• Korean Journal of Plant Taxonomy
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• v.37 no.2
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• pp.143-153
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• 2007

In order to estimate the relationships among four taxa (Styrax japonicus, Styrax obassia, Styrax shiraianus and Pterostyrax hispidus) of two genus in the Styracaceae and their regional populations, RAPDs analysis was performed. Fifteen random primers generating 238 RAPD bands were enough to reveal differences in genotype bands. They were clustered into three groups by the UPGMA phenogram. The first group was Styrax japonicus populations, the second group was consisted of Styrax obassia populations and S. shiraianus populations, and third group was Pterostyrax hispidus population. The UPGMA phenogram based on RAPD analyses showed that Styrax obassia and S. shiraianus had the closest relationship among four taxa. Species as well as genera of the Korean Styracaceae were well discriminated by the RAPD analyses.

• Archives of Pharmacal Research
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• v.27 no.3
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• pp.283-286
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• 2004

The methylene chloride soluble fraction of MeOH extract from the stem bark of Styrax japonica S. et Z. (Styracaceae) showed significant cytotoxicity by SRB method against five human tumor cell lines. Four known pentacyclic triterpenoids, oleanolic aldehyde acetate (1), erythrodiol-3-acetate (2), euphorginol (3), and anhydrosophoradiol -3-acetate (4) were isolated by activity-guided fractionation. Their structures were determined by chemical and spectral analysis. Compounds 1-4 were isolated from S. japonica for the first time.

• Korean Journal of Pharmacognosy
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• v.43 no.3
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• pp.198-200
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• 2012

Korean Folk Medicine 'DdaeJukNaMu' has been used mainly to cure toothache and neuralgia. With regard to the botanical origin of 'DdaeJukNaMu', it has been considered to be Styrax species of Styracaceae, but there was no pharmacognostical confirmation on it. To clarify the botanical origin of 'DdaeJukNaMu', the anatomical characteristics of the branch of Styrax species growing wild in Korea, Styrax japonica and Styrax obassia were studied. As a result, it was clarified that 'DdaeJukNaMu' was the branch of Styrax japonica.

• Bulletin of the Korean Chemical Society
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• v.29 no.8
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• pp.1594-1596
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• 2008

• Bulletin of the Korean Chemical Society
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• v.28 no.10
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• pp.1874-1876
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• 2007

• Proceedings of the PSK Conference
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• 2003.10b
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• pp.195.1-195.1
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• 2003

Styrax japonica Sieb. et Zucc. (Styracaceae) is a deciduous tree growing in Korea, Japan, and China. The pericarps of this plant have been used as a folk medicine for treatment of cough. Jegosaponins, deacyl jegosaponins and benzofurans have been reported from the fruits and seeds of this plant, and these compounds have been shown antisweet and cytotoxic activities. As a part of a research aimed at the discovery of biological active compounds from plant sources, we have studied a chemical constituent of the stem-bark of S. japonica. (omitted)

• Proceedings of the PSK Conference
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• 2003.10b
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• pp.205.3-206
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• 2003

The genus Styrax (Styracaceae) is different from other genera of this family due to the production of resinous material, usually secreted when the barks and trunks are injured by sharp objects. This resin, in the past considered a miraculous remedy in several parts of Asia and America, has been used in traditional medicine to treat inflammatory diseases. The CH$_2$Cl$_2$ fraction of Styrax japonica showed significant cytotoxic activities by SRB method against five human tumor cell lines (A549, HCT-15, MES-SA, SK-OV-3, and SK-MEL-2). (omitted)

• The Korean Journal of Ecology
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• v.20 no.3
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• pp.163-168
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• 1997

Taxa of the herbivorus insect larvae and their foodplant species were surveyed in a temperate forest of Namhansansung Area, Sungnam City, Kyonggi Province, in 1994-1996 growing season, Sixty two taxa of insect larvae fed on leaves of 18 woody species in 11 families during three growing season. Larvae began to be detected from the mid-April when the leafing time began. The number of larvae taxa reached to the maximum value(32 taxa) early in May, 1994. It was the time that the value of specific leaf area reached to the maximum. It decreased up to 3-4 taxa in the mid-June. Taxa of insect larvae were different year by year even in the same season. Most of larvae fed on various plant species, suggesting that they were generalist or polyphagous species. Fagaceae, Betulaceae, Ulmaceae, Rosaceae. Aceraceae, Ericaceae, Oleaceae and Styracaceae were fed on by many taxa of insect larvae, while Euonymus spp. (Celastraceae). Lindera obtusiloba(Lauraceae) and Symplocos chinensis for. pilosa(Symplocaceae) were mainly fed on by a few taxon.. Erannis, Calospilos and Phigalia were observed to feed on various species, but Illiberis, Pryeria and Chalocosia fed on only Rosaceae, Euonymus spp.(Cerastraceae) and Symplocos chinensis for. pilosa(Symplocaceae), respectively. An unidentified larva was observed only on Lindera obtusiloba (Lauraceae).

• The Korean Journal of Mycology
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• v.49 no.4
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• pp.531-537
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• 2021

Styrax japonicus is a deciduous shrub or a small tree belonging to the family Styracaceae. Since 1990, a rust fungus has continuously been found on S. japonicus leaves across the country. The morphological characteristics of the rust fungus were most consistent with those of Pucciniastrum styracinum reported on Styrax obassia in Japan. The species identification was confirmed by molecular phylogenetic analysis of the internal transcribed spacer and large subunit rDNA sequences. The current study provides mycological information with morphological measurements and molecular phylogenetic data of P. styracinum found on S. japonicus in Korea. Therefore, this is the first confirmed report on the presence of P. styracinum on S. japonicus in Korea.

• Korean Journal of Environment and Ecology
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• v.11 no.4
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• pp.415-432
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• 1998

The flora of Nasorak in the Soraksan National Park were botanically surveyed. This area has very rich and diverse flora; 656 taxa with 94 families, 320 genera, 552 species, 1 subspecies, 96 varieties and 7 forms in the region of Oesorak. The population of Asarum maculatum of Aristolochiaceae was recorded for the first time in this region. In the view of phytogeograghy, the 18 taxa such as Pinus pumila of Pinaceae, Leontopodium coreanum of Compositae, Leontice micoryncha of Berberidaceae and Rhododendron aureum of Ericaceae, etc. were recorded as northern elements, while the taxa such as Asarum maculatum of Aristolochiaceae, Styrax japonica of Styracaceae and Carex siderosticta of Cyperaceae as southern elements.