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게시판 (13,048)
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RE: 장미허브 잎이 노랗게 변하는 현상
2025-05-28
HOME > 마이페이지 > 활동내역 > 반려식물 Q&A 제출내역
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스타트필름 상담 요청드려요!
2025-05-21
1. 식물 상담 분류를 오른쪽 괄호 안에 기입해 주세요 . ( 3 ) ① 식물 이름 ②식물 병해충 ③ 식물 관리법 ④ 기타 2. 식물의 분류를 오른쪽 괄호 안에 기입해 주세요. ( 1) ① 초본 ②목본 3. 키우는 장소를 오른쪽 괄호 안에 기입해 주세요. ( 2 ) ① 베란다 ②실내 ③ 실외 4. 물주는 시기를 오른쪽 괄호 안에 기입해 주세요 . (4 ) ① 1회/일 ② 2회/일 ③ 1회/주 ④ 기타 5. 물주는 방법을 오른쪽 괄호 안에 기입해 주세요. ( 1 ) ① 흙이 충분히 젖도록 ②흙겉만 젖게 6. 식물의 증상(부위 작성)을 작성해 주세요. →스타트필름을키우고있는데,꽃도잘피우고새잎도잘납니다.잎이나고서시간이흐르면사진과같이말라버리는데어떻게해야하나요?
HOME > 마이페이지 > 활동내역 > 반려식물 Q&A 제출내역
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The Removal Efficiencies of Several Temperate Tree Species at Adsorbing Airborne Particulate Matter
2020-05-26
ABSTRACT Although urban trees are proposed as comparatively economical and eco-efficient biofilters for treating atmospheric particulate matter (PM) by the temporary capture and retention of PM particles, the PM removal effect and its main mechanism still remain largely uncertain. Thus, an understanding of the removal efficiencies of individual leaves that adsorb and retain airborne PM, particularly in the sustainable planning of multifunctional green infrastructure, should be preceded by an assessment of the leaf microstructures of widespread species in urban forests. We determined the differences between trees in regard to their ability to adsorb PM based on the unique leaf microstructures and leaf area index (LAI) reflecting their overall ability by upscaling from leaf scale to canopy scale. The micro-morphological characteristics of adaxial and abaxial leaf surfaces directly affected the PM trapping efficiency. Specifically, leaf surfaces with grooves and trichomes showed a higher ability to retain PM as compared to leaves without epidermal hairs or with dynamic water repellency. Zelkova serrata (Thunb.) Makino was found to have significantly higher benefits with regard to adsorbing and retaining PM compared to other species. Evergreen needle-leaved species could be a more sustainable manner to retain PM in winter and spring. The interspecies variability of the PM adsorption efficiency was upscaled from leaf scale to canopy scale based on the LAI, showing that tree species with higher canopy density were more effective in removing PM. In conclusion, if urban trees are used as a means to improve air quality in limited open spaces for urban greening programs, it is important to predominantly select a tree species that can maximize the ability to capture PM by having higher canopy density and leaf grooves or trichomes .
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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Hydrolysis of the outer β-(1,2)-d-glucose linkage at the C-3 position of ginsenosides by a commercia
2020-05-26
ABSTRACT Commercial b-galactosidase from Aspergillus oryzae (SUMILACT L TM ) was used for the bioconversion of the ginsenosides Rb1, Rb2, Rc, Rd, and Rg3 to gypenoside-XVII, compound-O, compoundMC1, F2, and Rh2, respectively. The optimal conditions were pH 4.5, 50 C, 60 U·mL -1 enzyme, and 8.0 mM substrate. Interestingly, the enzyme hydrolyzed only the outer b-(1,2)-D-glucose linkage at the C-3 position of ginsenosides. Under optimum conditions, the enzyme completely converted Rb1, Rb2, Rc, Rd, and Rg3 to gypenoside-XVII, compound-O, compound-MC1, F2, and Rh2, respectively, with the highest productivity.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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Production of 8S- and 10S-hydroxy polyunsaturated fatty acids by recombinant Escherichia coli cells
2020-05-26
ABSTRACT Objective To quantitatively hydroxylate 8S- and 10S-positions on polyunsaturated fatty acids by recombinant Escherichia coli cells expressing mouse arachidonate 8S-lipoxygenase (8S-LOX). Results Hydroxylated products gained from the conversion of arachidonic acid (20:4 D5Z,8Z,11Z,14Z , AA), eicosapentanoic acid (20:5 D5Z,8Z,11Z,14Z,17Z , EPA), and (22:6 D4Z,7Z,10Z,13Z,16Z,19Z , DHA) by recombinant E. coli cells containing 8S-LOX from mouse were identified as 8S-hydroxy-5,9,11,14(Z,E,Z,Z)-eicosatetranoic acid (8S-HETE), 8S-hydroxy-5,9,11,14,17(Z,E,Z,Z,Z)-eicosapentanoic acid (8S-HEPE), and 10S-hydroxy-4,8,12,14,16,19(Z,E,Z,Z, Z,Z)-docosahexaenoic acid (10S-HDoHE), respectively. Under the optimal hydroxylation conditions of pH 7.5, 30 °C, 5% (v/v) ethanol, 15 g cells l -1 , and 5 mM substrate, AA, EPA, and DHA were hydroxylated into 4.37 mM 8S-HETE, 3.77 mM 8S-HEPE, and 3.13 mM 10S-HDoHE for 60, 90, and 60 min, with 87, 75, and 63% molar conversions, respectively. Conclusion To the best of our knowledge, this is the first quantitatively biotechnological production of 8S-HETE, 8S-HEPE, and 10S-HDoHE.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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The flora of land plants (bryophytes and vascular plants) in Wangpicheon Ecosystem and Landscape Con
2021-05-11
ABSTRACT This study presents the flora of nonvascular plants (bryophytes) and vascular plants within the Wangpicheon Ecosystem and Landscape Conservation Area in Korea. The time of the survey was divided into four seasons. The fieldwork was conducted for a total of 18 days from November of 2016 to October of 2017. The land plants in the Wangpicheon conservation area were identified as 758 taxa with 164 families, 455 genera, 698 species, 10 subspecies, 47 varieties and 3 forms. Among them, bryophytes amounted to 122 taxa and vascular plants numbered 636 taxa. Native plant amounted to 693 taxa. In total, there are 113 floristic target species in Korea, including one level V taxon, in this case Swertia wilfordii; six level IV taxa; 31 level III taxa; 38 level II taxa; and 37 level I taxa. There are nine endemic plants, including Sillaphyton (=Peucedanum) podagraria, which is the endemic genus; two rare plants; fifteen northern plants; and one southern plant as target plants adaptable to climate change. Also, there are forty-six naturalized plants and five ecosystem-disturbance organisms. The results of this study suggest several species that should be preserved and can serve as basic information with which to establish conservation and management plans for the Wangpicheon conservation area.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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Predicting Post-Fire Tree Mortality in a Temperate Pine Forest, Korea
2021-05-12
ABSTRACT Warmer and drier conditions in temperate regions are increasing the length of the wildfire season. Given the greater fire frequency and extent of burned areas under climate warming, greater focus has been placed on predicting post-fire tree mortality as a crucial component of sustainable forest management. This study evaluates the potential of logistic regression models to predict post-fire tree mortality in Korean red pine (Pinus densiflora) stands, and we propose novel means of evaluating bark injury. In the Samcheok region of Korea, we measured topography (elevation, slope, and aspect), tree characteristics (tree/crown height and diameter at breast height (DBH)), and bark injuries (bark scorch height/proportion/index) at three sites subjected to a surface fire. We determined tree status (dead or live) over three years after the initial fire. The bark scorch index (BSI) produced the best univariate model, and by combining this index with the DBH produced the highest predictive capacity in multiple logistic regression models. A three-variable model (BSI, DBH, and slope) enhanced this predictive capacity to 87%. Our logistic regression analysis accurately predicted tree mortality three years post fire. Our three-variable model provides a useful and convenient decision-making tool for land managers to optimize salvage harvesting of post-fire stands.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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현삼의 사탕무황화바이러스 전체 염기서열과 특성
2021-12-28
Background: Figwort (Scrophularia buergeriana Miq.) is a biennial plant, whose dried root has been used in traditional medicine. Here, we investigated a viral disease in S. buergeriana, characterized the disease symptoms, and sequenced the complete genome of the identified virus. Methods and Results: Disease symptoms and growth characteristics were compared between two groups of plants, that is, those that were grown from rootlets and those cultivated from seeds. Leaf samples were collected from both groups for RNA sequencing analysis. Primers were designed based on the obtained contig, and the complete genome sequence was determined via reverse trancription polymerase chain reaction and cloning. Viral symptoms were ed in figwort plants. The highest incidence of infections was observed at the end of July. The complete genome of Beet western yellows virus (BWYV) ADHS comprised 5,878 nucleotides and seven open reading frames. Phylogenetic analysis based on the nucleotide sequence of the complete genome ed that the BWYV ADHS isolate was related most closely to the LS isolate from Korea. Conclusions: This study is the first report of BWYV infection in figwort worldwide. The virus affects plant height and root weight. Control methods should be developed to minimize virus damage in figwort culture.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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Mechanism of protein tyrosine phosphatase 1B inhibition by theaflavanoside IV isolated
2022-12-23
Abstract: Camellia sinensis (tea) seeds have been identified as potential sources of nutraceutical compounds. In this study, caffeine and theaflavanoside IV were annotated as the most abundant phytochemicals in the seed shells of C. sinensis . Both compound displayed potent inhibitions against protein tyrosine phosphatase 1B (PTP1B) with IC 50 values of 37.9 ± 3.5 and 8.7 ± 1.1 µM, respectively. In the kinetic study, caffeine inhibited PTP1B with mixed type I mode, which prefers to bind to free enzyme. Theaflavanoside IV showed competitive and reversible simple slow-binding inhibition [ k 3 = 0.1 µM −1 ·min −1 , k 4 = 0.002 min −1 , K i app = 0.0002 µM]. This is the first report on PTP1B-inhibitory activity of these compounds and their action mechanisms. These results suggest their potential in the development of antidiabetic agents.
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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Genetic and demographic signatures accompanying the evolution of the selfing syndrome in Daphne
2022-12-23
HOME > 주요사업 > 산림생물 보전·활용 증진 > 기술개발 성과 > 학술논문
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