• Plant Resources
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• v.8 no.3
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• pp.209-216
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• 2005

Persicaria thunbergii has been utilized for the treatment of cancer as a folk medicine. We examined the effect of isorhamnetin, a flavonoid isolated from Persicaria thunbergii, on angiogenesis in vitro and in vivo. Basic fibroblast growth factor (bFGF) is a potent angiogenic factor found in various tumors. In this study, we found that the isorhamnetin decreased bFGF-induced human umbilical vein endothelial cells (HUVECs) proliferation and migration in a concentration-dependent manner (5, 10 and $20\;{\mu}M$) whereas, it did not inhibit bFGF-induced capillary-like formation of HUVECs. The chicken chorioallantoic membrane assay revealed that addition of isorhamnetin (10, 20 and $40\;{\mu}M$) displayed an antiangiogenic effect in vivo. These results suggest that the isorhamnetin inhibits the proliferation and migration of endothelial cells induced by bFGF, which may explain its anti-angiogenic properties.

• Environmental Analysis Health and Toxicology
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• v.11 no.3_4
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• pp.23-32
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• 1996

In this study, we investgated the uptake capacity of several water plants for heavy metals (lead and cadmium) in soil of rivers where are adjacent to a industrial complex in Chun-An city and in A-San city. We also examined the deposition pattern of heavy metal in plants. The results are as follows: 1. The soil of river in Chun-An city was polluted more serious than that of A-San city. In Chun-An city, mean values of lead and cadmium contents in soil were 26.224 $\pm$ 28.037 $\mu$g/g, and 0.854 $\pm$ 1. 127 $\mu$g/g, respectively. 2. Water plants examined in this study were Slum suave KITAGAWA, Persicaria thunbergii H. GROSS, Phragmiles japonica STEUD, Echinochloa crus-galli var. frumentacea WIGHT and Persicaria hydropiper SPACH. Both metal contents of several water plants distributed in Chun-An city were higher than those in A-San city. In these plants, Slum suave showed the highest uptake capacity for lead and cadmium. The mean values of lead and cadmium contents in Slum suave were 40.957 $\pm$ 29.577 $\mu$g/g and 1. 930 $\pm$ 1. 076 $\mu$g/g, respectively. Persicaria thunbergii also showed a relatively high uptake capacity for both metal. 3. Correlation between metal contents in soil and water plants was high. In both cases of Sium suave and Persicaria thunbergii correlation coefficients were 0.605 and 0.549, respectively. 4. We analyzed lead and cadmium contents in root, stem and leaf of several water plants. Both metals were mostly deposited in root. Much of both metals were also deposited in leaf. From the results, we suggest that Slum suave KITAGAWA and Persicaria thunbegii H. GROSS can be used to reduce heavy metals from industrial waste water.

• Korean Journal of Weed Science
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• v.16 no.4
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• pp.346-353
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• 1996

To study the effects of metal ions on the activities of antioxidative enzymes, the activities of superoxide dismutase(SOD), peroxidase(POD), catalase(CAT) of Persicaria vulgaris has been studied after treating with Cd, Cu, Zn and Al. 1. The activities of SOD in leaf and stem were decreased, but that in root was increased. Among the metal ions studied in this report, Al gave the highest increase in SOD activity in root. 2. The activities of POD after treating with Cd or Cu did not show any significant differences. POD activities after treating with Zn and Al has been decreased, however, that in root showed increased activities after treating with Zn 5,000 ppm or Al 500 ppm. 3. The activity of CAT in leaf was decreased with every metals studied. The CAT activity in root was increased with increased concentration. The root treated with Al showed highest activity. 4. The presence of isozymes after treated metal ions has been studied in gel electrophoresis. The POD treated plant did not show any new isozymes, but the intensity of one of pre-existent band was increased. The SOD treated plant showed the several new isozymes.

• Journal of Wetlands Research
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• v.5 no.2
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• pp.43-55
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• 2003

Vegetation structure was investigated in the Hyeonchang wetland and its watershed around the Nakdong-gang, Changryeong-county, Gyeongsangnamdo, Korea. from May to August, 2001. The vegetation type of the Hyeonchang wetland was classified into 12 communities based on the actual vegetation map: Phragmites communis community, Zizania latifolia community, Phragmites communis - Persicaria perfoliata community, Salix koreensis community, Persicaria perfoliata - Phragmites communis community, Spirodela polyrhiza community, Persicaria perfoliata community, Cyperus amuricus community, Cyperus amuricus-EchinochJoa crus-galli var. frumentacea community, Phragmites communis-Zizania latifolia community, EchinochJoa crus-galli var. frumentacea community, and Persicaria maackiana community. Among them, Phragmites communis community was the largest (4.3 ha, 24%). The dominant vegetation type were Phragmites communis community, Echinochloa crus-galli var. frumentacea-Persicaria maackiana community, and Cyperus amuricus subcommunity based on the phytosociological method. The vegetation type of the Hyeonchang wetland watershed was classified into five communities based on the actual vegetation map: Pinus densilflora community, Pinus rigida community, Pinus densiflora-Quercus acutissima community, Pinus densiflora-Larix gmelini var. principis-ruprechtii community, and Populus tomentiglandulosa community. Among them, Distribution area of Pinus densiflora community was largest (399.3 ha, 61.8%). And the degree of green naturality of the Pinus densiflora community was 7 and 8 degree.

• Korean Journal of Plant Taxonomy
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• v.36 no.1
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• pp.21-40
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• 2006

We examined nrDNA ITS sequences from 16 taxa of Polygonum sect. Persicaria(Polygonaceae) in Korea to infer relationships among the taxa within the section. A neighbor-joining tree obtained from the analysis of the ITS sequences suggest that the ITS region was useful inferring the phylogenetic relationships among the taxa. The neighbor-joining tree indicates that P.amphibium is clearly separated from the other Korean taxa. The tree also reveals the presence of five major groups in the Korean taxa of the section; 1) P. lapathifolium var. lapathifolium, 2) P. persicaria and P. viscoferum, 3) P. orientale and P. viscosum, 4) P. japonicum and 5) a group including the remaining taxa. these relationships depicted on the ITS tree are largely congruent with those inferred from morphological and anatomical characters.

• Journal of Wetlands Research
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• v.7 no.3
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• pp.87-95
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• 2005

Vegetation structure of the vascular plants was investigated from March 2003 to October 2003 in Haepyeong wetland, Gumi-si, Gyeongsangbuk-do, Korea. Actual vegetation of Haepyeong wetland largely can be classified by floristic composition and physiognomy into 18 communities; Xanthium strumarium-Digitaria sanguinalis, Humulus japonicus, Persicaria perfoliata-Humulus japonicus, Phragmites japonica-Miscanthus sacchariflorus, Persicaria hydropiper-Phragmites communis, Persicaria hydropiper, Phragmites japonica-Persicaria hydropiper, Miscanthus sacchariflorus- Phragmites japonica, Persicaria hydropiper-Phragmites japonica, Miscanthus sacchariflorus-Salix glandulosa, Salix nipponica-Salix glandulosa, Salix nipponica-Salix koreensis, Salix nipponica, Miscanthus sacchariflorus-Salix nipponica, Phalaris arundinacea-Salix nipponica, Salix glandulosa-Salix nipponica, Trapa japonica, and Ceratophyllum demersum-Trapa japonica. Among them, the area of the Salix nipponica-Salix koreensis community was the largest as 122.2ha(9.23%). The dominant vegetation type was Miscanthus sacchariflorus-Persicaria hydropiper community based on phytosociological method, and it was was classified into three subcommunities; Salix glandulosa-Salix nipponica subcommunity, Digitaria sanguinalis subcommunity, and Cyperus amuricus subcommunity. Differential species of Salix glandulosa-Salix nipponica subcommunity were Salix nipponica, S. glandulosa, S. koreensis, Scirpus radicans, Persicaria maackiana, and Achyranthes japonica; differential species of Digitaria sanguinalis subcommunity were D. sanguinalis, Setaria viridis, Ambrosia artemisiifolia var. elatior, and Cyperus orthostachyus; differential species of Xanthium strumarium subcommunity were X. strumarium, Acalypha australis, Erigeron canadensis, Echinochloa crus-galli, and Vicia tetrasperma. Zonation of vascular hydrophytes and hygrophytes was as followers: Salix glandulosa, S. koreensis, S. nipponica were distributed in the region of land which water table is low, and Persicaria maackiana, Persicaria hydropiper, Scirpus radicans were distributed in the understory. And emergent plants such as Phragmites communis and Scirpus karuizawensis, floating-leaved plant such as Trapa japonica, submersed plant such as Ceratophyllum demersum, and free floating plant such as Spirodela polyrhiza formed the zonation from shoreline to water. The specified wild plants designated by the Korean Association for Conservation of Nature, Ministry of Forest, and Ministry of Environment were not distributed in the study area. It was expected that Haepyeong Wetland worthy of conservation contributed purifying water pollution, giving habitats of many lifes, and providing beautiful scenes of the river.

• Culinary science and hospitality research
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• v.22 no.6
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• pp.14-23
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• 2016

This purpose of this study is to examine the antioxidant and antimicrobial activities of Persicaria hydropiper L. extract in 70% ethanol and in water, a medicinal herb, as an effort to examine the potential of medicinal herbs for development of antioxidants and natural preservative substitutes. The total poly-phenol content in the 70% ethanol extract and in the water extract were 19.88 mg/g and 7.46 mg/g, respectively. The DPPH radical scavenging activity was 90.99% and 64.98% in the 70% ethanol extract and water extract, in which 70% ethanol extract showed a higher activity. The antioxidant effect of Persicaria hydropiper L. extract appears to be very good and due to its excellent growth inhibitory effect on food-poisoning-causing microorganisms in the food, it is thought to be utilized as a potential natural preservative substitute in many areas.

• Natural Product Sciences
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• v.12 no.4
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• pp.214-216
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• 2006

Isorhamnetin from the aerial parts of Persicaria thunbergii has been reported to have anti-tumor activity mediated by the inhibition of farnesyl protein transferase. In this study, we investigated the anti-proliferation effects of isorhamnetin on NIH3T3, K-RAS, H-RAS and SW620 cells, and it showed anti-proliferative effects in a dose-dependent manner with $IC_{50}$ value 4.1, 7.9, 20.2, and $22.4{\mu}g/ml$, repectively.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1998.11a
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• pp.186-186
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• 1998

Persicaria lapathifolia Gray (Polygonaceae) is a common weed in Korea. This plant and other Persicaria species including P. orientale and P. pubescens have been used as an analgesic and stomachic as well as for the treatment of rheumatoid arthritis and malaria. During the screening program of plant extracts, MeOH extract of P. scabrum showed anticomplement activity and the MeOH extract was partitioned with hexane, chloroform, ethyl acetate, and buthanol. EtOAc fraction showed strong activity and activity guided separation yielded eight flavonoids. Two known galloylated and a novel ferulloylated flavonoid glycosides showed strong anticomplement activity. Other flavonoid glycosides, kaempferol 3-O-${\alpha}$-$\sub$L/-arabinopyranoside, kaempferol 3-O-${\beta}$-$\sub$D/-glucopyranoside, kaempferol 3-O-${\beta}$-$\sub$D/-galactopyranoside, quercetin 3-O-${\alpha}$-$\sub$L/-arabinopyranoside, quercetin 3-O-${\beta}$-$\sub$D/-glucopyranoside, quercetin O-${\beta}$-$\sub$D/-galactopyranoside did not showed anicomplement activity.

• The Korean Journal of Mycology
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• v.18 no.1
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• pp.26-41
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• 1990

Eleven species of endomycorrhizal fungi were isolated from the soils in the communities of Persicaria thunbergii: A. bireticulata, A. scrobiculata, Gi. decipiens, Gi. gigantea, Gi. margarita, Gl. albidum, Gl. manihotis, Gl. pulvinatum, Sc. erythropa and Sc. gregaria.