• Research Article

    Analysis of Amino Acid Composition of Domestic Cassava (Manihot esculenta) Stems and Leaves According to Harvest Time

    수확 시기에 따른 국내산 카사바(Manihot esculenta) 잎과 줄기의 아미노산 조성 분석

    Sanggon Ko, Ki Hwan Nam, Seoung Kwan Jeong, Joonsoo Bae, Eunbi Oh, Suyeon Gu, Seungwha Jo, Yun-Hee Park, Ho-Seok Jeong, Young Hee Kwon, Kyungmi Mun, Chang-Min Yang

    고상곤, 남기환, 정승관, 배준수, 오은비, 구수연, 조승화, 박윤희, 정호석, 권영희, 문경미, 양창민

    Due to the stems and leaves of cassava were usually thrown away or burned, and various studies were being conducted to utilize … + READ MORE
    Due to the stems and leaves of cassava were usually thrown away or burned, and various studies were being conducted to utilize them as feed for animals. Theretofore, in this study, the amino acid composition of cassava stems and leaves were analyzed to explore ways to utilize. The amino acid composition was analyzed conducted according to harvesting time, and the amino acid composition was found to be different depending on the monthly harvest. Both leaves and stems had high glutamic acid content, and leaves in particular had a higher amino acid content than stems. The results of this study are expected to be used in the development of animal feed additives in the future. However, the results of this study require further research because only samples of a single cassava variety were used, and diversity in growing areas was lacking. - COLLAPSE
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    1 October 2024

  • Research Article

    Optimization of Extraction Conditions for Verbascoside and Rutin from Abeliophyllum distichum Nakai. Leaf Using Response Surface Methodology

    반응표면분석법을 이용한 미선나무 잎의 verbascoside 및 rutin 추출 조건 최적화

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

    최대호, 강정목, 정은숙, 박용우

    This study was conducted using response surface analysis to confirm the optimal extraction conditions for efficient supply of verbascoside and rutin, which … + READ MORE
    This study was conducted using response surface analysis to confirm the optimal extraction conditions for efficient supply of verbascoside and rutin, which are indicator components of Abeliophllum distichum Nakai., which is being developed as a resource plant. An experiment was performed on 17 sections using hot air dried leaves of A. distichum by setting three independent variables (ethanol concentration, extraction time, extraction temperature) and the contents of verbascoside and rutin were measured. The optimal extraction conditions for verbascoside were 60% ethanol concentration, 14.4 h extraction time, and 75°C extraction temperature. The expected value of verbascoside under optimal extraction conditions was 193.92 ㎎/g, and the experimental value was 193.66±4.37 ㎎/g. The optimal extraction conditions for rutin were 52% ethanol concentration, 30 h extraction time, and 75°C extraction temperature. The expected rutin content under optimal extraction conditions was 13.67 ㎎/g, and the value obtained through the actual experiment was 14.38±0.31 ㎎/g. It was confirmed that verbascoside and rutin could be efficiently secured through optimal extraction conditions derived by response surface analysis. - COLLAPSE
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    1 October 2024

  • Research Article

    Inhibitory Effect of Nicotiana debneyi against the Melanogenesis

    야생종 담배 추출물(Nicotiana debneyi)의 멜라닌생성 억제효과

    Sang Hun Lee, Song-Yi Park, Jeong Won Choi, Hyeok Jin Choi, So Jung Park, Jin Hyuk Hwang, Jeong Heon Lee, Kwang Chul Kim, Cheol Bin An, Jin Boo Jeong

    이상훈, 박송이, 최정원, 최혁진, 박소정, 황진혁, 이정헌, 김광철, 안철빈, 정진부

    This study aimed to evaluate the potential use of 50% ethanol extract from the aerial parts of N. debneyi (ND50E) as a … + READ MORE
    This study aimed to evaluate the potential use of 50% ethanol extract from the aerial parts of N. debneyi (ND50E) as a whitening cosmetic ingredient by assessing its inhibitory activity on melanin production. The results demonstrated that ND50E significantly suppressed both extracellular and intracellular melanin production. Additionally, ND50E had no effect on the expression of tyrosinase mRNA, but it significantly reduced the protein level of tyrosinase. These findings suggest that ND50E inhibits melanin production by decreasing the protein level of tyrosinase. Therefore, ND50E holds significant potential as an effective melanin production inhibitor for use in whitening cosmetic formulations. - COLLAPSE
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    1 October 2024

  • Research Article

    Vegetation Structure of Mt. Bangtae among Protected Area for Forest Genetic Resource Conservation

    산림유전자원보호구역 방태산의 식생구조

    Byeong Joo Park, Tae Im Heo

    박병주, 허태임

    This study aims to analyze the vegetation structure of the forest in Mt. Bangtae, a domestic forest genetic resource conservation area and … + READ MORE
    This study aims to analyze the vegetation structure of the forest in Mt. Bangtae, a domestic forest genetic resource conservation area and belonging to the WDPA, in order to provide basic data for conservation strategies and efficient management. A total of 55 survey plots were established and surveyed using the Braun-Blanquet method. The vegetation communities were classified into 4 clusters: Acer pseudosieboldianum-Acer pictum subsp. mono community (C1), Quercus mongolica community (C2), Abies nephrolepis community (C3), and Sasa borealis-Acer pseudosieboldianum community (C4). Statistical significance was recognized in environmental factors between clusters except for TPI(Topographic Position Index), confirming that each cluster possesses unique topographical characteristics. Species composition analysis revealed that Acer sp. such as A. pseudosieboldianum and A. pictum subsp. mono were growing in the valley, while subalpine woody plants such as Abies nephrolepis and Betula ermanii were evenly distributed. The Mt. Bangtae, genetic resource conservation area appeared in subalpine and temperate vegetation. Consequently, the distinct clustering of vegetation based on complex environmental factors suggests a patch mosaic distribution of vegetation. It is anticipated that ecotones between vegetation patches in the Mt. Bangtae, forest genetic resource conservation area are widely distributed, indicating a richness of biodiversity and maintaining a healthy forest ecosystem through ecosystem cycling. Therefore, continuous monitoring and observation of vegetation changes are necessary to formulate conservation strategies in the future. - COLLAPSE
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    1 October 2024

  • Research Article

    The Floristic Inventory and Distribution Characteristics of Vascular Plants in the Forest Restoration Post-monitoring Site

    산림생태복원 사후모니터링 대상지에 분포하는 관속식물 목록 및 분포 특성

    Jong-Won Lee, Tae-Woon Kim, Joon-Hyung Park, Young-Sub Han, Jun Hwang, Seong-Ho Lee, Taechul Hur, Chae-Young Lim

    이종원, 김태운, 박준형, 한영섭, 황준, 이성호, 허태철, 임채영

    This study carried out a survey targeting 150 post-monitoring sites for forest ecological restoration in order to use them as basic data … + READ MORE
    This study carried out a survey targeting 150 post-monitoring sites for forest ecological restoration in order to use them as basic data to maintain and improve forest biodiversity and the effectiveness of native plants for forest restoration. The survey was conducted once or twice per season from April 2020 to October 2023. The vascular flora of 150 post-monitoring sites for forest ecological restoration in Korea was identified as 1,317 taxa in 139 families, 599 genera, 1,171 species, 27 subsp., 92 var., 11 f., 11 hybrids, and 5 cultivar. The total survey area of 150 locations is about 5.7 ㎢, which is only 0.009% of Korea’s total forest area of 62,860 ㎢, but 27.9% of the 4,724 taxa of vascular plants in the Korean Peninsula were found to have appeared. Remarkable plants include, Drosera peltata Thunb. var. nipponica (Masam.) Ohwi, 1 taxon for endangered wild species, 47 taxa for rare plants and red list plants, 55 taxa for plants endemic to the Korean Peninsula, and a total of 324 taxa for floristic target plants. 123 taxa of exotic plants were identified, and the average naturalization rate and urbanization index of the forest restoration area was calculated to be 9.3% and 29.3%. In the forest restoration post-monitoring site, 89 taxa of native plants for forest restoration were identified. - COLLAPSE
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    1 October 2024

  • Research Article

    Optimizing Gamma-ray Dosages for Enhanced Growth and Quality of Yacon Mutant Progeny

    야콘 돌연변이체 후대의 생육과 품질 향상을 위한 최적 감마선 선량 구명

    Su Jeong Kim, Hwang Bae Sohn, Jung Hwan Nam, Ye Jin Lee, Do Yeon Kim, Su Hyoung Park, Jong Nam Lee, Dong Chil Chang, Yul Ho Kim

    김수정, 손황배, 남정환, 이예진, 김도연, 박수형, 이종남, 장동칠, 김율호

    Yacon (Samallanthus sonchifolius (Poepp. & Endl.) H. Robinson), a member of the Andean root crops (including potato and sweet potato) renowned … + READ MORE
    Yacon (Samallanthus sonchifolius (Poepp. & Endl.) H. Robinson), a member of the Andean root crops (including potato and sweet potato) renowned for its sweet taste and crisp texture, has gained popularity owing to its high fructooligosaccharides content. Although gamma-ray mutagenesis has been utilized to develop breeding resources with novel characteristics, research on the radiation sensitivity of yacon remains limited. Therefore, this study aims to determine the optimal gamma-ray dosage for mutation breeding in yacón. Crown and green buds of yacon were exposed to gamma rays (20~80 Gy) and subsequently planted in a field. The median lethal doses for crown and green buds were 22.4 and 36.6 Gy, respectively. The aboveground characteristics of early generation (M1) included reduced plant height and leaf stem weight, resulting in a plant canopy highly adaptable to dense planting. Additionally, cracking of underground parts was notably reduced, thus improving quality characteristics. In the mutant descendant generation (M8), plant height remained similar to that of the original species or showed a decreasing trend; however, stem and leaf numbers along with leaf stem weight increased compared with the original species. The total tuber yield was 4,300 and 4,251 ㎏/10a under 20 and 40 Gy treatments, representing an increase of 12.7% and 11.4%, respectively, compared with the original species (3,817 ㎏/10a). After considering growth and quality factors, gamma-ray doses within the 20~40 Gy range were found optimal for selecting useful mutant lines in yacón. These mutants could contribute in developing a new yacón variety with high fructooligosaccharides content and long-term storage capabilities. - COLLAPSE
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    1 October 2024

  • Research Article

    Characteristic Analysis of Useful Plant Resources for Phytoremediation in Polluted Environments

    오염지 환경복원 소재 개발을 위한 유용 식물자원 특성 평가

    Kyong-Hee Nam

    남경희

    This study analyzed the growth, heavy metal accumulation, and inorganic component characteristics of seven plant species growing naturally in an abandoned mine … + READ MORE
    This study analyzed the growth, heavy metal accumulation, and inorganic component characteristics of seven plant species growing naturally in an abandoned mine contaminated with heavy metals to develop effective plant resources for phytoremediation in polluted environments. The plant height of all species except for Artemisia princeps decreased in the polluted environment, while the dry weight did not decrease. In particular, the dry weight of Erigeron annuus increased 1.2 ~ 2.3 times more in plants grown in contaminated soil. The underground accumulation of arsenic, a toxic heavy metal, was high (94.3 to 136.7 mg kg-1) in Conyza canadensis, Aster koraiensis, and Artemisia princeps. However, the translocation coefficient from the roots to the above-ground was less than 1 in all plants, indicating that most absorbed arsenic accumulated underground. In contrast, the accumulation of zinc was high in Plantago asiatica, Aster koraiensis, and Conyza canadensis, and most of the translocation coefficients were above 1, showing a high degree of transfer to the above-ground part. In most plants, the concentrations of nitrogen, phosphorus, potassium, and calcium are higher in above-ground parts than underground. Conversely, sodium concentration is higher underground. - COLLAPSE
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    1 October 2024

  • Research Article

    Light-shading Effect on the Growth Performance, Leaf Morphological Characteristics and Chlorophyll Content of Myrica rubra Seedlings

    소귀나무 유묘의 생장, 잎 형태적 특성 및 엽록소 함량에 대한 차광 효과

    Hye Young Yun, Hyeongju Kim, Sim-Hee Han, Eun-Young Yim

    윤혜영, 김형주, 한심희, 임은영

    This study attempted to present the most appropriate light conditions of Myrica rubra. The light-shading treatment was divided into 0%(control), 35%, … + READ MORE
    This study attempted to present the most appropriate light conditions of Myrica rubra. The light-shading treatment was divided into 0%(control), 35%, 50%, and 75%, and after growing for six months, growth performance, leaf shape characteristics, and photosynthetic pigment content were investigated. The relative growth rate of the height was the highest in the 35% light-shading treatment and the lowest in the control, but the stem and root dry weight were the highest in the control and the lowest in the 75% light-shading treatment. The number of branches was also the highest in the control, and the 55% light-shading treatment was the least. The leaves of M. rubra were the smallest and thickest in the control, and the leaf area widened with an increase in the light-shading rate, and the thickness decreased. Chlorophyll a, b, and total chlorophyll content were highest in the 35% light-shading treatment and lowest in the 75% light-shading treatment. The carotenoid content was highest in the control and lowest in the 75% light-shading treatment. Therefore, it is judged that the appropriate light conditions for the M. rubra are the most appropriate to have less chlorophyll destruction and 35% light-shading conditions that can sustain stem growth and biomass. - COLLAPSE
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    1 October 2024
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