• Korean Journal of Plant Taxonomy
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• v.50 no.3
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• pp.262-278
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• 2020

We investigated the bryophyte flora of Taebaeksan Mountain National Park in Korea by conducting a total of ten field surveys from April of 2017 to October of 2019 at various mountainous sites in the park. During the surveys, we recorded 274 taxa belonging to 68 families, 143 genera, 267 species, 3 subspecies, and 4 varieties. Among these, 92 species were reported as new to the flora of the Taebaeksan Mountains. A checklist based on a study of 990 specimens is provided as well. The most remarkable species were Sphagnum capillifolium (Ehrh.) Hedw, Sphagnum girgensohnii Russow, Buxbaumia punctata P.-C. Chen et X.-J. Li, Pleuroziopsis ruthenica (Weinm.) Kindb., Ptilium crista-castrensis (Hedw.) De Not., and Douinia plicata (Lindb.) Konstant. et Vilnet.

• Advances in Computational Design
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• v.3 no.1
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• pp.35-47
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• 2018

Design of settlement space is a complicated process while reasonable spatial layout bears great significance on the development and resource allocation of a settlement. The study proposes a weighted L-system generation algorithm based on CA (Cellular Automation) model which tags the spatial attributes of cells through changes in their state during the evolution of CA and thus identifies the spatial growth mode of a settlement. The entrance area of the Caidian Botanical and Animal Garden is used a case study for the model. A design method is proposed which starts from the internal logics of spatial generation, explores possibility of spatial rules and realizes the quantitative analysis and dynamic control of the design process. Taking a top-down approach, the design method takes into account the site information, studies the spatial generation mechanism of settlements and further presents a engine for the generation of multiple layout proposals based on different rules. A optimal solution is acquired using GA (Genetic Algorithm) which generates a settlement spatial layout carrying site information and dynamically linked to the surround environment. The study aims to propose a design method to optimize the spatial layout of the complex settlement system based on parametric generation.

• Korean Journal of Plant Taxonomy
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• v.43 no.2
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• pp.99-102
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• 2013

The natural populations of Lycopus lucidus Turcz. ex Benth. var. hirtus Regel (Lamiaceae) were found in Gangwon province, Korea. This taxon was mainly distinguished from L. lucidus Turcz. ex Benth. var. lucidus by having multicellular hairs on the stem and leaves. However, the delimitation of this taxon from the typical plants of this variety (var. lucidus) was never assessed and the existence of this taxon was obscure in Korea. So, we provide a detailed morphological description of this taxon, as well as its geographical distribution and habitat.

• Korean Journal of Plant Taxonomy
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• v.43 no.2
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• pp.94-98
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• 2013

A new species, Daphne jejudoensis M. Kim, has been named and described from Seonheul, Jejudo Province, Korea. Daphne jejudoensis shares several characteristics (white calyx colors, long calyx tube, evergreen leaves, leathery leaf textures, etc.) with its related species D. kiusiana, but it is distinct from D. kiusiana which has a hairy calyx tube and lobes, short calyx lobes, oblanceolate leaves (with acute apex), and a different distribution (coastal region in Geojedo Is.) by having a glabrous calyx tube and lobes, long calyx lobes, elliptic leaves (with acuminate apex), and by its distribution (inland region in Jejudo Is.).

• Korean Journal of Plant Taxonomy
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• v.46 no.3
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• pp.288-294
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• 2016

The Vietnamese occurrence of Stephania subpeltata H. S. Lo (Menispermaceae) is reported here for the first time. It is morphologically allied to S. japonica but differs in having subpeltate, ovate deltoid or broadly deltoid to subdeltoid leaves, shorter petiole, fewer leaf veins, conspicuously pedicellate umbelliform cymes which are seldom compound, and purple flowers and endocarp with a reduced number of abaxial rows. A taxonomic description, distribution details, ecology, and a key to the Vietnamese species of Stephania are provided.

• BMB Reports
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• v.37 no.5
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• pp.527-532
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• 2004

A subtracted cDNA library specific to osmotic stress of Haloxylon ammodendron (Mey.) Bge seedlings was constructed by suppression subtractive hybridization (SSH) and T/A cloning. SSH was performed between two groups of H. ammodendron seedlings, one was cultivated in Hoagland (H) solution as a driver and the other group was treated with osmotic stress of the Hoagland solution by the addition of 400 mM mannitol (M), as a tester. The library consisted of about 400 recombinant clones, with the average size being of 500 bp, ranging from 300 bp to 1500 bp. Using a PCR-select differential screening kit, 100 recombinant clones were randomly chosen from the subtracted cDNA library and hybridized with forward,reverse subtracted and unsubtracted probes for two rounds. As a result, 21 positive clones specific to osmotic stress were obtained and some of them were verified by Northern blot analysis. The sequencing analysis of 6 positive clones and the following homology comparison to GenBank [blastx] non-redundant databases characterized that two sequences obtained in this experiment may contribute to novel drought-related genes.

• Korean Journal of Plant Taxonomy
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• v.46 no.1
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• pp.55-59
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• 2016

Justicia kampotiana Benoist (Acanthaceae) is reported as a new record for the flora of Vietnam. This species differs from its allied species J. ingrata Benoist in having corolla outside pubescent, tubes slightly longer than limbs and considerably shorter petioles. Description, line drawing and color photographs are provided for species identification. Furthermore, a comparison of the diagnostic characters with those of related species is made.

• Mycobiology
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• v.38 no.2
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• pp.113-117
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• 2010

Trichoderma strains were evaluated under field conditions to assay their efficacy in suppressing Alternaria fruit rot disease and promoting chili plant growth. The experiment was conducted at the Botanical Garden, Rajshahi University, Bangladesh from July 2006 to March 2007. Application of Trichoderma harzianum IMI 392432 significantly (p = 0.05) suppressed the disease compared to Alternaria tenuis (T2) treatment and improved both growth and yield. The treatment T4 (T. harzianum IMI-392432 + A. tenuis) was most effective in reducing disease percentage (72.27%) compared to A. tenuis (T1) treatment. The highest seed germination rate (85.56%) and the highest growth and yield (12.5 g/plant) was also recorded in the same treatment (T4), followed by T5 (T. harzianum IMI-392433 + A. tenuis), T6 (T. harzianum IMI-392434 + A. tenuis), T2 (T. virens IMI-392430 + A. tenuis), and T3 (T. pseudokoningii IMI-392431 + A. tenuis) treatment, while single treatment with A. tenuis significantly decreased these values.

• Korean Journal of Plant Resources
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• v.32 no.1
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• pp.63-71
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• 2019

Two unrecorded alien plants, Melilotus officinalis (L.) Lam. and M. indicus (L.) All. (Leguminosae) were found in Korea. M. officinalis is native to Eurasia and widely distributed in agricultural regions throughout the world. M. indicus is native to Mediterranean and Southwestern Europe, and naturalized in temperate regions all over the world. These species are morphologically similar to M. suaveolens (Jeon-dong-ssa-ri). However, M. officinalis is distinguished from M. suaveolens by transverse nerved legumes, definite ovary stalks, and five to eight number of ovules in ovary. M. indicus is also distinguished from M. suaveolens by smaller size of flowers, broadly triangular calyx teeth, globose legumes, and minutely papillose seeds. The local name of M. officinalis and M. indicus were given as "Ju-reum-jeon-dong-ssa-ri" and "Jom-jeon-dong-ssa-ri" based on transverse nerved legumes and overall smaller size than M. suaveolens, respectively. The descriptions on morphological characters and photographs at the habitat of M. officinalis and M. indicus are provided.

• Natural Product Sciences
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• v.28 no.3
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• pp.153-160
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• 2022

Neuroinflammation is known to be associated with brain injury in Alzheimer's disease (AD), and the inhibition of microglial activation, a key player in inflammatory response, is considerd as important target for AD. In this study, the ethanol extract of aerial parts of Forsythia velutina Nakai, a Korean native species, significantly inhibited nitric oxide (NO) production in LPS-stimulated BV2 microglial cells. Thus, the active principles in F. velutina aerial parts were isolated based on activity-guided isolation method. As a result, six compounds were isolated and their structures were elucidated based on NMR data and the comparison with the relevant references as arctigenin (1), matairesinol (2), rengyolone (3), ursolic acid (4), secoisolariciresinol (5), and arctiin (6). Among them, four compounds including arctigenin (1), matairesinol (2), secoisolariciresinol (5), and arctiin (6) significantly inhibited NO production in a dose-dependent manner. In particular, matairesinol (2) and secoisolariciresinol (5) reduced 60% of NO production compared to LPS-treated group. This inhibitory effects of matairesinol (2) and secoisolariciresinol (5) were accompanied with the reduced expression levels of iNOS and COX-2. These results suggest that the extract of F. velutina and its active compounds could be beneficial for neuroinflammatory diseases including AD.