• Title/Summary/Keyword: orchid culture

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Ex situ acclimatization of asymbiotically germinated seedlings of endangered lady's slipper orchid(Cypripedium macranthos Sw.) (멸종위기종 복주머니란 발아특성 및 실생묘 현지외 적응성 검토)

  • Lee, Joung Kwan;Kwon, Young Hee;Kim, Hee Kyu;Kim, Kyung Ok;Park, Jae Seong;Jeong, Mi Jin;Son, Sung Won;Suh, Gang Uk
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2018.10a
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    • pp.37-37
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    • 2018
  • We use two different methods for laboratory propagation from seed of lady's slipper orchid(Cypripedium macranthos Sw.); immature seed which also called green capsule or fully mature seed about 120~130 days from pollination. In green capsule culture, the seed pods should be collected within precisely right time. The right time of seed collection could be diverse under the wether conditions or nutritional factors of the plants. In fully matured seed culture, the more complicated procedures are needed to break the dormancy of the seed; thermal or chemical treatment. The seedlings in this study were easily germinated from immature seeds in Harvais medium; 53 days after pollination(DAP) in Cypripedium pubescens, DAP 65 in C. parviflorum and C. macranthos. The germinated seedlings were transplanted to hormone free media immediately to avoid abnormal growth of seedlings. When the seedlings have roots with a minimum length of around 2-3cm and have visible dormant buds, the seedlings were removed from the flask and stored in refrigerator for vernalization. To examine the correlation of seedlings and maternal plants, the 125 seedlings of C. macranthos were transplanted in the soil bed at a distance of 20-100 cm from mother plants on April 20. The survival rate of seedlings were 92% in 20 cm distance from the ripe plants, and 56 % in 100 cm distance. The seedlings which were transplanted near mother plants showed vigorous growth in plant height, leaf width, and especially dormant buds. Considering the existence of mycorrhiza which is a symbiotic association between a fungus and the roots of a orchid vascular, the various fungus from mother plants could affect the growth of the seedlings. These results indicate the possibility of high and stable production and practical industrialization of endangered lady's slipper orchids.

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Asymbiotic seed germination and in vitro propagation condition in Calanthe discolor Lindl.

  • Kwon, Huyk Joon;Shin, So Lim;Bae, Kee Hwa;Kim, Soo-Young
    • Journal of Species Research
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    • v.6 no.1
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    • pp.68-75
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    • 2017
  • We investigated the effects of sodium hypochlorite (NaOCl) and culture medium on embryo swelling and germination of Calanthe discolor Lindl., and established a method for determining the swelling and protocorm formation of C. discolor seeds via in vitro examination of immature seeds. Treatment of immature seeds with NaOCl greatly enhanced the extent of embryo swelling and protocorm formation of immature zygote embryos compared to seeds without NaOCl treatment. The effects of the culture media were also evaluated with regard to embryo swelling and protocorm formation of in vitro cultured seeds with and without NaOCl treatment. Additionally, the effects of white fluorescent light and red and blue LEDs lights on seedling growth in in vitro culture were examined. The most suitable condition for seedling growth after 12 weeks of culture was the red LEDs light with POM medium. These results show effective asymbiotic germination and growth of C. discolor.

Propagation of asymbiotically germinated seedlings with liquid culture for endangered lady's slipper orchid (Cypripedium macranthos Sw.) (액체배양 방법을 이용한 멸종위기종 복주머니란 종자 무균발아 및 증식)

  • Lee, Joung Kwan;Huh, Yoon Sun;Park, Sang Im;Park, Jae Seong;Jeong, Mi Jin;Son, Sung Won;Suh, Gang Uk
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2018.04a
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    • pp.45-45
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    • 2018
  • We had already reported the successful germination for green pods of purple lady's slipper orchid (Cypripedium macranthos Sw.). The green pod methods is to take immature seeds in green capsules, sterilize the capsule, and take out the sterile seeds. This method, however, needs very critical time of harvest. The critical time of seed harvest changes depending upon the species, condition of the specimen, and climatic influence, and the right time lies between 5 and 12 weeks after fertilization. In this study, the mature seeds were collected after 120-130 days with hand-polination of lady's slipper orchids. Mature seeds are usually dormant and it has to be overcome, either with hormone or storing the seeds near freezing for two or three months to break dormancy. The seeds were first surface sterilized with 70% ethanol and then transferred 1% NaOCl for 10-15 minutes, followed by rinses 3 times with sterilized distilled water. The cypripedium seeds consists of an embryo within a seed coat known as a testa. The testa is water repellent and the seed has a large air space between the embryo and testa so the seed tends to float on water. We had resolved the problems with vacuum pump to soak water into the testa before sterilization. The seeds were placed on liquid or agar solidified germination media. Cultures were incubated at $24{\pm}1^{\circ}C$ in dark. The seeds were germinated in 6-8 weeks in liquid suspension culture (germination percentage over 18%); however, the seeds on agar solidified media took more than 5 months to germinate and the germination percentage less than 5%. The most effective media for liquid culture was 1/4 strength Murashige and Skoog (MS) medium with 50 ml/l coconut water ($4brix^{\circ}$) at pH 5.8.

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Biocontrol of Orchid-pathogenic Mold, Phytophthora palmivora, by Antifungal Proteins from Pseudomonas aeruginosa RS1

  • Sowanpreecha, Rapeewan;Rerngsamran, Panan
    • Mycobiology
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    • v.46 no.2
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    • pp.129-137
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    • 2018
  • Black rot disease in orchids is caused by the water mold Phytophthora palmivora. To gain better biocontrol performance, several factors affecting growth and antifungal substance production by Pseudomonas aeruginosa RS1 were verified. These factors include type and pH of media, temperature, and time for antifungal production. The results showed that the best conditions for P. aeruginosa RS1 to produce the active compounds was cultivating the bacteria in Luria-Bertani medium at pH 7.0 for 21 h at $37^{\circ}C$. The culture filtrate was subjected to stepwise ammonium sulfate precipitation. The precipitated proteins from the 40% to 80% fraction showed antifungal activity and were further purified by column chromatography. The eluted proteins from fractions 9-10 and 33-34 had the highest antifungal activity at about 75% and 82% inhibition, respectively. SDS-PAGE revealed that the 9-10 fraction contained mixed proteins with molecular weights of 54 kDa, 32 kDa, and 20 kDa, while the 33-34 fraction contained mixed proteins with molecular weights of 40 kDa, 32 kDa, and 29 kDa. Each band of the proteins was analyzed by LC/MS to identify the protein. The result from Spectrum Modeler indicated that these proteins were closed similarly to three groups of the following proteins; catalase, chitin binding protein, and protease. Morphological study under scanning electron microscopy demonstrated that the partially purified proteins from P. aeruginosa RS1 caused abnormal growth and hypha elongation in P. palmivora. The bacteria and/or these proteins may be useful for controlling black rot disease caused by P. palmivora in orchid orchards.

Optimization of Embryogenic Callus Induction and Plant Regeneration in Orchid Coelogyne cristata

  • Naing, Aung Htay;Lim, Ki-Byung
    • Horticultural Science & Technology
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    • v.29 no.3
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    • pp.260-266
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    • 2011
  • An efficient protocol was established for high frequency somatic embryogenesis through a callus culture of Coelogyne cristata. The best frequency of callusing was obtained from a PLB segment (3-5 mm) cultured on MS medium supplemented with coconut water (CW) and a combination of both 3 $mg{\cdot}L^{-1}$ of 2,4-D and BA. When the calli were sub-cultured on the MS medium without any PGRs, the average number of somatic embryos were higher than those with PGRs treatment. NAA is the most critical factor among PGRs, which dramatically hindered for the formation of a somatic embryo. The efficacy of the addition of coconut powder (CP) for somatic embryogenesis was almost the same in all treatments. However, the number of somatic embryos formed distinctly depended on age of the callus. The somatic embryos converted into healthy plants with well-developed shoots on the same medium. Plantlets showed the best responses of root and shoot growth when transferred to $\frac{1}{2}$ MS medium containing 1.5 $g{\cdot}L^{-1}$ of activated charcoal. All plants with above 3.0-cm-high were successfully acclimatized in the greenhouse.

Cymbidium Hybrid 'Purple Princess' with Dark Purple Flower (진한 자주색계 중형 심비디움 'Purple Princess')

  • Kim, Mi-Seon;Jeong, Myeong-Il;Lee, Young-Ran
    • Horticultural Science & Technology
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    • v.28 no.4
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    • pp.715-718
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    • 2010
  • $Cymbidium$ 'Purple Princess' ('Show Girl' x 'Eiko') is a new cultivar having dark purple sepal and petal (RHS, RP59A) with purple lip (RHS, RP59A). A cross was made between pink colored $C.$'Show Girl' as maternal line and dark purple colored $C.$ 'Eiko' as paternal line in 1994. It was preliminarily selected as Line No. 94019267 in 1999 considering the characters of flower shape and color, leaf growing shape and growth habit in normal culture condition. Multiplication, cultivation, and characteristic trials were conducted from 2000 to 2003. The line was named as Wongyo F1-7 and phenotype was characterized in 2004 as a new 'Purple Princess'. 'Purple Princess' has about 13.2 flowers per flower stalk and flower size of 5.2 cm. General appearance of petals and sepals is slightly incurved shape. The plant size is intermediate having erect peduncle. Blooming starts from early December under optimal culture condition. Leaf attitude and twisting is erect and very weak respectively. Erect leaf will be suitable for growing and handling in the nursery as pot orchid flowers.

Clonal Propagation through Leaf Sheath Culture of Phalaenopsis

  • Jo, Man-Hyun;Ham, In-Ki;Lee, Mi-Ae;Han, Gyu-Heung;Woo, In-Shik
    • Plant Resources
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    • v.5 no.3
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    • pp.176-180
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    • 2002
  • This study was conducted to develop the clonal propagation technique through in vitro culture using by leaf sheath explants of Phalaenopsis grown in vitro. The highest frequency of protocorm-like body (PLB) formation was obtained when explants of leaf sheath were cultured on VW medium containing 30g/L sucrose, 500 mg/L activated charcoal, 150 mVL coconut water, 1 mg/L NAA, 1 mg/L 2ip and 2.5 g/L gelrite. The PLB formation rate of VW medium was highest followed by modified Hyponex medium, and lowest in MS medium. Plantlets induced from PLBs transferred to plastic pots including spagnum moss were well developed.

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Ahn Min-young's Jade-like Sijo, Emotion Coding by Orchid

  • Park, Inkwa
    • International Journal of Advanced Culture Technology
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    • v.7 no.1
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    • pp.199-208
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    • 2019
  • Today, mankind is falling in serious stress. So there are various way that heal men as human psychology, philosophy, medical science etc. And in recent years, interest in literature therapy has been focused to heal the human sense of spirit. In the future, we will be able to treat our spirit sense with AI Emotion. The treatment process can be induced by the system of emotion coding which AI Emotion deliver Emotion signals to Human body. For this study, we used the Ahn Min-young's Sijo. The reason is that his Sijo is useful this study of the Emotion Coding. As the result, Ahn Min-young's emotion coding created the codes as if amino acid codes. We must continue this research. Then our literature therapy could grow and contribute to human well-being.

In Vitro Shoot Tip Culture of Haemaria discolor (Haemaria discolor 경정의 기내배양)

  • 왕영조;정재동;최수옥;지선옥
    • Korean Journal of Plant Tissue Culture
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    • v.21 no.4
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    • pp.227-231
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    • 1994
  • The experiments were conducted to obtain culture conditions on optimal cultural conditions for propagation of a topical orchid, Haemaria discolor, through shoot tip cultrue in vitro. Survival percentage of shoot tip explant, in initial culture media was higher in H$_3$P$_4$ medium than in Murashige and Skoog's medium. Explants, cultured in H$_3$P$_4$ medium containing 1.0 mg/L kinetin, showed more shoot elongation when compared with those on other media. When the distal part of stem (pseudobulb) was longitudinally sectioned into half and cultured in H3P4 medium containing 0.1 mg/L 2ip, 0.1, or 1.0 mg/L kinetin, shoots from axillary bud were much more elongated under light condition.

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Shoot regeneration from internode sections of Ardisia pusilla DC.

  • Lee, Su-Young;Kim, Young-Soon;Han, Bong-Hee
    • Journal of Plant Biotechnology
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    • v.35 no.3
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    • pp.209-213
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    • 2008
  • This study was conducted to regenerate shoots from internode sections(about 1mm in thickness) of Ardicia pusilla de Candolle. Internode sections were cultured on MS medium supplemented with TDZ or both TDZ and IBA. At one month after culture, primodium, which looks like protocorm like body(PLB) of orchid, appeared around swollen internodes. And then it grew and changed into the shape similar to granule of orange at two or three months after culture. At four to five months after culture, explants covered with them became a cluster, and then multiple shoots were regenerated from them. Primodia formation was the best when internode was cultured on MS medium supplemented with 0.25 $mg{\cdot}L^{-1}$ thidiazuron(TDZ) and 0.5 $mg{\cdot}L^{-1}$ indole-3-butyric acid(IBA). That internodes were cultured on MS medium supplemented with either higher concentration of TDZ than that of IBA, or equal concentration of TDZ and IBA, or TDZ only was little effective for primodia formation.