• Plant Resources
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• 제7권1호
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• pp.60-64
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• 2004

The establishment of an efficient protocol for plant regeneration and micropropagation from leaf explant cultures of Chicory, Cichorium intybus L. var. sativus. is reported. Callus formation rate appeared 100% from explant in all growth regulators, but calli formed in the prensence of naphthaleneacetic acid (NAA) were appeared very compact and non-embryogenic state. The regenerated shoots were obtained from leaf explant cultures on solid MS medium containing different concentrations of cytokinins and auxin. The highest number of shoots (5.7) per explant and shoot growth (2.8cm) was obtained on MS medium containing 0.1 mg BAP L$^{-1}$ and 0.1 mg NAA L$^{-1}$ . Indole acetic acid was the most suitable auxin for root formation among three auxins tested. 2,4-D had no effect on shoot and root formation.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2019년도 추계학술대회
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• pp.30-30
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• 2019

Pea (Pisum sativum) is one of important legume crops in the world. It is commonly used as a protein source for animal and human diet, and also used as a natural nitrogen source which is produced by a symbiotic bacterium in their root nodule and helpful for terrestrial ecosystem. The successful in vitro manipulation is depended on three main factors including physiology of plant donor, in vitro manipulation approach, and stress physiology during plant cultivation. Moreover, genotype is an important for plant manipulation; different genotype gives the different response to regeneration efficiency. An efficient condition of shoot induction for pea (Pisum sativum cv. 'Sparkle') was developed by using optimum explant, plant growth regulator concentrations, and pretreatment of BA onto explant. The average shoot number per explant showed the highest on two kinds of shoot induction media (MSB5 media containing 2 mg/L BA and a combination of 2 mg/L BA and 1 mg/L TDZ) with cotyledonary node explants culture. Moreover, the pretreatment of explant in 200 mg/L BA solution was found to be more effective in shoot induction than that of non-pretreatment. The analysis of genetic stability of regenerants by using 13 ISSR markers presented that in vitro regenerated plants showed polymorphism with 8.3% compared with their mother plants.

• 한국약용작물학회지
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• 제15권1호
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• pp.62-66
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• 2007

한국의 전통적인 민간 약재로 사용되어져온 흰민들레의 잎절편체로 부터 기관형성을 통한 재분화를 시도하였다. 잎 절편체를 BA (0-4mg/L)와 2,4-D (0-1mg/L)가 혼합 첨가된 MS 기본 배지에 치상하여 배양한 결과, 배양 3주후부터 신초가 발생되었다. 신초 분화율은 2mg/L BA 첨가된 조건에서 가장 높았으며, 배양 4주째 4mg/L BA 첨가된 조건에서는 캘러스가 유기되었다. 잎령에 따른 부정아 형성율, 발생빈도, 건량, 생중량을 조사한 결과, 발아 후 7주된 잎 절편체에서 평균 11.5개의 신초를 형성하였다. 유도된 신초는 0.5mg/L NAA가 첨가된 배지에서 발근되었으며, 화분에 옮겨 완전한 식물체로 재분화 되었다.

• Journal of Plant Biotechnology
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• 제3권1호
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• pp.19-25
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• 2001

Induction of somatic embryogenesis from Brazilian eggplant variety F-100 was studied in response to four auxin types. NAA, at the optimal concentration of 54 $\mu\textrm{m}$, was the only one that resulted in the induction of somatic embryos in either leaf and cotyledon explant and, at murk lower intensity and frequency, in hypocotyl and epicotyl explants. The optimal temperatures for embryo induction were 28 and 35$^{\circ}C$ for cotyledon and leaf explants. Incubation at 22$^{\circ}C$ caused a significant reduction both in the frequency and intensity of induction. This system was used to study the effects of position and orientation of the tissue on the culture medium as well as of antibiotics and explant co-cultivation with Agrobacterium on the efficiency of somatic embryo induction. The intensity of embryo induction was greater in the midsections of cotyledons relative to apical and basal regions, when the abaxial surface was in contact with the culture medium. The presence of antibiotics resulted in approximately 40-60% reduction of embryo induction relative to control explants, which originated 335$\pm$26.6 embryos. Co-cultivation with Agrobacterium before treatment with antibiotics caused a more drastic reduction (80-99%). Ampicilin treatment after cocultivalion with Agrobacterium caused the least inhibitory effect, allowing the production of 60 embryos/explant.

• 식물조직배양학회지
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• 제26권1호
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• pp.59-63
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• 1999

국화 '남전'의 기내배양된 엽절편으로부터 신초 기관형성을 통한 효율적인 식물체 재생 체계를 확립하였다. 엽절편으로부터의 부정지 형성은 생장조절제 조성, 잎의 연령, 광조건, 배양용기당 절편체 수 및 치상방향에 의해 많은 영향을 받는 것으로 나타났다. 효율적인 부정지 형성을 위해서는 MS배지에 생장조절제 BA 0.5 ㎎/L 와 NAA 2.0 ㎎/L를 첨가하는 것이 가장 좋았으며, 엽절편체는 완전히 전개된 신초 상부의 1∼2번째 잎을 채취하여 4면을 절단한 다음 잎의 향축면이 배지에 닿도록 하여 Petri-dish당 8개의 엽절편을 치상하여 배양초기 1주간 암조건에서 배양하다가 명조건으로 옮겨주는 것이 가장 효과적이었다. 이와 같은 조건에서 엽절편체로부터 신초 재생률 100%, 절편체당 신초수 13.7개의 양호한 재생 이 이루어졌다. 재생된 신초는 NAA 0.1 ㎎/L를 첨가한 MS배지에서 성공적으로 발근이 이루어져 소식물체가 얻어졌다. 엽절편체로부터 얻어진 소식물체를 인공토양 (Vermiculite: Perlite=1:1)에서 활착시켜 온실에서 재배하였는데, 외견상 정상적으로 개화하였다.

• Journal of Plant Biotechnology
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• 제30권3호
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• pp.251-255
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• 2003

An efficient system for in vitro bulblet formation of Lilium oriental hybrids(cvs). Casa Blanca and Siberia is described. Transverse thin cell layer(tTCL)(1mm thick) explants of 'Casa Blanca' formed bulblets at a frequency of 97.7％ when cultured on Murashige and Skoog (MS) medium supplemented with 1mg/L 2,4 dichlorophenoxyacetic acid(2,4-D) (On average 15.6 bulblets were formed per explant). The frequency of bulblet formation was drastically reduced when the explant ghickness was thinner than 1 mm. Explants from the outermost layer of bulb scale produced greater frequency of bulblet formation than middle or innermost layer. Among auxins supplemented to culture medium at 1 mg/L, 2,4-D led to greater frequency of bulblet formation on explants than dicamba, picamba, or phenylacetic acid(PAA). tTCL explants from the middle region of the outermost layer bulb scale yielded greater frequency of bulblet formation than the upper or lower region. tTCL stem explants of 'Siberia' formed bulblets at a frequency of 95.3% when cultured on MS medium with 1 mg/L 2,4-D(On average 9.1 bulblets were formed per explant). The system estabilished in this study will be useful for in vitro rapid propagation and genetic transformation of Lilium Oriental hybrids.

• Journal of Plant Biotechnology
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• 제3권2호
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• pp.95-100
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• 2001

To select the section with shoot formation ability, the calli and shoot formation from three sections (first leaf including cotyledonary node, hypocotyl and cotyledon explants) of 5-days-seedlings of soybean were induced on MS medium supplemented with 1.0 mg/L BAP, 3% sucrose, and 0.3% gelrite for one month. The first leaf section exhibited the highest shoot formation rate (51%), followed the hypocotyl section (10%) and the cotyledon section (0%). The shoot formation rates and shoot number of the four excised sections (whole first leaf, a half of the first leaf, a third of the first leaf and only node) of the first leaf were also investigated on the same medium. A half of the first leaf explant and the third of the first leaf explant had higher shoot formation rates (76-80%) and numbers (3-4 / explants) than those in other two explants. Effects of six cytokinins (kinetin, zeatin, BAP, 2iP, PBA, and TDZ) on shoot formation were determined, using the half of the first leaf explants. Zeatin (1.0 mg/L) exhibited the highest in shoot formation rate (94%) and numbers (8 / explant). In addition, the combined effects of three cytokinins (zeatin, BAP, and TDZ; 0.5, 1.0, 2.0 mg/L, respectively) and an auxin (IAA; 0.0, 0.5, 1.0, 2.0 mg/L) were determined. The combination (1:1, v/v) of zeatin (1.0 mg/L) and IAA (1.0 mg/L) exhibited the highest in shoot formation rate (96%) and numbers (16 / explant), twice more than zeatin (1.0 mg/L) alone. The shoot cuttings were transferred and cultivated on the rooting media supplemented with only auxin, IBA at various concentrations. The highest root formation (8 / shoot) was achieved on the medium supplemented with 1.5 mg/L. After 4 weeks of cultivation, the plantlets with an extensive root system were transplanted in pots with a soil mixture of vermiculite and fine sand. Transferred to field, about 75% of the plantlets survived.

• 식물조직배양학회지
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• 제25권5호
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• pp.347-351
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• 1998

딸기 '수홍'의 기내배양된 잎과 탁엽 절편체로부터 기관형성을 통한 식물체 재생 방법을 확립하고자 실험을 수행하였다. 엽절편체 배양에서는 생장조절제 처리에 따라 NAA 첨가시에는 뿌리 재생, BA 첨가시에는 신초 재생이 이루어졌으며, BA 1.0㎎/L + NAA 0.2 ㎎/L 처리구에서 재생률 31.1%, 절편체당 신초수 1.7개로 가장 양호하였다. 탁엽절편체 배양에서는 생장조절제와 광조건의 처리를 실시하였는데, 명조건에서는 생장조절제 처리에 따른 뚜렷한 경향을 발견할 수 없었으나, 암조건에서는 고농도 BA와 저농도 NAA의 혼용처리가 신초 재생에 필요함을 알 수 있었다. 탁엽절편체는 BA 2.0 ㎎/L + NAA 0.1㎎/L 처리구에서 재생률 44.4%, 절편체당 신초수 4.0개로 가장 양호한 반응을 나타내었다. 재생된 신초는 NAA 0.1㎎/L 가 첨가된 MS배지에서 발근되었으며, 이어서 인공토양(vermiculite : perlite = 1 : 1)에서 성공적으로 활착을 유도할 수 있었다.

• 한국작물학회지
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• 제29권4호
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• pp.401-408
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• 1984

우리나라에서 고구마 장려품종인 홍미와 신미를 액아배양시 explant의 크기 NAA, BA 및 kinetin의 농도가 기관분화와 생육에 미치는 영향을 구명하고저 본 실험을 실시하였으며 실험결과를 요약하면 다음과 같다. 1. 5mm되는 explant 배양이 2mm explant 배양보다 기관분화 및 생육이 좋았으며 홍미는 MS 배양에 NAA 0.1mg/$\ell$와 kinetin 1mg/$\ell$을 조합처리할 때 신미는 MS배지에 NAA 0.1mg/$\ell$와 kinetin 1mg/$\ell$을 조합처리할 때와 kinetin 1mg/$\ell$, BA 0.1mg/$\ell$을 단독처리할 때 shoot의 분화가 좋았다. 2. 뿌리분화는 홍미와 신미가 비슷한 결과를 보였으며 NAA 0.lmg/$\ell$와 kinetin 1mg/$\ell$을 조합처이한 배지에서 뿌리수와 뿌리길이가 증가하였다. 3. BA의 농도가 증가함에 따라 비정상 식물체의 출현이 많았으며 한 개의 explant에서 여러개의 shoot의 길이가 짧았다. 4. 이차계대배양에서 shoot의 분화 및 생장은 NAA 0.1mg/$\ell$와 kinetin 1mg/$\ell$가 첨가된 배지에서 좋은 결과를 보였고 뿌리의 분화는 0.1 mg/$\ell$ BA에 첨가된 배지에서 가장 효과적이었다.

• Journal of Plant Biotechnology
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• 제5권1호
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• pp.59-61
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• 2003

Petiole explants from 20 cultivars of Catharanthus roseus were cultured on various shoot-inducing media to assess their competence for adventitious shoot formation. After eight weeks of culture on Murashige and Skoog' s medium supplemented with 4.4 $\mu\textrm{m}$6-benzyladenine and 0.5 $\mu\textrm{m}$ $\alpha$-naphthaleneacetic acid, petiole explants from 'Cooler Icy Pink' exhibited the greatest frequency of adventitious shoot formation at 40%, which was followed by 'Little Bright Eye'. By comparing with a previous study on assessment of competence for adventitious shoot formation in hypocotyl explant cultures of various cultures, it is indicated that the relative degree of their competence among cultivars varies to the organ used for the source of explant. Excised adventitious shoots were readily rooted on half-strength MS basal medium. Regenerated plantlets were successfully transplanted to potting soil and grown to maturity in a greenhouse.