• Korean Journal of Organic Agriculture
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• v.22 no.2
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• pp.321-334
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• 2014

This study was conducted to identify plant growth promoting effects of native plant resources and medicinal plants. 65 kinds of plant extracts from 64 species were evaluated based on two rice(Oryza sativa) seedling bioassays for gibberellins and gibberellin-like substances. 12 extracts of Artemisia princeps stem and leaf, Cirsium japonicum var. maackii whole plant, Rhododendron mucronulatum branch and leaf, Phragmites communis stem, Coix lacryma-jobi var. mayuen whole plant, Lespedeza bicolor branch and leaf, Hydrangea serrata f. acuminata whole plant, Phlomis umbrosa whole plant, Glycyrrhiza uralensis Rhizome, G. uralensis stem and leaf, Angelica gigas root, and Cnidium officinale rhizome showed growth promotion of rice seedlings. Our results suggested that the parts of these plants could be the potential sources as farm-made liquid fertilizers for plant growth promotion.

• Korean Journal of Medicinal Crop Science
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• v.15 no.1
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• pp.26-29
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• 2007

Extracts of 13 medicinal plants were tested to investigate the improvable effects on microflora growth in the intestines of human. Water extracts of Artemisia capillaris, Taraxacum platycarpum and Ethanol extracts of Allium tuberosum, Artemisia capillaris, Artemisia vulgaris, Plantago asiatica, Schizandra chinensis, Sedum sarmentosum, Taraxacum platycarpum, Zingiber officinale inhibited the growth of C. perfringens. Water and ethanol extracts of Sedum sarmentosum, Schizandra chinensis inhibited the growth of E. coli. While 13 medicinal plants were not remarkably inhibited the growth of B. longum. Therefore, ethanol extracts of Schizandra chinensis, Sedum sarmentosum can be utilized as functional food materials to improve in the intestines.

• 한국약용작물학회:학술대회논문집
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• 2007.11a
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• pp.308.1-308.1
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• 2007

• Journal of the Korean Applied Science and Technology
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• v.37 no.2
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• pp.279-286
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• 2020

Natural extracts were isolated from 20 kinds of medicinal plants that have been traditionally widely used in Korea to develop treatments for dental caries. Medicinal plants showing antibacterial activity against a cariogenic bacterium, Streptococcus sobrinus KCOM 1157 were investigated. The natural extracts of Glycyrrhiza uralensis, Sophora flavescens, Coptis Chinensis, Mentha arvensis, Pinus densiflora, Spirodela polyrhiza showed antimicrobial activities against S. sobrinus KCOM 1157. The extracts of Pinus densiflora, Sophora flavescens, Coptis Chinensis among these medical herbs showed significant antimicrobial activity. These results suggested that the natural products of Pinus densiflora, Sophora flavescens, Coptis Chinensis could be the potential source of anticariogenic agent against dental pathogens including S. sobrinus.

• Horticultural Science & Technology
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• v.34 no.4
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• pp.537-548
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• 2016

The objective of this study was to evaluate the antimicrobial activities of 9 kinds of medicinal plants against crown gall in grapevine. The medicinal plants extracted with several solvent systems were screened for in vitro antibacterial activity by the disc diffusion method. The ethanol and ethyl acetate extracts from magic lily flowers, tachys roots, asian plantain flowers and seeds, sweet wormwood leaves, stems and flowers, immature bitter melon fruits, cockscomb flowers, and peach tree resin showed in vitro antimicrobial activities against Rhizobium vitis with growth inhibition zones ranging from 10 to 27 mm in diameter. The minimum inhibitory concentration values of extracts against R.vitis ranged from 10,000 in Asian plantain flower and 50,000 fold diluted extracts in sweet wormwood flowers, stems, leaves, cockscomb leaves and immature bitter melon fruits. The active fractions of ethyl acetate and ethanol extracts from the medicinal plants were partially separated through silica gel column chromatography and thin layer chromatography (TLC). The active fractions were separated at Rf 0.36, 0.69, 0.75, 0.84, and 0.94 in sweet wormwood extracts, Rf 0.96 and 0.99 in cockscomb flower extracts, Rf 0.92 and 0.97 in cockscomb leaf extracts, and Rf 0.85 in immature bitter melon fruit extracts in TLC analysis developed with hexane:ethyl acetate (20:80, v/v) and methanol:chloroform (20:80, v/v). Among extracts from plants with in vitro antimicrobial activities, sweet wormwood, cockscomb leaves, and immature bitter melon fruits showed in vivo antimicrobial activities with inhibition activity of 100, 67, and 83.3%, respectively, in 'Kyoho' grapevine inoculated with R. vitis compared with the untreated control. These findings indicate that extracts of medicinal plants could be used as sustainable candidates to control crown gall disease caused by R. vitis in grapevines.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 1997.04a
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• pp.31-31
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• 1997

• Korean Journal of Medicinal Crop Science
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• v.13 no.4
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• pp.178-181
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• 2005

Methanolic extracts of fifteen Chinese medicinal plants were screened for platelet-activating factor (PAF) receptor binding inhibitory activity using rabbit platelet. Campsis grandiflora, Dalbergia odorifera, Vaccaria segetalis and Zanthoxylum nitidum showed significant inhibitory effects on the platelet-activating factor (PAF) receptor binding. Campsis grandiflora, Dalbergia odorifera, Vaccaria segetalis and Zanthoxylum nitidum inhibited 52%, 56%, 70%, and 66% respectively at the concentration of 0.2 mg/ml.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.2
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• pp.384-389
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• 2012

As part of our screening of anticariogenic agents from medicinal plants, the ethanol extracts of 25 herbs widely used in the fork medicine were tested for the antimicrobial activity against a cariogenic bacterium Streptococcus mutans ATCC 25175. The ethanol extracts of Coptis chinensis, Sophora flavescens, Glycyrrhiza uralensis, Mentha arvensis, and Saururus chinensis showed antimicrobial activities against S. mutans. The extracts of Coptis chinensis and Sophora flavescens among these medicinal plants showed significant antomicrobial activity against S. mutans. These results suggested that the extracts of Coptis chinensis and Sophora flavescens could be the potential source of antimicrobial agent against S. mutans ATCC 25175.

• Korean Journal of Medicinal Crop Science
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• v.6 no.4
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• pp.311-322
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• 1998

Sixty medicinal and food plants native to Korea were mainly selected with old traditional habit and antioxidant activity was investigated. The 80% EtOH extracts of sixty medicinal and food plants were screened for antioxidant activity. Antioxidant activity was measured by the TBA (Thiobarbituric acid), DPPH (1, 1-Diphenyl-2-picrylhydrazyl), SOD (superoxide dismutase) which was evaluated by the nitro blue tetrazolium(NBT) reduction method. Among sixty plants, black Glycine max(87. 3%) and Solanum nigrum (80.6%) exhibited the highest antioxidant activity by TBA and DPPH methods, respectively. Also, 10 species extracts including black Glycine max showed the high activity value in these two methods. The SOD characteristics on black Glycine max seed extracts which showed the highest SOD activity (53.5%) exhibited four major SODs; two Cu/ZnSODs and two FeSODs. However, Adenophaora vertidllata which showed lowest SOD value (10.4%) had only Cu/Zn SOD. No varietal differences in the high SOD value were detected in the Cu/Zn SOD isozyme patterns.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.40 no.2
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• pp.133-141
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• 1995

The effects of allelochemicals from medicinal plants have been studied as photo-synthetic inhibitor for photoautotrophic(PA) cultured cells. The extracts from 9 plant species were used for measuring the physiological effects on the liverwort cultured cell in following areas; germination inhibition, chlorophyll contents, hill activity, cell viability, photosynthetic oxygen evolution,and protein pattern changes on SDS PAGE. Germination inhibitions were detected in all plant after treating with 10% extract. Especially, treatment with 10% extract from Pulsatilla koreana and Aconitum carmichael inhibited germinations completely. Chlorophyll fornation was inhibited completely by treating PA cells with extract of Pulsatilla koreana, whose effect was similar to that of DCMU 10-3M, inhibitor for photosynthetic electron trans-fer. The treatment with extract from Pulsatilla koreana on PA cell showed the highest hill activity and the lowest cell viability among extracts studied. Oxygen releasing has been decreased down to 14-77% after treating with extracts from Pinellia ternata, Araliacont inentaila, Pulsatilla koreana and Vitex rotundifolia. Especially, 60$\mu$l of Pulsatilla koreana extract into 2ml mixture of PA cell inhibit-ed oxygen release up to 50%. Protein bands on SDS-PAGE, 14kD, 31kD, 41kD, 53kD, and 73kD, were not detected after treating Pulsatilla koreana extract on PA cells.