• Journal of Ginseng Research
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• v.4 no.1
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• pp.16-30
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• 1980

In order to increase the production of ginseng, a cultural experiment was carried out under different types of natural forest condition. Seedlings were transplanted with three spacing (70,90 and plants per 1.62m2) under the broad leaved, needle and mixed forest. The obtained results are as follows. 1 Growth of aerial part of ginseng plant. 1) Vegetative growth under forest condition of very poor as compared with ordinary cultivation, but there was no significant in number of leaf and teasel. 2) Stem diameter and stem length under the different forest types were a little difference. However petiole length and number of leafet showed an increasing trend in broad leaved forest as compared with other forest types. 3) The withering date of aerial part of ginseng plant in the needle forest was later than of others. 2. Fresh weight of ginseng root per plant was decreasing in the order of broad leaved forest, needle and mixed forest, needle and sized forest respectively. However the root weight was much smaller than that of ordinary cultivated one. 3. No big difference was observed in the growth of both aerial and root among the planting density 4. Nitrogen content in ginseng root under forest was lower, but calcium content In root was higher than that of ordinary one. 5. Fat and fiber content of ginseng root under forest showed higher than that of ordinary one. 6. The saponin content of ginseng root grown under forest condition was higher than that of ordinary ginseng root. According to high performance liquid chromatogram of saponin, only difference from ordinary cultivated ginseng root was that ginsenoside Re showed higher peak than ginsenoside Rg1.

• Journal of Microbiology
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• v.40 no.2
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• pp.109-118
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• 2002

The present work is aimed at providing additional new pure cultures of oxalate utilizing bacteria and its preliminary characterization for further work in the field of oxalate-metabolism and taxonomic studies. The taxonomy of 14 mesophilic, aerobic oxalotrophic bacteria isolated by an enrichment culture technique from soils rhizosphers, and the juice of the petiole/stem tissue of plants was investigated. Isolates were characterized with 95 morphological, biochemical and physiological tests. Cellular lipid components and carotenoids of isolates were also studied as an aid to taxonomic characterization. All isolates were Gram-negative, oxidase and catalase positive and no growth factors were required. In addition to oxalates, some of the strains grow on methanol and/or formate. The taxonomic similarities among isolates, reference strains or previously reported oxalotrophic bacteria were analysed by using the Simple Matching (S/ sub SM/) and Jaccard (S$\_$J/) Coefficients. Clustering was performed by using the unweighted pair group method with arithmetic averages (UPGMA) algorithm. The oxalotrophic strains formed five major and two single-member clusters at the 70-86% similarity level. Based on the numerical taxonomy, isolates were separated into three phenotypic groups. Pink-pigmented strains belonged to Methylobacterium extorquens, yellow-pigmented strains were most similar to Pseudomonas sp. YOx and Xanthobacter autorophicus, and heterogeneous non-pigmented strains were closely related to genera Azospirillum, Ancylobacter, Burkholderia and Pseudomonas. New strains belonged to the genera Pseudomonas, Azospirillum and Ancylobacter that differ taxonomically from other known oxalate oxidizers were obtained. Numerical analysis indicated that some strains of the yellow-pigmented and nonpigmented clusters might represent new species.

• Journal of the Korean earth science society
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• v.29 no.4
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• pp.319-327
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• 2008

A paleobotanical study of the Metasequoia has been carried out from the Miocene Keumkwangdong Formation of the non-marine Janggi Group in the Pohang Basin. As a result of this study, deciduous leafy shoots mostly belong to a single species of Metasequoia occidentalis. This species is characterized by its opposite leaves with decurrent base, and by its presence of scale leaf at base of petiole. This species is common in the Korean Tertiary floras in Miocene age, yet it has not been recorded in the Korean Peninsula after Miocene. Based on the distribution and ecology of extant Metasequoia. it is considered that the Metasequoia might have flourished in the fluvial plains as swamp forest.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.2
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• pp.167-172
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• 1986

This experiment was carried out to obtain some information about the growth habit and morphological and anatomical characteristics of fasciated soybean, var. Buchai-kong. The results obtained are summarized as follows: 1. Main stern of fasciated soybean, var. Buchai-kong was gradually broadened and became flat, on which leaves emerged irregularly compared with normal soybean, var. Danyeop-kong. The number of leaves on main stern was more in Buchai-kong, but the total number of leaves per plant was not considerably different each other. 2. The degree of fasciation (max./min. in diameter at the broadened part) in main stern of Buchai-kong was about 3.1, and was related to the amount of growth of main stern and branches of Danyeop-kong. Stern fasciation types found in Buchai-kong were linear (the most common) and bifurcated with regard to branching of main stern tip. 3. The number of branches per plant was much less in Buchai-kong than in Danyeop-kong. There were fas-ciated branches and fasciated petiole in Buchai-kong. 4. About 75 percent of pods of Buchai-kong were concentrated on the top of stern, which showed strong pod clustering. 5. Seed yield per plant of Buchai-kong was about 60 percent of that of Danyeop-kong, and the decrease in seed yield was mostly affected by the decrease in seed weight and seeds per pod. 6. The number of vascular bundles of transection of mature stern was more in Buchai-kong, but Danyeop-kong developed the better vascular bundle.

• Korean Journal of Medicinal Crop Science
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• v.4 no.1
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• pp.1-6
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• 1996

This environment of native area and growth characteristics by different age of dendropanax morbifera was grown wild widly at Wando area, particularly, distribution frequency was high at 50 to, 150 meters above the sea level, and configuration of the ground of native area descended slowly toward the southeast. The Soil characteristics of native area was $pH\;5.3{\sim}5.4,\;8.4{\sim}9.8%$ in organic matter content and $18.2{\sim}21.3%$ in soil moisture. The flowering of dendropax morbifera was began at 6 years old tree, and flowering time was at middle of July. The growth characteristics of 6 years old tree was 129cm in stem height, 34mm in stem diameter, 15.4 in number of leaf, and 12.9 cm in petiole length.

• Korean Journal of Plant Tissue Culture
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• v.28 no.2
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• pp.91-95
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• 2001

Propagules grown at different in vitro culture conditions such as heterotrophic, mixotrophic and photoautotrophic conditions were investigated for growth, total photosynthesis ratio and flowering. Survival rate of propagules after transplanting was higher in photoautotrophic propagules than in the heterotrophic and mixotrophic ones. Total photosynthesis was higher plantlets growth in photoautotrophic (154 mg$CO_2$.mgDW$^{-1}$ h$^{-2}$ ) those grown than in mixotrphpic (148 mg$CO_2$.mgDW$^{-1}$ h$^{-2}$ ) and heterotrophic (102 mg$CO_2$.mgDW$^{-1}$ h$^{-2}$ ) 30 days after transplanting into fields. Day to flowering of the plant cultured in photoautotrophic condition was shortened by 7~10 days than those of heterotrophic and mixotrophic ones. Length of the petiole, number of leaves, leaf area and chlorophyll content were also increased.

• Korean Journal of Breeding Science
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• v.42 no.6
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• pp.664-667
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• 2010

A new poinsettia cultivar 'Clara' was bred by the National Institute of Horticultural and Herbal Science (NIHHS) in 2005. A cross was made between 'Red Velvet', a variety with dark green leaves and red bracts, and 'Freedom Bright Red', a variety with early short day responding and bright red bracts, in 2002. 'Clara' was finally selected in 2005 after the investigation of the growth and flowering characteristics from 2003 to 2005. 'Clara' has red ovate bracts and weak intensity of rugosity between bract veins. Leaf blade is ovate and medium green. Petiole length is relatively short, and stem color is reddish. 'Clara' has medium free-branching ability and makes short and compact canopy. Clara's bracts and transitional leaves are fully colored 9 weeks after short day commencement.

• Korean Journal of Breeding Science
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• v.42 no.6
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• pp.611-614
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• 2010

A new poinsettia cultivar 'Heidi' was bred by the National Institute of Horticultural and Herbal Science (NIHHS) in 2004. A cross was made between 'Freedom Rose', a variety with vigorously growing deep pink color, and 'Red Velvet', a variety with dark green leaves and red bracts in 2001. 'Heidi' was finally selected in 2004 after the investigation of the growth and flower characteristics from 2002 to 2004. It has velvety red colored elliptic bracts and transitional leaves, and medium intensity of rugosity between bract veins. Leaf blade is dark green, ovate shape and lobes are shallow. Petiole length is relatively short and stem color is reddish. 'Heidi' has free-branching ability and plant height is short. The bracts and transitional leaves are fully colored 7.5 weeks after short day commencement.

• Korean Journal of Breeding Science
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• v.40 no.2
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• pp.201-205
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• 2008

'Morningpurple' is a new sweetpotato variety developed by Mokpo Experiment Station, National Institute of Crop Science (NICS), RDA in 2007, for flowering. This variety was selected from the cross between Sinchunmi and Hi-dry in 2004, seedling and line selections were practiced from 2005 to 2006. 'Morningpurple' has morning glory type flowers with purple color. It has triangular leaf, green with purple vine and petiole, elliptic storage root, red skin and yellow flesh color of storage root. The average yield of storage root was 15.0 ton/ha. Number of storage roots over 50 gram per plant was 2.6, and the average weight of storage root was 143 gram.

• Korean Journal of Breeding Science
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• v.43 no.6
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• pp.568-571
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• 2011

A new poinsettia cultivar 'Green Dream' was bred by the National Institute of Horticultural and Herbal Science (NIHHS) in 2009. A cross was made between 'Lemon Snow', a variety with dark green leaves and light yellow-green bracts, and 'Freedom Rose', a variety with vigorously growing deep pink bracts in 2006. 'Green Dream' was finally selected in 2009 after the investigation of the growth and flowering characteristics from 2007 to 2009. 'Green Dream' has light yellow-green ovate bracts and medium intensity of rugosity between bract veins. Leaf blade is ovate and dark green. Petiole length is long, and stem color is greenish. 'Green Dream' has medium free-branching ability and long plant height. 'Green Dream's bracts and transitional leaves are fully colored 7 weeks after short day commencement.