• Korean Journal of Breeding Science
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• v.42 no.6
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• pp.595-599
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• 2010

A new spray chrysanthemum cultivar 'Prima Donna' was released by National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), in 2008. The cross was made between 'Plano' and 'Yeonja' in 2005. Trials were conducted from 2006 to 2008 for the evaluation and selection of this cultivar, including shading cultures in summer and retarding cultures in spring. The natural flowering time of 'Prima Donna' is late October, but year-round flowering is possible by photo-periodic control. The cultivar has single type flowers with pink petals, green center and good inflorescence. The growth of plant is very vigorous. The diameter of flower is 7.0cm. The number of flowers per stem and petals per flower are 13 and 42, respectively. Days to flowering under the short day treatment is about 59 and its vase life is 26.1 days in autumn season.

• Korean Journal of Environmental Agriculture
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• v.37 no.4
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• pp.312-316
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• 2018

BACKGROUND: Yeast biotechnology finds applications in various industries. Hence, we sought to explore the yeasts associated with the flower of Aster spathulifolius Maxim. This study aimed to isolate yeasts from the flower of the plant and screen for biosurfactant-producing yeasts. METHODS AND RESULTS: We collected flowers of Aster spathulifolius Maxim. and performed pure isolation using four types of media. In total, 117 strains belonging to 4 genera, namely, Cryptococcus (75 strains), Aureobasidium pullulans (30 strains), Candida (11 strains), and Rhodotorula (1 strain), were isolated and identified by ITS sequencing. Upon in-depth analysis, Cryptococcus, the most dominant genus (75 strains) was categorized into the 'Unknown group'. Upon in-depth analysis of A. pullulans, we discovered the 'Unknown group I' (27 strains) and the 'Unknown group II' (2 strains), which have not been reported previously. Two A. pullulans isolates with potent surfactant activity were selected via the screening procedure. CONCLUSION: In this study, a total of 117 strains were isolated from the flower of Aster spathulifolius Maxim. In addition, two biosurfactant-producing yeasts were identified from among the isolated yeasts.

• Applied Biological Chemistry
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• v.47 no.3
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• pp.357-360
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• 2004

The flower of Campsis granudiflora K. Schum. was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2O$. From the EtOAc fraction, four compounds were isolated through the repeated silica gel and ODS column chromatographies. From the result of physico-chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as linolenic acid methyl ester, linoleic acid methyl ester, ${\beta}-sitosterol$ and daucosterol. Daucosterol inhibited FPTase activity with $IC_{50}$ values of $14{\pm}0.04\;{\mu}M$.

• Korean Journal of Plant Resources
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• v.18 no.2
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• pp.246-250
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• 2005

This study carried out to compared a rutin content in seed and plant of tartary buckwheat(Fagopyrum tataricum) to collect in the world. Rutin content in seed and plant parts of tartary buckwheat is higher than F. esculentum and F. cymosum. Rutin contents in plant parts of 3 species was higher with order of flower> leaf> seed> stem> root and that of tartary buckwheat was higher about 3.2 times in flower and about 3.1 times in stem and about 65 times in seed of F. esculentum. Compared to rutin contents for seed color and shape of tartary buckwheat 50 lines, seed color was higher with order of dark gray>black>brown and seed shape was higher with order of Slender> Notched> Round. Rutin content in plant parts of cultivated lines was higher than wild lines. Compared to rutin contents in plant parts of tartary buckwheat collected at the different region, Bhutan line had much higher than other lines. Rutin contents were lower than in the leaf and stem of Pakistan line and in the seed of India line.

• Horticultural Science & Technology
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• v.33 no.3
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• pp.453-458
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• 2015

A new Hibiscus cultivar 'Daewangchun', having vigorous growth, uniform plant habit, upright, compact branches, and a long red eye was developed through interspecific crosses between H. syriacus 'Samchully' (♀) and H. sinosyriacus 'Seobong' (♂). The Hibiscus breeding program was initiated in 2005 and Hibiscus ${\times}$ 'Daewangchun' was preliminarily selected as '05-R-204' in 2 008 due to its vigorous growth and stable flower quality w ith rich pink flowers. The s elected line was further evaluated for different growth characteristics, leaf shape, leaf size, and flowering characteristics, as well as tested for distinctness, homogeneity, and stability during 2010-2012. The new cultivar 'Daewangchun' had violet pink flowers (RHS N80C) with a long red eye spot, medium size and fan petals. The size of flower was 12.0 cm and size of the red eye was 3.0 cm. Leaves were 8.7 cm long and 4.7 cm wide. After plant characteristic evaluation for 3 years (2010-2012), 05-R-204 was registered as cultivar 'Daewangchun' (4731, No. of plant variety protection rights) in 2013. This newly developed cultivar 'Daewangchun' has tall vigorous growth and unique flowers with a long red eye and can be used as specimen plants in landscaping.

• The Plant Pathology Journal
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• v.17 no.6
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• pp.347-349
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• 2001

Black blights attacked the blossom and flower buds of wild chrysanthemum (Chrysanthemum boreale) in the experimental field in Hamyang in 1998. The infection rate of the disease on the plant ranged from 4.0 to 91.8%. The pathogen isolated from the infected flower buds produced numerous conidia in pycnidia. The pycnidia, which were immersed into the petals, emerged through the epidermis by short ostiolate neck. Conidia had 0-3 septate (mostly uniseptate) and were 10-27.5 $\times$5-7.5 ㎛ in size. The fungus produced pseudothecia on potato dextrose agar (PDA), and uniseptate ascospores produced in asci were 10$\times$2.7 ㎛ in size. The pathogen also produced pycnidia and pycnidiospores on PDA after 4 weeks in the dark condition. The conidia produced on PDA were smaller than those from infected plants. Based on the examined mycological characteristics, the fungus was identified as Didymella chrsanthemi.

• Journal of Plant Biotechnology
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• v.43 no.4
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• pp.438-443
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• 2016

The in vitro propagation of the commercially important Phalaeonopsis hybrid 'Little gem' was achieved by culturing the apical part and axillary buds excised from flower stalks. The explants were cultured on 5 different basal media: $3.0{\cdot}L^{-1}$ Hyponex and $4.0{\cdot}L^{-1}$ peptone ($H_3P_4$) and Murashige & Skoog (MS) media were shown to be suitable for shoot regeneration. The MS medium supplemented with $5.0mg{\cdot}L^{-1}$ 6-benzylaminopurine (BA) was found to be more efficient for shoot regeneration. However, the number of shoots induced by axillary buds was higher than that induced by the apical part. Incubation of the apical part under darkness for one week, as well as of the explants in the same medium with activated charcoal (AC) $0.5g{\cdot}L^{-1}$ promoted shoot regeneration and shoot growth; similar growth was not observed with axillary buds.

• Journal of Applied Biological Chemistry
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• v.42 no.1
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• pp.40-44
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• 1999

The in vitro antioxidative activities of the 33 plant-derived essential oils and 37 phytochemicals including 3 Mentha arvensis leaf-, 2 Thymus vulgaris leaf- and 2 Syzygium aromaticum flower-derived isolates were determined by the inhibition of linoleic acid autoxidation, the generation of superoxide anion and scavenging of DPPH radical. They were then compared to those of the widely used plant-derived antioxidants (pyrogallol and quercetin) and synthetic antioxidant BHT. At a concentration of 0.01%, potent antioxidative effect was observed in the essential oils from Cinnamomum cassia roots, Mentha arvensis leaves, Ginkgo biloba fruits, and Syzygium aromaticum flowers. Of the phytochemicals used, eugenol and isoeugenol at 0.01% showed potent antioxidative activity, and their activities were comparable to those of pyrogallol, quercetin, and BHT. The Cinnamomum root-, the Mentha leaf-, the Ginkgo fruit-, and the Syzygium flower-derived materials may be a good source for an alternative to the currently used antioxidants.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2002.11b
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• pp.15-15
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• 2002

In higher dicotyledonous plants, the floral organs are arranged in four different whorls, containing sepals, petals, stamens and carpels. petals, stamens and carpels. The specification of floral organ identity is explained by the ABC model (Weigel and Meyerowitz 1994). Expression of an A-function gene specifies sepal formation in whorl 1. the combination of A-and B-function genes specifies the formation of petals in whorl 2, B-and C-function genes spesify stamen formation in whorl 3, and expression of the C-function alone determines the formation of carpels in whorl 4. A-. B-, C-function genes have been isolated from many plant species and most of them belong to the family of MADS-box genes encoding transcription factor. In contrast to the flower of higher dicots, the perianths of genseng plants have three whorls of almost identical petaloid organs. van Tunen et al. (1993) proposed a modified ABC model, exemplified with tulip. In this model, B-function genes are expressed in whorl 1 as well as whorl 2 and 3, theefore the organs of whorl 1 and whorl 2 have the same petaloid structure. They proposed this model with the molphological data of wild type and mutant flowers of tulip, however, there are no molecular data.(중략)

• Journal of the Korean Society of Tobacco Science
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• v.7 no.2
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• pp.111-121
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• 1985

The present study was carried out to obtain some basic informations of the breeding of tobacco varieties. Genetically divergent 8 varieties, 3 flue-cured, 2 burley and 3 sun-cured tobaccos, were used in half diallel cross. In order to analyze the heterosis, combining abilities, modes of inheritance and correlations for some agronomic and chemical characters, 8 parents and 28 $F_2$ were tested. The results obtained were summarized as follows: The percentages of heterosis for yield, stem diameter, internode length and total sugar content in $F_2$ hybrid were positive , where-as those for the other characters were negative. Yield had significant positive genotypic and phenotypic correlations with plant height, days to flower, leaves per plant, leaf length, leaf width and leaf shape index (Leaf length/leaf width). General (GCA) and specific combining abilities (SCA) for all characters of $F_2$ hybrid were significant. In the effect of GCA, yield was greater in combinations of Bulgaria and Xanthi, days to flower and leaves per plant were those of Burley 21 and Va 528, leaf length and width were those of Coker 139, respectively. In the effect of SCA, the major part of characters were greater than those of others in the combinations of Burley 21, Va 528, Hicks.