• Applied Biological Chemistry
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• v.39 no.4
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• pp.315-319
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• 1996

The yields of methanol extracts of several Chrysanthemum spp.(5 species, 9 parts) and their solvent fractions were investigated. The yields of methanol extracts ranged from 16.9%(for flower of C. indium, Cultivated) to 31.5%(for whole plant of C. indium). In the tests of the antibacterial activity. the methanol extracts from flower of C. zawadskii and C. boreale, whole plant of C. zawadskii, and flower of C. coronarium showed excellent antibacterial activity. Generally, the chloroform fractions exhibited stronger antibacterial activity against all the bacteria tested when compared with other solvent fractions. In case of C. boreale, the chloroform fraction of the whole plant was shown stronger antibacterial activity against all four bacterial strains tested when compared with that of the flower. The chloroform fractions from flower and whole plant of C. boreale and C .zawadskii, and flower of C. coronarium were shown a similar TLC pattern.

• Proceedings of the Korean Society of Crop Science Conference
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• 2021.10a
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• pp.199-199
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• 2021

• Journal of the Korean Society of Environmental Restoration Technology
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• v.14 no.5
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• pp.53-67
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• 2011

The major objective of this study was to quantify the effects of substrate depth and substrate composition on the development of sedum etc., in a sloped rooftop (6 : 12 pitch) environment during a 4-year period. The experiment was conducted from 2006 October to 2010 December under several conditions without soil erosion control : two substrate depth (5cm, 10cm), four substrate composition (A5N3C2, A3N3C4, A6C4, G5L3C2: A: artificial lightweight soil, N : natural soil, G : granite decomposed soil, C : leave composite, L : loess), four sloped roof direction ($E40^{\circ}W$, $W40^{\circ}N$, $S40^{\circ}W$, $N40^{\circ}E$). In this experiment 4 sedum etc., were used: Sedum sarmentosum, Sedum kamtschaticum, Sedum rupestre, Sedum telephium, flowering herbs (mixed seed : Taraxacum platycarpum, Lotus corniculatus, Aster yomena, Aster koraiensis), western grasses (mixed seed : Tall fescue, Creeping redfescue, Bermuda grass, Perennial ryegrass). The establishment factor had two levels : succulent shoot establishment (sedum), seeding (flowering herbs, western grasses). 1. Enkamat, as it bring about top soil exfoliation, was unsuitable material for soil erosion control. 2. Sedum species exhibited greater growth at a substrate depth of 10cm relative to 5cm. All flowering herbs and western grasses established only at a substrate depth of 5cm were died. A substrate depth of 5cm was not suited in sloped rooftop greening without maintenance. If additional soil erosion control will be supplemented, a substrate depth of 10cm in sloped rooftop greening without maintenance was considered suitable. 3. For all substrate depth and composition, the most abundant species was Sedum kamtschaticum. The percentage of surviving Sedum kamtschaticum was 73.4% at a substrate depth of 10cm in autumn 2007 one year after the roof vegetation had been established. But the percentage of surviving other sedum were 33.3%~51.9%, therefor mulching for soil erosion control was essential after rooftop establishment in extensive sloped roof greening was proved. To raise the ratio of plant survival, complete establishment of plant root at substrate was considered essential before rooftop establishment. 4. There was a significant interaction between biomass and substrate moisture content. There were also a significant difference of substrate moisture and erosion among substrate composition. The moisture content of A6C4 was highest, the resistance to erosion of A5N3C2 was highest among substrate composition. The biomass of plants were not significantly higher in A5N3C2 and A6C4 relative to A3N3C4 and G5L3C2, For substrate moisture and erosion resistance, A5N3C2 and A6C4 were considered suitable in sloped rooftop greening without maintenance. 5. There were significant difference among roof slope direction on the substrate moisture. Especially, the substrate moisture content of $S40^{\circ}W$ was lower relative to that of $N40^{\circ}E$, that guessed by solar radiation and erosion.

• Applied Biological Chemistry
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• v.51 no.1
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• pp.65-69
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• 2008

The roots of Brassica campestris ssp rapa were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2O$. From the EtOAc fraction, three compounds were isolated through the repeated silica gel and octadecyl silica gel (ODS) column chromatography. From the results of spectroscopic data including NMR and MS, the chemical structures of the compounds were determined as caulilexin C (1), indoleacetonitrile (2) and arvelexin (3). The arvelexin (3) has been isolated from this plant for the first time. Compounds 1, 2 and 3 showed inhibitory activity on human Acyl CoA: cholesterol. transferase 1 (hACAT1) by $54.6{\pm}6.0%$, $69.2{\pm}4.7%$ and $68.6{\pm}3.7%$, and on human Acyl CoA: cholesterol transferase 2(hACAT2) by $4.8{\pm}13.4%$, $45.6{\pm}4.8%$ and $39.5{\pm}4.3%$, respectively, at 100 ${\mu}g/ml$.

• Journal of Plant Biotechnology
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• v.46 no.4
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• pp.282-290
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• 2019

Cuphea viscosissima plants accumulate medium-chain fatty acids (MCFAs), i.e., those containing 8 ~ 14 carbons, in their seeds, in addition to the longer carbon chain fatty acids (≥16 carbons) found in a variety of plant species. Previous studies have reported the existence of three C. viscosissima MCFA-producing acyl-acyl carrier protein (ACP) thioesterases with different substrate specificities. In this study, CvFatB4, a novel cDNA clone encoding an acyl-ACP thioesterase (EC 3.1.2.14), was isolated from developing C. viscosissima seeds. Sequence alignment of the deduced amino acid sequence revealed that four catalytic residues for thioesterase activity are conserved and a putative N-terminal chloroplast transit peptide is present. Overexpression of CvFatB4 cDNA, which was under the control of the cauliflower mosaic virus 35S promoter, in Arabidopsis thaliana led to an increase in 16:0 fatty acid (palmitate) levels in the seed oil at the expense of 18:1 and other non-MCFAs.

• Research in Plant Disease
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• v.18 no.4
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• pp.290-297
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• 2012

In this study, total number of 1941 Capsicum accessions conserved at RDA Genebank was evaluated for their response to Cucumber mosaic virus (CMV). These accessions were composed with 9 species originated from 89 countries, included 839 Capsicum annuum, 277 C. baccatum, 395 C. chinense, 343 C. frutescens, 49 C. pubescens, and other 38 wild pepper species (C. chacoense, C. galapagoense, etc.). Resistant to CMV was screened with the 240H02SP6 SNP marker related to the Cmr1 (Cucumber mosaic resistance 1). Eighty nine accessions of pepper germplasm were resistant to CMV based on the marker. One hundred sixty two accessions showed heterozygosity. One thousand two hundred seventy accessions were susceptible to CMV. Four hundred twenty accessions did not show distinction by 240H02SP6 marker. These 89 resistant pepper germplasm can be used in a pepper breeding program against CMV.

• Proceedings of the Korean Society of Plant Pathology Conference
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• 2003.10a
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• pp.81.1-81
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• 2003

Although plants have evolved to possess various defense mechanisms from local biotic and abiotic stressors, most of yield loss is caused by theses stressors. Recent studies have revealed that several different stress responsive reactions are inter-networking. Therefore, the identification and dissection of stress responsive genes is an essential and first step towards understanding of the global defense mechanism in response to various stressors. For this purpose, we applied cDNA microarray analysis, because it has powerful ability to monitor the global gene expression in a specific situation. To date, more than 10,000 non-redundant genes were identified from seven different cDNA libraries and deposited in our EST database (http://plant.pdrs.re.kr/ks200201/pepper.html). For this study, we have built 5K cDNA microarray containing 4,685 unigene clones from three different cDNA libraries. Monitoring of gene expression profiles of hot pepper interactions with biotic stress, abiotic stresses and chemical treatments will be presented. Although this work shows expression profiling at the sub-genomic level, this could be a good starting point to understand the complexity of global defense mechanism in hot pepper.

• Korean Journal of Plant Tissue Culture
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• v.27 no.4
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• pp.325-337
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• 2000

All living organisms depend on soil and water for their sustained growth and development. In recent years, sustenance of life in these growth matrices has been adversely affected by the cumulative increase in environmental pollutants resulting from increasing population, growing economies and resource-use. This review provides a glimpse into the problem of global environmental pollution, the traditional technologies available for remediation and the scope of emerging‘plant-based remediation’technologies. Phytoremediation, the use of plants to effectively remove or stabilize contaminants from the growth substrate, is a low cost and ecologically friendly alternative to the common‘dig and dump’technologies. The field of phytoremediation has been driven by the intrinsic need for identification of ideal candidate plant species. To date, there are only a very few identified plants which satisfy all of the prerequisites for use in phytoremediation. The review focuses on one such plant species, the common horticultural plant scented geranium (Pelargonium sp.), with demonstrated potential to remediate metal / salt contaminated soils / aqueous systems. The characterization of tolerance and metal / salt accumulation potential of Pelargonium sp. and its efficacy in remediating complex contaminated sites are described. The unique ability of scented geraniums to tolerate excessive amounts of multi-metals, hydrocarbon and salt mixtures, and at the same time to accumulate significant amounts of metal and salt ions in the biomass, renders this plant species as one of the ideal candidates for remediation.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.60-60
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• 2018

This study was carried out to develop the seed propagation method of Dicenta spectabilis (L.) Lem. which is an ornamental plant native to Korea. In the previous studies, it was found that the seeds of D. spectabilis were morphophysiologically dormant (MPD), and high and low temperature of stratification were continuously required for the embryo growth and germination of the seeds. Especially, it was most effective to store for 1 month at $20^{\circ}C$ and then to transfer to $4^{\circ}C$. The treatment of $GA_3$ was carried out to promote embryo development and germination. The seeds were submerged in 100, 200 or $500mg{\cdot}L^{-1}$ $GA_3$ for 72 hours and then stored at various conditions as follow. The temperature conditions disposed of this experiment were 1 month at 10, 15, 20, and $25^{\circ}C$ or 2, 4, 8, and 12 months at $4^{\circ}C$, respectively. As a result, the length of embryo and germination rate of the seeds were the best when stored at $4^{\circ}C$ for 8 months after $500mg{\cdot}L^{-1}$ $GA_3$ treatment. Besides, when the seeds stored at $4^{\circ}C$, significant differences in embryo length and germination rate were shown with $GA_3$ concentration and storage period. It was also proved that high-concentration of $GA_3$ could replace the high temperature and could promote germination. Consequentially, the D. spectabilis seeds were classified into intermediate simple levels among MPD types.

• Korean Journal of Plant Taxonomy
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• v.51 no.4
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• pp.363-371
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• 2021

Vicia bifolia Nakai (Fabaceae) and Cyperus compressus L. (Cyperaceae) have been ambiguous in terms of their distribution and taxonomic entities in Korea. The existence of these two taxa was confirmed when V. bifolia and C. compressus was found on Jellabuk-do, Gyeongsangnam-do, and Jeju-do. Vicia bifolia is similar to V. unijuga by having a pair of leaflets but is distinguished by the length of the petiole, the size and degree of longevity of the bracts, and the shape of the stipules. Cyperus compressus was found on Jeju-do, is similar to C. tenuispica, C. haspan, and C. flaccidus, but is distinguished by the branching pattern of the inflorescences and the size of scales and achenes. A description, differences from related species, a key to the taxa and photographs of Korean Vicia bifolia and Cyperus compressus are provided in this study.