of Not Evaluated (NE), 183 taxa of biological resources subject to export approval, 78 taxa of specific taxonomy; There were 9 taxa of grade IV, 20 taxa of grade III, 20 taxa of grade II, and 28 taxa of grade I. 4 taxa of plants subject to climate change adaptation; 2 taxa of endemic plants, 1 taxa of southern plants, 1 taxa of northern plants, 4 taxa of climate change biomarker species, 2 taxa of candidate species of climate change biomarker, 65 taxa of exotic plants, and 3 taxa of ecosystem disturbance species. Plants 235 taxa (43.1%), medicinal plants 257 taxa (47.2%), ornamental plants 148 taxa (27.2%), woody plants 54 taxa (9.9%), herbaceous plants 37 taxa (6.8%), industrial plants 15 Taxa (2.8%), 11 taxa (2.0%) of fiber-bearing plants, and plants of unknown use were identified as 73 taxa (13.4%). The flora of Mt. Balbaek was investigated for the first time, and plants to be preserved in order to secure useful plant resources and biological sovereignty were identified. So continuous monitoring is necessary to prevent the introduction of foreign plants that may be caused by the recent increase in the number of people coming and going. - COLLAPSE
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    1 February 2023

  • Research Article

    Plus Tree Selection of Black Locust (Robinia pseudoacacia L.) for Tree Improvement of Timber Characteristics

    국내 아까시나무의 용재 특성 향상을 위한 우량개체 선발

    Tae-Lim Kim, Hyemin Lim, Kyungmi Lee, Changyoung Oh, Il Hwan Lee, Hwan Su Hwang

    김태림, 임혜민, 이경미, 오창영, 이일환, 황환수

    Plus tree selection is the essential first step in a tree improvement program. This study was carried out to select plus trees … + READ MORE
    Plus tree selection is the essential first step in a tree improvement program. This study was carried out to select plus trees of black locust (Robinia pseudoacacia L.) for tree improvement in Korea. The candidate plus trees of black locust were selected from twenty-one places in the four provinces (Gangwon, Gyeonggi, Chungcheong and Gyeongsang) following comparison selection. The trees were examined for qualitative and quantitative traits of economic interest like tree height (H), diameter at breast height (DBH), clear bole height (CBH), stem straightness (SS), crown size (CS) and disease resistance. The 64 selected trees showed higher quality in growth characteristics than control trees. Average of height, DBH, CBH, SS and CS were 20.5 m, 31.1 ㎝, 10.1 m, 1.2 and 5.2 m respectively. In particular, it was shown that the growth characteristics were higher in Chungcheong population. The superiority percentage of selected candidate plus trees of black locust over their respective check trees ranged from 7.3% to 18.9% in height, 20.0% to 40.6% in DBH, 32.8% to 73.5% in CBH, 42.9% to 55.2% in SS and -11.1% to 9.4% in CS, respectively. The selected black locust will be useful in future tree breeding programs based on their clonal and progeny performance. - COLLAPSE
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    1 February 2023

  • Research Article

    Pytotoxicity by Continuous Spraying of Fruit Fire Blight Disinfectant During Growing Season of Apple and Pear

    과수 화상병 방제약제의 사과·배 생육기 연용 살포에 의한 약해

    Se Hee Kim, Song-Hee Ryu, Byeonghyeon Yun, Kang Hee Cho, Sang-Yun Cho, Jung Gwan Park

    김세희, 류송희, 윤병현, 조강희, 조상윤, 박정관

    In order to control the fire blight disease, all plants within the radius of the diseased orchard were removed in the early … + READ MORE
    In order to control the fire blight disease, all plants within the radius of the diseased orchard were removed in the early stage of the outbreak, or antibiotics control was performed for prevention. Since the beginning of antibiotics use on plants, the potential for development of resistance to antibiotics by the plant pathogen and unintended detrimental effects on the fruit trees and environment has become a problem. The purpose of this study is to determine the degree of phytotoxicity to fruit trees caused by excessive spraying of the fire blight disease disinfectant and to establish basic data for safe disinfectant guide. We analyzed whether damage to the fruit tree and the maximum residual limit of fruit was exceeded when three kinds of the fire blight disease disinfectants were continuously sprayed in excess of the number of safe use during the growing season. There was no phytotoxicity in apple ‘Fuji’ and pear ‘Niitaka’, and oxolinic acid was detected beyond the limit of quantitation in 'Fuji' grown without a bag, and the other disinfectants were detected below the maximum residue limit. When these disinfectants are continuously sprayed in excess of the number of safe, phytotoxicity may remain on the fruit. Therefore, it is necessary to observe the prescribed dilution factor and observe the safe frequency and the timing of use. - COLLAPSE
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    1 February 2023
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