• Journal of Plant Biotechnology
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• 제6권3호
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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.

• 식물조직배양학회지
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• 제24권2호
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• pp.119-124
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• 1997

십자화과 향신료 작물인 서양고추냉이 (Armoracia rusticana (Lam.) Gaerth., May. et Scherbs)의 재분화에 미치는 제 요인을 조사하였다. 서양고추냉이의 callus로부터 식물체 재분화는 IAA 0.5 mg/L, BA 5.0 mg/L, spermine 10 mg/L이 첨가된 MS배지에서 가장 높았다. BA 2.0 mg/L과 NAA 2.0 mg/L가 첨가된 MS배지에 엽, 엽병, 뿌리의 조직을 치상한 결과 각각의 조직으로부터 체세포배가 발생하였으며, 기관발생 경로를 거쳐서 식물체가 재분화 되었으며, 빈도는 낮았지만 생장조절물질이 포함되지 않은 MS배지에서도 각 조직으로부터 식물체가 분화되었다. 수소이온 농도는 pH 4.0부터 8.0의 비교적 넓은 범위에서 multiple shoot가 형성되었으며, polyamine류의 첨가는 shoot와 뿌리의 형성을 촉진시켰다. Callus로부터 뿌리 또는 잎이 분화 중인 조직에서 특이적인 단백질이 생성되는 것이 확인되었다. 이상의 결과, 서양고추냉이는 생장점 배양, 체세포배발생, 기관발생과정을 각기 거쳐 식물체가 재생될 수 있는 식물체로 확인되었다. 서양고추냉이의 이러한 특성은 세포, 조직, 기관의 형태형성 연구 및 형질전환 연구에도 좋은 재료로 이용되리라 생각된다.

• 식물조직배양학회지
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• 제26권3호
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• pp.219-222
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• 1999

부정아를 유도하기 위하여 발아 7∼10일된 일본 결구상추 2품종과 국내 잎상추 (Lactuca sativa L.)4품종의 하배축 및 자엽절편으로부터 식물체 재분화시스템을 확립하였다. 하배축 및 자엽절편을 BA와 NAA가 조합 처리된 MS 및 SH배지에 치상하여 5주 동안 명배양하였다. 일반적으로 하배축보다는 자엽절편에서, SH 배지보다는 MS 배지에서 배양하였을 때에 부정아 형성률이 높았다. MS배지에 BA는 0.5 ㎎/L, NAA는 0.1∼l ㎎/L로 처리하였을 때에 최고의 부정아 형성률을 보였으며, 품종에 따라 30% ( '만추대청치마')에서 86% 까지의 부정아 형성률을 나타내었다. 형성된 shoot의 95% 이상이 MS 기본배지에서 발근하여 소식물체로 발달하였다.

• 아시안잔디학회지
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• 제8권3호
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• pp.137-147
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• 1994

We have established a high-frequency plant regeneration system via organogenesis from mature seed of Korean lawngrass(Zoysia japonica Steud.). The effects of 2,4-dichiorophenoxy acetic acid (2,4-D), 6-furfuryl amino purine (kinetin), $\alpha$-naphthaiene acetic acid (NAA), N6-benzyl amino pu-rine (BAP), and casein hydrolysate (CR) on cailus induction and multiple shoot formation on ex-posure to light were evaluated. Callus produced on the Murashige and Skoog (MS) medium containing 2,4-D and kinetin had high organogenesis potency. A single addition of 1.0 mg $L-^1$ 2,4-D significantly induced callus. Also, 1.0 mg L-$^1$ 2,4-D, with the addition of 0.1 mg $L-^1$ kinetin highly enlianced callus induction. The trend of cailus induction was also found on mediurn containing 0.1 mg $L-^1$ BAP with 1.0 mg $L-^1$2,4-D, and 1 g $L-^1$ CR with the addition of 1.0 mg $L-^1$ 2,4-D. However, NAA was no effective on callus formation. The growth of root was significantly high in the presence of 0.1 mg $L-^1$ kinetin compared to other concentrations. Over 2 mg $L-^1$ kinetin highly lengthened roots. Fresh weight of plantlet was highest on medium containing 0.1 mg $L-^1$ 2,4-D. Also, on medium containing 0.1 mg $L-^1$ BAP, fresh weight of piantlet was highly enhanced. BAP was significantly effective on multiple shoot formation, particularly when 2.0 mg $L-^1$ was added with 0.1 mg $L-^1$ 2,4-D. Callus induction and multiple shoot formation were achieved on MS basal medium containing 1.0 g $L-^1$ CH.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2003년도 식물바이오벤처 페스티발
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• pp.139-139
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• 2003

• 한국약용작물학회지
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• 제14권6호
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• pp.367-370
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• 2006

The study was carried out to establish an improved protocol for shoot organogenesis and plant regeneration from leaf explant cultures of Scrophularia buergeriana M. with the treatment of ethylene inhibitors [silver nitrate (AgNO$_3$), aminoethox-yvinylglycine (AVG), Cobalt chloride (CoCl$_2$)]. The regenerated shoots obtained from leaf explant cultures on MS medium containing 2 mg/l BAP, The additions of AgNO$_3$. AVG and CoC1$_2$ substantially improved the shoot regeneration frequency, at the optimal concentration of 7 mg/L, 7 mg/L, and 3 mg/L respectively, The regenerated shoots could be easily rooted with 0.1 mg/L IBA treatment. The noted plants were hardened and transferred to vermiculite with a 85% survival rate where they grew normally.

• Journal of Plant Biotechnology
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• 제44권3호
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• pp.335-342
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• 2017

Purple passion fruit (Passiflora edulis Sims) is one of the introduced tropical plants, an increasing interest has arisen due to its distinctive taste and attractive flavor. It is expected that passion fruit production and planted area will increase gradually in the years ahead because of high profitability and consumer's demands of healthful ingredients. So we tried to investigate the effect of plant growth regulators and antioxidants on in vitro plant regeneration and callus induction from leaf explants of passion fruit for an establishment of optimal mass propagation system. Young leaf explants of purple passion fruit were cultured in Murashige and Skoog (MS) medium containing different growth regulators and antioxidant additives to induce the shoot organogenesis. After 8 weeks, the highest embryogenic callus formation rate was obtained in MS medium supplemented with $1mg{\cdot}L^{-1}$ 6-benzylaminopurine (BAP) and $2mg{\cdot}L^{-1}$ 2,4-dichlorophenoxyacetic acid (2,4-D), furthermore, the shoot development via organogenesis was also observed. Silver nitrate ($AgNO_3$), which was added into the medium to minimize the adverse effects of leached phenolics, was effective for reduction of medium browning and sudden explant death. In the medium supplemented with $1mg{\cdot}L^{-1}$ BAP and $1mg{\cdot}L^{-1}$ gibberellic acid ($GA_3$), shoots were most vigorously regenerated and elongated. Most shoots rooted successfully in half strength medium with $1mg{\cdot}L^{-1}$ indol-3 acetic acid (IAA), and more than 90% of plantlets survived after 4-month acclimatization period.

• Plant Biotechnology Reports
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• 제5권2호
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• pp.177-186
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• 2011

This study describes for the first time in Pinus genus a plant regeneration system via a combined pathway of somatic embryogenesis and organogenesis from immature seeds of radiata pine. Somatic embryos were obtained from embryogenic line 2162 of Pinus radiata D. Don on EDM basal medium containing $60{\mu}M$ ABA and 6% sucrose. The explants used for organogenesis experiments were either freshly collected somatic embryos or somatic embryos germinated for 1 week. Germination medium was half-strength LP medium, supplemented with 0.2% activated charcoal. Different induction periods and BA concentrations were assayed for shoot induction. After induction treatments, explants were elongated on the same medium used for germination stage. Rooting medium was quarter-strength LP medium supplemented with three different auxin treatments: $1.5mg\;L^{-1}$ 1-naphthalene acetic acid (NAA), $1.5mg\;L^{-1}$ indole-3-butyric acid (IBA) and $1mg\;L^{-1}$ IBA with $0.5mg\;L^{-1}$ NAA (MIX). The effect of the photon flux ($120mmol\;m^{-2}\;s^{-1}$ and darkness) in the first week of the explants in the rooting media was also tested. This methodology could offer an alternative to overcome some problems associated with somatic embryogenesis such as the seasonality of embryogenic tissue (ET) initiation or a low embryo production from the ET, a particularly important issue in the case of genetically transformed ETs.

• 식물조직배양학회지
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• 제26권4호
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• pp.223-227
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• 1999

본 연구는 글라디올러스 캘러스로부터의 재분화 조건을 구명함으로써 캘러스 배양시스템을 확립하는데 기여하고자 하였다. 글라디올러스 캘러스로부터의 유식물체 획득은 캘러스를 2,4-D 무첨가 1/2 MS고체배지에 치상한 후 24시간 일장하에서 15$^{\circ}C$로 배양하였을 때 효과적이었다. 캘러스로부터의 기관형성에 미치는 배양방법의 영향을 검토한 결과, 부정근의 형성은 액체진탕배양이 그리고 부정아의 형성은 액채정치배양이 각각 우수한 것으로 확인되었다. 본 실험의 결과를 통해 글라디올러스 ‘Topaz' 캘러스로부터의 재분화를 위한 최적 배양 조건을 선발하는 한편, 액체진탕배양법에 의해 기관-캘러스 혼합체를 유도할 수 있었으며, 이를 이용하여 기내 유식물체를 대량생산할 수 있는 가능성을 확인할 수 있었다.

• Plant Biotechnology Reports
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• 제3권4호
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• pp.341-345
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• 2009

This study describes culture conditions for a plant regeneration system via a combined pathway of somatic embryogenesis and organogenesis in root explant cultures of the commercial rose cultivar 'Charming'. Root explants formed white calluses at a frequency of 30% after 6 weeks of culture on Schenk and Hildebrandt (SH) medium supplemented with $11mg\;1^{-1}$ 2,4-dichlorophenoxyacetic acid. After 6 weeks of transfer to SH medium without growth regulators, initial white calluses gave rise to globular somatic embryos at a frequency of 2.8%, which were subsequently dedifferentiated to embryonic tissues. Somatic embryos or embryonic tissues initially derived from root explants did not undergo development beyond cotyledonary stage. To produce adventitious shoots, embryonic tissues were sliced and cultured on SH medium with $0.5mg\;1^{-1}$ 6-benzyladenine. After 4 weeks of culture, 28% of embryonic tissue explants formed adventitious shoots. Regenerated shoots were rooted on half strength SH medium with $0.1mg\;1^{-1}$ ${\alpha}-naphthalaneacetic$ acid and subsequently grown to maturity. Root-derived embryonic tissues were proliferated by subculture, while retaining the capacity for shoot production for a few years.