• Korean Journal of Plant Resources
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• v.21 no.5
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• pp.362-367
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• 2008

In order to investigate the effect of plant growth regulators on effective in vitro micropropagation, apical meristems of Pulsatilla cernua var. koreana were cultured on Murashige and Skoog's (MS) medium with 2,4-D, NAA, TDZ and BA. Media containing 2,4-D and kinetin, 2,4-D and TDZ, NAA and TDZ were not effective on callus induction. However, embryogenic or organogenic callus was obtained on media containing NAA and BA. Especially, on MS medium with 0.5mg/L NAA and 1.0mg/L BA was optimal for a high frequency (62%) of shoot or shoot bud obtained from callus. Callus proliferation, shoot multiplication and elongation were significantly increased by adding 10% coconut water on MS media with 0.5mg/L NAA and 1.0mg/L BA. Repeated subculturing of in vitro grown shoots resulted in propagation rate of 12.9 shoots per explant every 30 days. Root formation from the adventitious shoots was not easily achieved. However, roots were only produced through callus on MS medium with 2.0mg/L NAA alone or 0.5mg/L NAA and 1.0mg/L BA. These roots were used materials for callus and shoot production repetitively.

• Journal of Forest and Environmental Science
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• v.34 no.1
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• pp.77-81
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• 2018

Mass production of forest medicinal plants is related to quality control of raw medicinal materials. Plant tissue culture is an important technology to produce high-quality plant materials. Numerous factors are reported to influence the success of in vitro regeneration of medicinal plants. Embryogenesis is known to be the most effective techniques and it has developed in some medicinal plant species. Various in vitro cultural condition for direct and/or indirect somatic embryogenesis systems have developed in Epimedium koreaum, Bupleurum falcatum, Paeonia lactiflora, Chrysanthemum zawadskii, Houttuynia cordata etc. In this study, we provide the present statue and information of in vitro propagation techniques that is able to apply as an efficient system for rootstock propagation system of forest medicinal plants.

• Journal of Plant Biotechnology
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• v.31 no.1
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• pp.61-65
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• 2004

In order to micropropagate uniform plantlets of Alocasia cadieri Chantrier in vitro, the shoot tips were cultured on media containing various concentrations of BA and thidiazuron (TDZ). Multiple shoot formation from shoot tips was very effective on medium containing 0.1mg/L TDZ. The formed shoots from shoot tips were separated into a shoot, and cultured on media with BA, TDZ, and NM combination for proliferation. The shoots were multiplied very vigorously on medium with 0.5mg/L TDZ and 0.5mg/L NAA. The rooting and growth of multiplied shoots were more effective on medium with 2.0g/L activated charcoal, rather than those with IBA and NAA. Rooted plantlets show high survival in soil mixed with perlite 1: vermiculite 1 or vermiculite alone.

• Korean Journal of Medicinal Crop Science
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• v.4 no.2
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• pp.132-138
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• 1996

This experiment was carried out to establish a year-round production system of pathogen-free stock through micropropagation in Fritillaria thunbergii as medicinal bulbous plant. The effect of different types of culture method and plant growth regulators, activated charcoal and mannitol on bulblet formation and subsequent growth were investigated. The MS solid medium containing 1. 0 mg/L kinetin and 0. 3 mg/L NAA was effective on bulblet formation and propagation rate compared to liquid and suspension culture. Addition of activated charcoal at 0. 01% to 0. 1% in the medium promoted bulbing of cultured bulblets and shoot formation. Addition of 1% to 2% mainnitol in MS medium was effective on the formation of bulblet and subsequent growth of bulblets compared to control. In addition of inhibitors, $10{\sim}100\;mg/L$ B-9 and Chloromequat had effective to stimulate bulblet growth but their effects were not so much as mannitol treatment. ABA treatment had detrimental effect on survival rate of explant and bulblet formation.

• Journal of Plant Biotechnology
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• v.31 no.3
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• pp.197-201
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• 2004

Shoot clusters were induced from bulb scales of Lilium longiflorum 'Geogia', and proliferated on medium containing 0.5 mg/L BA and 0.5 mg/L IAA. Thereafter, these shoot clusters were cultured in 5 L air-lift bioreactors to form and grow normal bulblets. Number of bulblets increased on medium with 30 g/L sucrose, but growth of bulblets was effective on medium with 60 g/L sucrose. The number of bulblets from shoot clusters had no differences, though bulblet growth was very effective on medium with between full and double strength of MS salts. The inoculation of 100 g shoot clusters as a cultural material was suitable for formation and growth of bulblets in 5 L bioreactors. Air-lift type was more effective for the formation and growth of bulblets than that in ebb and flood one, and 200∼300 mL$.$min$^{-1}$ injection of air was suitable in growth of bulblets.

• Journal of Plant Biotechnology
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• v.6 no.2
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• pp.103-106
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• 2004

Plantlet regeneration from the shoot apex was studied in three different genotypes of the chinese yam (Dioscorea opposita Thunb) cv. Jnagma and Danma, Dunggunma. The effects of plant growth regulators and inorganic salts concentration of the culture medium on bud induction and shoot growth were examined. The combinations of 0.2 mg/L BAP + 0.2mg/L kinetin, 0.01mg/L NAA + 0.2 mg/L kinetin and a single treatment of 0.2mg/L BAP were equally effective for bud and shoot formation from the shoot apices in the three cultivars. Auxin (2,4-D, NAA) treatment enhanced calli formation from the cultured apices. Also, the shoot apices of the cv. Dunggunma produced more callus and buds on the culture medium (MS) containing 0.05mg/L NAA and 0.5-1.0mg/L SAP. Lower salt strength of medium inhibited shoot elongation but did not have much effect on the shoot and bud induction from the shoot apices. These results will be useful to obtain disease-free plants of the Chinese yam.

• Journal of Forest and Environmental Science
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• v.29 no.4
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• pp.275-281
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• 2013

To establish in vitro nodal culture conditions of Echinosophora koreensis Nakai, one of rare and endangered species famous for beautiful flowers in the Korean Peninsula, the influence of plant growth regulators (PGRs) on shooting and rooting from in vitro shoots was investigated. In shoot multiplication, addition of 6-benzylaminopurine (BA) to the half-strength Driver and Kuniyuki's media in the range of 2.22 to 8.88 ${\mu}M $induced 2.5 to 2.7 shoots per axillary bud; and addition of 2.27 ${\mu}M $ thidiazuron (TDZ) produced 3.2 shoots, during 4 weeks of culture, while zeatin and isopentenyl adenine (2ip) were not effective on shoot multiplication as observed from several combination treatments of BA with other PGRs. Shoots established were smaller than 2 cm in length, in most of the treatments. while in BA 8.88 ${\mu}M $ treatment more than 30% of shoots were longer than 2 cm and shorter than 4 cm. In rooting, naphthalene acetic acid (NAA) from 5.37 to 21.48 ${\mu}M $ showed the rooting rate from 40.0 to 62.5%. Indole butyric acid (IBA) addition had little effect on rooting (<10%), although some roots in IBA-containing media were longer than those in NAA. Micropropagation from axillary buds of nodular explants was applicable and promising to multiplication and conservation of Echinosophora koreensis Nakai.

• Korean Journal of Medicinal Crop Science
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• v.19 no.1
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• pp.9-15
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• 2011

This study was conducted to establish the optimal condition for conservation of genetic resources and micropropagation of Lilium cernum. Induction of bulbet of L. cernum was highly effective (9.2 bulb/explant) on 1/2 SH (Schenk and Hildebrandt) medium supplemented with 1.0 mg/L TDZ (Thidiazuron) and 0.1 mg/L NAA (Naphthaleneacetic acid). The treatment of 0.1 mg/L NAA increased root development (6.4 root/explant) under the in vitro condition. In addition, treatments of AC (Activated Charcoal) and ventilation were enhanced to develop number of shoots and to elongate length of leaf, bulb and root. Futhermore, the process of short-term soil acclimatization was promoted to strengthen the plantlets induced under the in vitro condition.

• Journal of Plant Biotechnology
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• v.6 no.3
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• pp.199-204
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• 2004

The medicinal value of the genus Cleome justifies bio-technological studies of Cleome rosea, a Brazilian annual species from sandy coastal ecosystems (restinga), which have been submitted to an intense process of antropogenic degradation. In the present work, was analyzed the influence of cytokinins, 6-benzyladenine (BA) and 6-furfurylaminopurine (kinetin) added to the Murashige and Skoog medium (MS), on the proliferation capacity of explants from the stem axis (hypocotyl, node and internode) for a period of five monthly subcultures (150 days). Regardless of the explant sources, plantlet regeneration by direct and indirect organogenesis was observed. The largest number of shoots proliferated through direct organogenesis was obtained on medium with 4.4 $\mu{M}$ BA. Also, the highest proliferation capacity through indirect organogenesis was found on medium with 4.4 $\mu{M}$ BA + 4.6 $\mu{M}$ kinetin. The presence of kinetin alone was not effective for multiplication of the species. Elongation and rooting were obtained when shoots were transferred onto growth regulator-free medium, and acclimatization rates from 70% to 81% were achieved depending on explant sources used. Plants were then successfully established in soil and showed normal phenotypes.

• Korean Journal of Plant Tissue Culture
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• v.26 no.2
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• pp.133-136
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• 1999

Different kinds of cytokinins and auxins were tested for both shoot induction and rooting in a rare species, Abeliophyllum distichum Nakai. BA in WPM medium was the most effective in shoot induction, whereas zeatin seemed to be the most suitable for shoot elongation. Kinetin, at the concentration of 2.0~5.0 mg/L showed an effect in shoot induction, but the effect was inferior to BA and zeatin. Rapid shoot elongation could be achieved when the cultures were maintained on the diffuse light condition (below 500 lux) regardless of cytokinin treatments. For in vitro rooting, IBA was investigated as the best type of auxin tested when half strength GD medium was incorporated. The frequency of rooting using the plant growth regulator and medium just mentioned above was revealed as approximately 90%. In addition, the survival rate of rooted plantlets was almost 100% in an artificial soil mixture.