• Research in Plant Disease
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• v.9 no.2
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• pp.72-78
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• 2003

Eight fungicides including prochloraz, tebuconazole, benomyl, mancozeb, thiophanate-methyl, azoxystrobin, and fluazinam were examined for their control effects on Fusarium bulb and root rot of oriental orchid, Cymbidium goeringii. Among the chemicals, prochloraz and tebuconazole were the most effective on suppression of the causal pathogen, F. oxysporum in vitro and on control of the disease in vivo. Prochloraz and tebuconazole inhibited mycelial growth of the fungi 95~100% at 10ppm a.i. and microconidial germination 75~100% at 100ppm a.i. Prochloraz and tebuconazole showed 80~92% and 84~88% protective control value on the disease, respectively. However, curative effects on infected orchid were relatively low. Other chemicals showed no or lower than 20% curative and 50% protective control value. Results indicated that prochloraz and tebuconazole can be used for the control of the Fusarium bulb and root rot of oriental orchids. However, the chemicals need to be applied prior to the disease development to achieve successful control efficacy.

• Horticultural Science & Technology
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• v.34 no.2
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• pp.331-341
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• 2016

We analyzed the functional fragrant components of three species of Cymbidium oriental orchids using gas chromatography-mass spectrometry (GC/MS). For the comparative analysis, C. goeringii 'Minchunran', 'Jugeumhwa', C. forrestii 'Chwigae', 'Songmae', 'Yongja', and C. faberi 'Choemae', 'Namyangmae', 'Hwaja' were investigated. Major fragrant components detected by GC/MS were selected on the basis of more than 3% value according to the analysis of peak area (%). We found that ${\alpha}$-bergamotene, which has a cytotoxic effect on breast cancer, cervical cancer, and glioblastoma, and nerolidol, which induces apoptosis of human hepatoma cells (HepG2), inhibits the growth of Streptococcus mutans and babesiosis, and has antibacterial properties, are common substances produced by C. goeringii L. Nerolidol and ${\beta}$-bisabolene, which is cytotoxic and suppresses the growth of malignant melanoma cells (B16-F10), HepG2, and leukemia cells (HL-60, K562), are major substances in C. forrestii R. Furthermore, ${\alpha}$-pinene, which inhibits the growth of gliobastoma cells (SF-767) and inhibits the anti-inflammatory action of hepatoma cells (BEL-7402); 1,8-cineole, which is a potential therapeutic agent for the treatment of gastric ulcers; and 1,3,7-octatriene, which functions as a pheromone, are the most common substances in C. faveri R. Thus, substances identified as major fragrant components in oriental orchid species have multiple beneficial applications in human health. This research forms the basis for further studies of the roles of major fragrant components in oriental orchids.

• FLOWER RESEARCH JOURNAL
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• v.18 no.3
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• pp.201-206
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• 2010

The genetic relationship among 48 Cymbidium cultivars was analyzed using randomly amplified polymorphic DNA (RAPD) with eighty 10 mers random primers (Operon Technologies) and twelve 20 mers random primers. Forty eight Cymbidium cultivars included 34 oriental Cymbidium, 7 hybrids, and 7 western Cymbidium. 407 (9.9 per primer) and 56 polymorphic bands (9.5 per primer) were generated by polymerase chain reaction with selected thirty 10 mers primers, and nine 20 mers primers, respectively. The polymorphic fragments ranged from 0.4 to 1.5 kb in size. The dendrogram was constructed by using the UPGMA clustering algorithm based on genetic similarity. Forty eight Cymbidium cultivars were classified into four major groups at similarity coefficient value of 0.638.

• Proceedings of the Korean Society of Life Science Conference
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• 2000.09a
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• pp.41-41
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• 2000

• Plant Resources
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• v.6 no.2
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• pp.144-148
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• 2003

Germination efficiency, such as days to germination and conditions for the hybrid seeds, was tested after hybrid seeds were sown on the medium. Seeds were germinated from 67 to 126 days after seeding in all cross combinations, and germination condition was different among hybrid combinations. There was big difference on days to germination based on the different media, that is, days to germination in the hyponex medium was shorter than that in the Knudson C medium. Mutants such as MMS and NaN$_3$ were used to cause mutation. Germination occurred with 0.1 % NaN$_3$ and MMS. However, even though germination occurred in other treatments (0.01 % and 0.2% of NaN$_3$ and MMS), brownish phenomenon was intense, or did not proceed and got worse after 4-5 months of seeding. In addition, it was performed to choose appropriate medium for the growth of Cymbidium rhizome whose media adaptability is more different than other orchids. Different concentration of NAA and Kinetin was used. As a result, C. goeringii hybrid showed difference for the concentration of NAA and Kinetin combination.

• Proceedings of the Korean Society of Life Science Conference
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• 2001.09a
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• pp.63-63
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• 2001

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.39 no.1
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• pp.1-9
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• 2021

The purpose of this study is to analyze Zhangjingxiu(張敬修 1823~1864), who made Keyuan(可園) in Lingnan, China, to find out how traditional gardens were created. This study focused on the analysis of the relationship between garden designer and space creation. To this purpose, the analysis was divided into garden designer life analysis, garden making background analysis, garden analysis as a space for interaction with local artists, garden analysis as art activity space for garden designer, and garden designer's unique garden creation. the results are as follow. Zhangjingxiu was born in Dongwan City in 1823, participated in the civil war at the age of 22(1845), returned home at the age of 26(1849) and made Keyuan. However, he again went through the Opium War(1856), and at the age of 38(1861) he returned home with a war-illness. A garden designer Zhangjingxiu died at the age of 41(1864). Since Zhangjingxiu was a soldier, he healed the wounds caused by the war and created a garden in order to realize the ideal world that Zhangjingxiu normally had. The garden making background can be found in the garden's name Keyuan(可園). Zhangjingxiu tried to express in the garden the meaning of 'there is nothing possible and nothing impossible in the world' learned through the war. Therefore, Zhangjingxiu named the garden housing and the lake as Gadang(可堂), Gaheon(可軒), Gajeong(可亭), Galu(可樓), and Gaho(可湖). In addition, he returned from the war and making a garden with love and filial piety for his mother. Zhangjingxiu left many poetry and oriental paintings in Keyuan with local artists. The places created as a base as a space to interact with local artists in the garden are 'Gaheon(可軒) and Galu(可樓)', and 'Chuwoljigwan(雛月池館) and Gajeong(可亭)'. In particular, Jasudae(滋樹臺), which can produce various miniascapes of orchids, is considered to be the core space of Zhangjingxiu's artistic space. Zhangjingxiu is considered to have become a famous garden by creating a very characteristic garden using Jasudae, Sokgasan(石假山) and Baewoldae(拜月臺) on the court in front of Gadang.