• 한국약용작물학회지
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• 제5권3호
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• pp.186-190
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• 1997

This study was carried out to investigate the effect of polyamines, salt strength. sucrose and gelling agents on the regeneration of plantlets by meristem culture of Aloe arborescens Mill. and Aloe vera L.. Shoot multiplication was more effective when 10mg/ l spermine in Aloe arborescens and 1mg/ l spermidine in Aloe vera added into MS medium than when other polyamines were treated into media. A quarter strength of MS medium was effective for rooting of shoots regenerated. Higher concentration of sucrose (45g/ l) was more effective for shoot regeneration. Addition of 4g/ l gelrite into the medium was effective for induction of multiple shoots from Aloe than that of agar or other concentrations of gelrite. When plantlets regenerated from meristem culture were transferred to pot. survival rate of plantlets was 80% on perlite and was 95% on vermiculite. respectively.

• 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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• 제36권1호
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• pp.81-86
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• 2009

An efficient and reproducible plant regeneration system was established using transverse thin cell layers (tTCLs) in five cultivars of Brassjca juncea L. The effects of medium conditions, explant types (tTCLs of hypcotyl and cotyledonary petiole) on shoot regeneration were examined in this study. The maximum shoot regeneration frequency was obtained in Murashige and Skoog (MS) medium supplemented with 4 mg/L 6-benzylaminopurine (BA) and 0.2 mg/L 1-naphthaleneacetic acid (NAA). The hypocotyls derived tTCL explants had more shoot regeneration frequency (52%) than the cotyledonary petiole derived tTCL explants. Shoot induction was further improved by the addition of silver nitrate ($AgNO_3$) in the regeneration medium. A significant genotypic effect was also observed between the five cultivars; Rai-5 displayed higher capacities to produce shoots than other cultivars. Regenerated shoots were rooted on MS basal medium without PGRs which induced 90% of roots. The plantlets established in greenhouse conditions with 99% survival, flowered normally and set seeds. The regenerated plants were fertile and identical to source plants.

• Journal of Forest and Environmental Science
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• 제25권2호
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• pp.111-118
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• 2009

Multiple shoot induction and plant regeneration using apical bud and nodal explants of 100 year old tree of Anthocephalus cadamba, an important sacred and medicinal tree in India was achieved for the first time. Aseptic explants cultured in Murashige and Skoog (MS) medium augmented with different concentrations of BAP (0.1, 0.5, 1.0, 2.5, 5.0 and 10 mg/l), when maintained for 60 days, healthy shoots were induced in presence of BAP (1 mg/l). Lower concentrations of BAP (0.1 - 0.5 mg/l) induced only one shoot per explant. Increase in number of shoots per explant was observed in presence of higher concentrations of BAP (2.5, 5.0 and 10 mg/l). However, elongation of shoots was completely inhibited. Bud break and shoot regeneration was largely associated with seasonal factors. Apical buds cultured during June to August exhibited early bud break within two weeks of initial culture. In rest of the months, bud break and shoot regeneration was very slow irrespective of the various concentrations of BAP used in the medium. Explants sourced from three different maturity levels of shoots indicated that actively growing shoots from the mother plant with 1 - 2 nodal segments was more suitable for culture initiation than the explants collected from mature shoots at dormant stage. Regenerated shoots with 2 - 3 pairs of leaves when transferred to half strength MS medium fortified with IBA (1 mg/l), 60% of the shoots induced healthy roots, indicating the possibility of large scale micropropagation.

• 식물조직배양학회지
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• 제21권4호
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• pp.247-252
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• 1994

조직배양을 통한 대량증식을 목적으로 구문초 (Pelalgonium citrosa)의 엽신, 엽병 및 정단분열조직을 auxin류와 cytokinin류의 생장조절제를 혼합첨가한 MS배지에 배양한 후 캘러스발생 및 shoot분화율을 조사하였고, 분화된 shoot는 NAA와 IAA가 단독첨가된 MS배지에 옮겨 뿌리분화율을 조사하였다. 생장조절제의 효과는 2,4-D와 kinetin의 혼용처리보다 NAA와 BA첨가배지에서 엽신, 엽병조직 모두 캘러스발생 및 multiple shoot분화가 양호하였다. 엽신조직의 경우 암배양 상태에서 캘러스와 shoot의 분화가 좋았고, 0.5 mg/L NAA와 BA 혼용배지에서는 정상적 민 shoot가 분화된 반면 NAA와 BA의 농도가 높을 경우 분화된 shoot는 vitrification현상이 비교적 많이 나타난다. Shoot는 캘러스를 통하거나 직접 절편체에서 분화되었는데 1개의 절편당 shoot분화수는 캘러스를 통해 분화된 경우가 훨씬 많았다. 엽보의 경우 캘러스발생 및 shoot분화양상은 엽신과 비슷하였으나 분화된 shoot수는 훨씬 적었다. 정단분열조직에서 캘러스증식율이 가장 좋았으며 shoot분화는 NAA와 BA 0.5mg/L첨가구에서 양호하여 대량증식에 가장 효과적인 반응이었다. Shoot로부터 뿌리발생은 1.0 mg/L NAA 첨가배지에서 가장 효과적이었다.

• Journal of Plant Biotechnology
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• 제29권1호
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• pp.25-29
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• 2002

미니토마토, Micro-Tom (Lycopersicon esculentum cv. Micro-Tom)의 줄기 절편 배양으로부터 신초 기관발생을 통한 식물체 재분화 시스템을 확립하였다. 다른 농도의 BAP가 처리된 MS 고체 배지에서 신초 발생을 유도하였다. 신초 발생을 유도하기 위하여 cytokinin 종류와 농도별 처리에서는 4mg/L BAP 처리가 Micro-Tom 신초 기관분화를 위한 최적농도로 나타났으며, 줄기절편 당 평균 5.3개의 신초를 형성했고 0.7 cm 길이 신장을 보였다. 4 mg/L BAP이 처리된 MS 고체배지에 질산은 (7 mg/L)과 putrescine (50 mg/L) 처리로 신초기관발생을 향상시킬 수 있었다. 신초가 약 1 cm 길이로 생장하였을 때 기부를 절단하여 0.1 mg/L IBA이 처리된 MS 고형배치에 배양하여 뿌리를 유도하였으며, 발근된 식물체를 vermiculite에 옮겨 순화시킨 결과 92%의 생존율을 보였다.

• Journal of Plant Biotechnology
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• 제6권1호
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• pp.39-43
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• 2004

A successful, efficient system for multiple shoot induction and plant regeneration of soybean (Glycine max) was established. Four soybean genotypes were compared for organogenic responses on various media cultured under light conditions. The adventitious shoots (98%, 2.6 shoots/cotyledon) directly from one-day-old cotyledon after germination induced by the hormone treatment and its efficiency was higher than any other conditions. The optimal medium for the induction of multiple shoots from cotyledon in Pungsannamulkong(shoot formation rate, 98%), Lx 16 (83%) and IIpumgeomjeongkong(63%) was MS medium supplemented with 2 mg/L BAP, but for Alchankong(75%), MS medium supplemented with 1mg/L zeatin and 1mg/L IAA, 3% sucrose, 4% Phytagel. Higher root induction (88%) was observed from the shoots placed on rooting medium (hormone-free MS basal). Plantlets were transferred onto the same medium supplemented with 1% activated charcoal for further development. With this treatment, regenerated plantlets were obtained within 7-8 weeks (shoot induction for 4 weeks, rooting and shoot elongation for 3-4 weeks).

• Journal of Plant Biotechnology
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• 제2권3호
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• pp.151-155
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• 2000

Shoot proliferation was obtained from shoot tips and nodal explants of Vitex negundo L. on MS medium supplemented with either BAP or KIN (0.1-2.0 mg/L) alone or in combination with NAA (0.1 mg/L). The concentrations of cytokinins combined with NAA produced multiple shoots from shoot tips and nodal explants. The highest mean percentage (84.3$\pm$8.0) of shoot multiplication's were observed on nodal explants in the presence of BAP (1.5 mg/L) and NAA (0.1 mg/L) followed by shoot tips (65.0$\pm$5.0). The regenerated shootlets were rooted on MS basal medium IAA, IBA, NAA (0.1-1.5 mg/L). The maximum number of roots (51.0$\pm$2.6) was achieved on the medium containing IBA (1.0 mg/L) followed by other auxins (NAA, IAA). The regenerated plants were successfully transferred to a mixture of vermiculate and soil. About 95% of the plantlets survived when transferred to the field.

• 한국자원식물학회지
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• 제7권1호
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• pp.17-22
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• 1994

This study was carried out to investigate the optimum medium and concentrations of growth regulators for induction of multiple shoot by meristem culture of floe otorefcenf Mill. MS medium supple-mented with 3${\mu}{\textrm}{m}$ TDZ was effective for induction of multiple shoot. Shoot multiplication was more ef-fective when 2mg/1 BA combined with 0.Img/1 IAA than when only BA were treated on medium. Halfstrength of MS medium supplemented with 2mg/L IAA was effective for rooting of shoots regenerated.When plantlets regenerated from meristem culture were transferred to pot, survival rate of plantletswas 80% on perlite and was 95% on vermiculite, respectively.

• 한국자원식물학회지
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• 제11권1호
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• pp.1-8
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• 1998

This study was conducted to establish mass propagation system from the axillary bud culture of chrysanthemum zawadskii H. which was used as material of medicinal plants. Shoot egeneration was better on MS medium with NAA and BA. The optimum concentraions of growth regulator for shoot regeneration differed depending on accessionsof C. Zawadskii. Shoot regeneration in Keungucheolcho was better on MS Medium with NAA 0.01mg/1 and BA 0.1mg/1 while Hyangrobonggucheocho was better with NAA 0.1mg/1and BA 0.3mg/1. Addition of NAA into medium was effective for induction of root from shoots regenerated. Shoot multiplcation was more effective when 10mg/1 spermine was added into medium than when other polyamines were treated ino medium . Randomly and specifically amplified polymorphic DAC banding patterns based on polymerase chain reaction (PCR) analysis were used to assess the genetic variation of plants regenerated from in vitro culture.