“”에 대한
게시판
결과는 총 13,050건 입니다.
게시판 (13,050)
-
RE: [현상태 진단 및 관리법 문의] 촛불 맨드라미
2024-12-09
안녕하세요. 국립세종수목원 반려식물 상담실을 이용해 주셔서 감사합니다.
HOME > 마이페이지 > 활동내역 > 반려식물 Q&A 제출내역
-
The complete chloroplast genomes of Allium sacculiferum, A. thunbergii, and A. taquetii (Amaryllidaceae) from Korea
2024-06-04
Abstract : The genus Allium comprises some of the most commonly consumed food crops worldwide. The chloroplast genomes of A. sacculiferum, A. thunbergii, and A. taquetii are 152,444, 153,459, and 154,056 bp circular molecular genomes, respectively. The annotation results revealed the presence of 132 (89 protein-coding, 35 tRNA, and eight rRNA), 132 (86 protein-coding, 38 tRNA, and eight rRNA), and 132 (86 protein-coding, 38 tRNA, and eight rRNA) genes with 36.78%, 36.83%, and 36.88% total GC content in each genome, respectively. The chloroplast genome of each Allium species contains an 81,254, 82,473, and 83,068 bp LSC region, an 18,176, 18,006, and 17,958 bp SSC region, and a pair of 26,507, 26,490, and 26,515 bp IR regions, respectively. Phylogenetic analysis based on the 21 complete chloroplast genomes indicates that A. sacculiferum is closely related to A. koreanum; A. thunbergii and A taquetii are closely related to A. hookeri. This study shows that the three Allium species are Korean crop wild relatives that may be used to develop new Allium varieties in the future.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
-
Cloning and Characterization of Cellulase from Paenibacillus peoriae MK1 Isolated from Soil
2024-06-04
Abstract : An isolated bacterium from soil that highly hydrolyzes cellulose was identified as Paenibacillus peoriae and named P. peoriae MK1. The cellulase from P. peoriae MK1 was cloned and expressed in Escherichia coli. The purified recombinant cellulase, a soluble protein with 13.2-fold purification and 19% final yield, displayed a specific activity of 77 U/mg for CM-cellulose and existed as a metal-independent monomer of 65 kDa. The enzyme exhibited maximum activity at pH 5.0 and 40 °C with a half-life of 9.5 h in the presence of Ca2+ ion. The highest activity was observed toward CM-cellulose as an amorphous substrate, followed by swollen cellulose, and sigmacell cellulose and α-cellulose as crystalline substrates. The enzyme and substrate concentrations for the hydrolysis of CM-cellulose were optimized to 133 U/mL and 20 g/L CM-cellulose, respectively. Under these conditions, CM-cellulose was hydrolyzed to reducing sugars composed mostly of oligosaccharides by cellulase from P. peoriae MK1 as an endo-type cellulase with a productivity of 11.1 g/L/h for 10 min. Our findings will contribute to the industrial usability of cellulase and the research for securing cellulase sources.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
-
Vegetation cover is a crucial key to the success of ecological restoration in the desertified steppe of Inner Mongolia
2024-09-20
Abstract : In this study, we analyzed the environmental factors influencing the restoration process of the degraded ecosystem in the Inner Mongolian steppe, the largest steppe ecosystem in Asia, which is experiencing rapid desertification, and evaluated the effects of restoration on the damaged ecosystem in China. For this purpose, we selected degraded steppe areas left to desertification in the Hulunbuir region, four restored sites where vegetation was artificially introduced for restoration, and reference ecosystems, including a non-desertified area with the dominant Pinus sylvestris var. mongolica community and a meadow steppe area. We conducted analyses and monitoring of plant community characteristics and soil environmental factors to assess the progress of restoration. The results showed that the introduction of indigenous woody plants in the degraded areas led to a proportional increase in vegetation cover, plant biodiversity, and species abundance over time. The primary external forces driving the succession of vegetation in the restored sites were soil factors including organic matter content, temperature and total nitrogen levels, which were associated with an increase in vegetation cover. These results can be interpreted as an increase in vegetation cover leading to an increase in litter production. This in turn reduces soil temperature and evaporation, subsequently enhancing the activity of soil microorganisms. Over time, the species composition, structural diversity of communities, and ecosystem functions in the restored sites gradually became more similar to those of the reference ecosystems. This indicates that vegetation restoration in this area has been very successful. In particular, the positive change in local residents' awareness regarding the necessity of restoration has been considered a crucial contribution to the success of restoration in the degraded areas. It has led to a decrease in perceived anthropogenic threats to the restored sites. These results indicate that the introduction of native woody plants is crucial and can increase vegetation cover and species composition complexity and local residents' positive perception of restoration for the successful restoration of desertified drylands.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
-
Differences in climate and drought response of the exotic plantation species Abies firma, Cryptomeri
2021-05-11
ABSTRACT Exotic species plantations are increasing for timber production and other economic benefits. However, evaluation of species adaptation to local climates requires long-term research and the information is still limited. This study was conducted to understand the growth response of three exotic tree species, Abies firma, Cryptomeria japonica , and Chamaecyparis obtusa , to regional moisture conditions during the dry spring and wet summer in plantations located in south-central Korea. We examined the growth response of A. firma, C. japonica, and C. obtusa to monthly precipitation and drought indices from 1950 to 1998 using tree-ring analysis. The radial growth o f A. firma showed a significantly positive relationship with precipitation and drought indices in spring (p C. japonica and C.obtusa, with indeterminate growth, had negative correlations with precipitation and drought indices in summer (p C. japonica and C. obtusa. The different responses of these species to monthly precipitation and drought indices imply that regional precipitation patterns should be carefully considered in species selection for the establishment of exotic species plantations.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
-
2021년 11월 법인카드 모니터링 사용내역
2021-12-30
2021년 11월 법인카드 모니터링 사용내역입니다.
HOME > 사전정보공표 > 인사·총무·회계
-
Antioxidant activity of ten Lamiaceae plant seed extracts
2022-12-23
Abstract: This study explored plant-derived natural antioxidants by evaluating the antioxidant activity of Lamiaceae plant seed extracts. Plants with the percentage of filled seeds at or above 90% and seed germination at or above 50% were selected. Of the ten species studied, the total phenolic content of the seeds was high in the species Phlomis umbrosa Turcz. (6.2 mg GAEs/g of seeds) and Elsholtzia ciliata (Thunb.) Hyl. (4.5 mg GAEs/g of seeds). The total flavonoid content of the seeds was high in E. ciliata (1.0 mg QEs/g of seeds) and P. umbrosa (0.6 mg QEs/g of seeds). Based on the EC50 value of the seed extracts, 2,2-diphenyl1-picrylhydrazyl radical scavenging activity was high in the seeds of the plants E. ciliata (27.5 µg/mL), Mosla dianthera (Buch.- Ham. ex Roxb.) Maxim. (29.2 µg/mL), and Prunella vulgaris var. lilacina Nakai (33.3 µg/mL). In addition, 2,2'-Azino-bis(3- ethylbenzothiazoline-6-sulfonic acid) radical scavenging activity was high in P. vulgaris var. lilacina (25.6 µg/mL), E. ciliata (25.9 µg/mL), and M. dianthera (27.6 µg/mL) seeds. The ferric reducing antioxidant power of the seed extracts was high in P. vulgaris var. lilacina (2910.4 µM Fe(II)/g of extract), E. ciliata (2836.2 µM Fe(II)/g of extract), and M. dianthera (2754.4 µM Fe(II)/g of extract). According to the cluster analysis based on antioxidant activity, the seeds of the ten species were classified into three groups, from group 1 with low antioxidant activity to group 3 with high antioxidant activity; E. ciliata, M. dianthera, and P. vulgaris var. lilacina were classified as group 3.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
-
돔 가든에서의 저강도 활동이 심혈관계 스트레스 반응에 미치는 영향
2022-12-23
요약 : 본 연구는 돔 가든에서의 저강도 활동이 심혈관계 스트레스 반응에 미치는 영향을 측정하기 위해 수행되 었다. 실험은 한국의 대표적인 온실형 정원이 있는 국립세종수목원의 사계절온실에서 진행되었고, 대조실험은 수 목원에서 인접한 도심지인 세종시 나성동에서 실시하였다. 피험자는 20-30대 사이의 건강한 성인 남자 17명(평균나 이 29.7±4.2세)로 선정하였고, 실험은 within group으로 진행하여 두 장소를 비교하였다. 피험자는 도심지와 돔 가든 에서 각각 1회 15분씩 산책을 하였고, 실험은 두 장소에 무작위 배치하였다. 스트레스 반응을 평가하기 위해 생리평 가의 측정지표로 HRV와 혈압 그리고 맥박수를 사용하였고, 환경인식변화와 불안수준 변화를 알아보기 위해 경관 인상평가도구인 'SD'와 상태불안평가도구인 'STAI'를 이용하였다. 실험결과 도심지에 비해 돔 가든에서 산책을 했 을 때 생리적 효과 부분에서 부교감신경 지표인 HF 수치가 증가하고, 교감신경 지표인 LF/HF의 감소가 일어났으 며 수축기혈압에서 통계적으로 유의한 감소를 보였다. 도심지보다 돔 가든에서의 산책활동 시 'SD' 지표에서 하위 척도 9개 모두 유의하게 높게 나타났으며,'STAI' 평가에서 불안을 유의하게 낮춰주는 것으로 나타났다. 이러한 결과 는 대형 돔 가든에서의 저강도 활동은 생리적으로 안정적인 상태를 만들어줄 뿐만 아니라 심리적으로도 스트레스 를 완화시켜준다고 할 수 있다. 이는 대형 온실 정원이 건강증진을 위한 공간으로도 사용될 수 있음을 보여준다.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
-
Effects of Sources and Quality of LED Light on Response of Lycium chinense of Photosynthetic Rate
2020-05-26
Abstract Smart farm is a breakthrough technology that can maximize crop productivity and economy through efficient utilization of space regardless of external environmental factors. This study was conducted to investigate the optimal growth and physiological conditions of Chinese matrimony vine (Lycium chinense) with LED light sources in a smart farm. The light source was composed of red+blue and red+blue+white mixed light using a LED system. In the red+blue mixed light, red and blue colored LEDs were mixed at ratios of 1 : 1, 2 : 1, 5 : 1, and 10 : 1, with duty ratios varied to 100%, 99%, and 97%. The experimental results showed that the photosynthetic rate according to the types of light sources did not show statistically significant differences. Meanwhile, the photosynthetic rate according to the mixed ratio of the red and the blue light was highest with the red light and blue LED ratio of 1 : 1 while the water use efficiency was highest with the red and blue LED ratio of 2 : 1. The photosynthetic rate according to duty ratio was highest with the duty ratio of 99% under the mixed light condition of red +blue+white whereas the water use efficiency was highest with the duty ratio of 97% under the mixed light of red+blue LED. The results indicate that the light source and light quality for the optimal growth of Lycium chinense in the smart farm using the LED system are the mixed light of red+blue (1 : 1) and the duty ratio of 97%.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
-
소백산국립공원 삼가지구 관속식물의 고도별 분포패턴
2021-05-11
요약 소백산국립공원 삼가지구 관속식물의 고도별 수직분포 및 분포변화를 파악하기 위해 삼가탐방지원센터(400 m)에서 정상(1,439 m)까지 해발 100 m 단위로 등분하여 11개 구간에 대한 식물목록을 작성하였다. 현지조사를 실시한 결과 92과 235속 332종 3아종 37변종 3품종 총 375분류군이 출현하였다. 구간별 식물 종다양성 패턴을 분석한 결과, 고도가 증가함에 따라 점차 종다양성이 감소하다가 특정구간에서 증가하는 역단봉형 패턴이 나타났다. 고도에 따른 종 분포패턴과 치환성 양이온 Ca 2+ , Mg 2+ 와 토양 pH, 유효인산, 온량지수, 조사면적 등의 환경요인이 양의 상관관계를 보였고 경사, 토양 수분, 치환성 양이온 Na 2+ 이 음의 상관관계를 보였다. DCA 분석 기법을 이용하여 구간별 식분의 분포를 분석한 결과 Ⅰ,Ⅱ축 상에서 2개의 그룹으로 구분되었다. 구간별 식분의 배치는 400∼500 m 구간부터 1400∼1500 m 구간까지 순차적으로 배열되었다. 이러한 식분의 배치에 영향을 미치는 환경요인은 토양 수분, pH, K 2+ , Na 2+ , 유효인산, 경사도 등 토양 및 지형적 요인으로 나타났다. 생물다양성 보전, 지속가능한 이용에 있어서 본 연구 결과는 중요한 기초자료로서 역할을 할 것으로 기대되며, 식물종들의 생태·환경적 특징과, 분포범위를 파악하기 위해서는 지속적인 모니터링과 함께 관련 연구들을 지속적으로 발전시켜야 할 것이다.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
이 누리집은 산림청 산하 공공기관 누리집입니다.
