• Korean Journal of Pharmacognosy
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• v.13 no.2
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• pp.55-61
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• 1982

Thirtyfour species of Korean medicinal plants which have been frequently used in oriental herb prescriptions were evaluated on their cytotoxicity and potential antitumor activities against AC glioma(9 ASK) in vitro. Dose of $100{\mu}g/ml$ of plant extracts appeared to exhibit slight cytotoxicity. Seven plant extracts, Aralia continentalis(Araliaceae), Lycium chinensis(Solanaceae), Epimedium koreanum(Berberidaceae), Platyodon grandiflorium(Campanulaceae), Pleuropterus multiflorus(Polygonaceae), Rheum undulatun(Polygonaceae) and Scutellaria baicalensis(Laminaceae), exhibited significant reversal$(51{\sim}90%)$ of astrocyte formation into original neuroglial cells' morphology through the prescreen tests.

• Korean Journal Plant Pathology
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• v.11 no.4
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• pp.380-382
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• 1995

Yellow spot or blotch symptoms on the upper surface of leaf, without the production of velvet-like fungi on the lower surface of leaf as in the gray mold of tomato caused by Cladosporium fulvum, were observed in tomato (cv. Seokwang) plants in May, 1995, in a vinyl-house of the experimental plot of Gyeongnam Provincial Rural Development Administration, Chinju, Gyeongnam, Korea. We identified this disease as powdery mildew of tomato caused by Oidiopsis taurica (L v.) Arnaud (=Leveillula taurica), which was new to Korea. Conidia of the fungus were borne on uni- or bi-septated conidiophores which were developed through the stomata of the tomato leaf. The conidia were slender, clavate and variable in size (31~111.6$\times$13.1 ${\mu}{\textrm}{m}$). The fungal conidia isolated from tomato leaves were inoculated to tomato plants, and the occurrence of the same disease was confirmed based on the symptomatology and the morphology of the pathogen reisolated.

• Korean Journal of Medicinal Crop Science
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• v.14 no.6
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• pp.342-346
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• 2006

Anatomical characters of the Bupleurum latissimum Nakai, an endemic species of Korea, were investigated to confirm its phylogenetic relationships. Compare to other species with anatomical characters, B. latissimum is very similar with B, euphorbioides and B, longeradiatum in point of lacking of pith in the stem, shape of involucres, number of vascular bundles in radical leaf and cauline leaf, and lacking stomata in adaxial leaf surface. The other hand, protruded pollen aperture character appears in B. latissimum and B. euphorbioides. On the based of anatomical characters, therefore, B. latissimum has closest relationships with B. euphorbioides and B. longeradiatum. It also needs molecular study including Asian species in order to confirm phylogenetic position and speciation process apparently.

• Proceedings of the Korean Society of Plant Biotechnology Conference
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• 2003.10a
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• pp.174-174
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• 2003

• Korean Journal of Plant Taxonomy
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• v.41 no.3
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• pp.271-279
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• 2011

The morphological characteristics of the Korean Scopolia japonica Maxim., commonly known as 'Mi-chi-gwang-i-pul' in Korean, were re-evaluated in comparison with results from previous research, while the distribution map was formulated according to existing flora and voucher specimens. The result of the re-evaluation has shown that there are some distinctive discrepancies compared to the previous reports of some characteristics such as the color of the basal stem, numbers of lateral veins, apex shape of calyx and corolla including the color of corolla. The Korean Scopolia japonica Maxim is found throughout Korea except Jeju-do province. The intra-specific species such as S. parviflora (Dunn.) Nakai, S. lutescens Y.N. Lee and S. kwangdokensis Y.N. Lee were treated as synonyms of S. japonica Maxim. in this research.

• Corrosion Science and Technology
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• v.10 no.1
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• pp.30-36
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• 2011

The effect of dynamic flow or forced convection were investigated and compared on the formation of inhibition layer, galvanizing and galvannealing reactions through the hot-dip galvanizing simulator with the oscillation of specimen in zinc bath, continuous galvanizing pilot plant with zinc pumping system through the snout and continuous galvanizing operation with Dynamic $Galvanizing^{TR}$ system. The interfacial Al pick-up was not consistent between the results of simulator, pilot plant and line operation, but the morphology of inhibition layer became compact and refined by the forced convection. The growth of Fe-Zn intermetallics at the interface was inhibited by the forced convection, whereas the galvannealing rate would be a little promoted.

• Journal of Plant Biology
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• v.35 no.2
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• pp.173-182
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• 1992

The parasitic flowering plants obtain nutrients and water from their host plants through a parasitic organ, haustorium, which connects both structurally and physiologically host and parasite. The parasitism in angiosperms thus can be understood from the knowledge of the haustorial structure. The haustoria have evolve convergently and independently in several unrelated taxa; therefore, they have similar morphology. Many anatomical studies on the haustoria in several parasites in the pst have been carried out by light microscopy. Ultrastructural studies on the haustoria, which are started from the end of 1060s', have provided new information relating to the phenomenon of parasitism in angiosperms. The purpose of this paper is to introduce and compare the structure of haustoria between parasitic plants. The results may help an understanding of phylogenetic relationships of parasitic angiosperms. The haustoria of some families, such as Santalaceae, Orobancaceae, Scrophulariaceae, Loranthaceae (or Viscaceae), and Convolvulaceae (Cuscuta) will be discussed.

• Journal of Plant Biology
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• v.38 no.3
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• pp.297-303
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• 1995

Four species of Symphyocladia growing along the coast of Korea were investigated in taxonomic point of view. Characters available for identification of the species were; difference in gross morphology, degree of cortication in vegetative axis, presence or absence of vegetative trichoblasts, and developmental pattern of stichidia. Vegetative structure and reproductive organs in developmental anatomy were similar among species. Branching pattern and occurrence of vegetative trichoblasts adopted for systematic criteria between Pterosiphonieae and Polysiphonieae, and between Symphyocladia and Pterosiphonia were no more confidential. The degree of congenital fusion of laterals with the parent axes was considered as only main character to distinguish Symphyocladia from Pterosiphonia.

• Journal of Plant Biology
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• v.38 no.2
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• pp.159-164
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• 1995

The taxonomic note was given to the species of Ceramium from Ullungdo Island. Five species, Ceramium aduncum Nakamura, C. codii (Rhichards) G. Mazoyer, C. flaccidum (Harvey exK tzing) Ardissone, C. paniculatum Okamura, and C. tenerrimum (Martense) Okamura were collected during this study. C. aduncum was collected in the intertidal and upper subtidal zones from December to Feburary. They had a narrow internodal space showing 1/3-1/5 times as large as nodal band. C. codii had the spermatangial mother cells developed on abaxial cortical cells of cortical band C. paniculatum collected in summer and winter had a creeping thallus and alternative branching type in gross morphology. The axial cell of C. flaccidum showed 2.3-2.8 L/B ratio, smaller than those of plants from Chejudo Island.

• Journal of Plant Biology
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• v.38 no.2
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• pp.181-193
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• 1995

Cuticle micromorphology of four families of Korean gymnosperms, Cycadaceae, Ginkgoaceae, Taxaceae, and Cephalotaxaceae, were studied with scanning electron microscopy. The outer and inner features of abaxial and adaxial cuticles were described in details; the absent or present of Florin ring, orifice, trichome, and plug and their shape, the shape and periclinal and anticlinal wall sculpture of epidermal cells, the shape of cuticular flange of epidermal cell, guard cell, and subsidiary cell, the number of stomatal bands and rows, and stomatal apparatus including the shape of polar extension, number of subsidiary cells, the sculpture of guard cell and subsidiary cell. Most of these features have not been sufficiently substantiated by the previous reprots. Furthermore, all the species investigated showed distinctive cuticle morphology with morphological and taxonomical informations.