• 한국잠사곤충학회지
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• 제50권2호
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• pp.166-170
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• 2012

최근 수요가 늘어나고 있는 꾸지뽕나무 묘목의 번식을 위하여, 비교적 용이하고 대량생산이 가능한 묵은 가지 및 새순 삽목법에 의한 안정적인 뽕나무묘목 생산체계를 확립하기 위하여 본 실험을 실시하였다. 꾸지뽕나무의 묵은 가지 삽목 최적조건을 구명하기위하여 삽수의 길이, 굵기, 발근처리제 농도를 달리하여 처리한 결과, 삽수의 길이는 15 cm, 굵기는 중간정도, 발근처리제는 NAA, IBA 다 같이 5,000 ppm에서 가장 발근률이 높고 발근 후의 생장이 좋았다. 또한, 새순 삽목법을 개발하기 위하여, 삽목상의 형태, 차광망의 차광정도, 새순당 잎의 수를 달리하여 삽목 후 발근 및 발근후의 생장을 조사한 결과, 삽목상의 형태는 2중 터널을 설치하고 1.5 m 위에 차광망을 설치하는 B 타입의 경우가 좋았고, 단일 터널 위에 차광망을 설치하는 A 타입의 경우는 발근률이 매우 낮았다. 차광망의 차광정도는 55% 차광구에서 발근이 가장 좋고, 55% 이상이거나 무차광구에서는 발근률이 낮았다.

• Journal of Plant Biotechnology
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• 제45권4호
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• pp.382-391
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• 2018

본 연구는 사과 대목 M.26 (Malus pumila Mill))의 효과적인 기내 대량번식하기 위해 신초 증식과 뿌리 형성에 적합한 배지조건을 확립하고, simple sequence repeat (SSR) 마커를 이용하여 증식된 소식물체의 유전적 다양성을 분석하고자 수행하였다. MS (Murashige and Skoog) 기본배지에 benzyladenin (BA, $0.5{\sim}5.0mg{\cdot}L^{-1}$)와 thidiazuron (TDZ, $0.01{\sim}0.1mg{\cdot}L^{-1}$)을 첨가하여 신초를 배양한 결과, $1.0mg{\cdot}L^{-1}$ BA 처리에서 절편체 당신초 수가 10.67개로 가장 많았으며 과수화 발생률은 BA 처리구보다 TDZ 처리구에서 높았다. M.26 신초 증식에 BA와 auxin과의 혼용처리 효과는 없었고, $1.0mg{\cdot}L^{-1}$ BA가 첨가된 MS 기본배지가 적합하였다. 신초 발근에 적합한 배지를 구명하고자 auxin인 indole-3-butyric acid (IBA)와 ${\alpha}$-naphthaleneacetic acid의 농도($0.5{\sim}5.0mg{\cdot}L^{-1}$), MS 배지의 무기염류(1/4 ~ 1배) 및 sucrose 농도($0{\sim}30g{\cdot}L^{-1}$)를 달리하여 처리한 결과, $1.0mg{\cdot}L^{-1}$ IBA, $15{\sim}20g{\cdot}L^{-1}$ sucrose가 첨가된 1/2 MS 배지에서 발근율(100%), 뿌리 수(10.45 ~ 13.60개/절편체), 뿌리 길이(7.41 ~ 8.33 cm) 및 신초 길이(4.93 ~ 5.38 cm)가 양호하였다. 15종의 SSR primer를 이용하여 증식된 20개의 소식물체를 분석한 결과, 총 30개의 대립유전자가 검출되었으며 모두 동일한 밴드 패턴을 보여 온실에서 자란 M.26 식물체와 유사하여 유전적으로 안정한 것으로 판단되었다.

• 한국자원식물학회지
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• 제24권2호
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• pp.168-173
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• 2011

본 연구는 수수의 성숙 종자로부터 캘러스유기 및 재분화 효율 조사하기위하여 수행되었다. 배발생 캘러스 형성을 살펴보기 위해 생장조절제 효과를 조사하였다. 수수 성숙종자로부터 캘러스 유기에 적합한 생장조절제 종류와 농도는 2 mg/L 2,4-D인 것으로 나타났다. 배발생 캘러스의 고효율 빈도는 B5 배지에 2 mg/L 2,4-D을 첨가하였을 때 가장 양호한 것으로 나타났다. 배발생 캘러스로부터 식물체 재분화는 BAP와 IBA를 넣은 MS 배지가 가장 적절한 것으로 나타났다. BAP 농도가 높을수록 신초재분화가 활발하였다. 따라서, 본 연구 결과로부터 수수 기내배양시 신초와 발근 형성에 효과적인 생장조절제 조합은 0.5 $mg\;l^{-1}$ BAP와 0.25 $mg\;l^{-1}$ IBA인 것으로 나타났다.

• 식물조직배양학회지
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• 제24권3호
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• pp.129-135
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• 1997

한국 야생차나무의 잎절편과 배배양에서 생장조절물질의 첨가에 따른 형태형성 과정의 변이를 조사하였다. 그 결과 접합자배는 싸이토키닌을 5-20$\mu\textrm{M}$을 첨가한 MS 배지에서 직접적인 체세포 배와 부정아 및 액아 발생률이 높았으며 옥신의 함량이 높아질수록 형태형성율이 급격히 저하되었다. 1/2 MS 및 1/4 SH배지에 $10\mu\textrm{M}$ IBA가 첨가된 배지에서 모든 줄기가 발근 되었다. MS배지에 2,4-D를 첨가한 배지에서 미성숙 접합자 배를 배양한 결과 체세포배성 캘러스가 유발되었다. 성숙된 접합자 배를 발아시킨 후 어린잎을 채취하여 고농도의 옥신 (IBA와 NAA) 또는 싸이토키닌 (BAP)이 함유된 MS배지에 배양한 결과 체세포배 형성 캘러스가 발생되었으며 또한 직접적인 체세포배가 발생하였다. 그러나 뿌리와 줄기 형성에는 각각 요구하는 옥신의 농도와 종류가 각각 달랐다.

• Journal of Forest and Environmental Science
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• 제34권5호
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• pp.388-394
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• 2018

An efficient and reproducible protocol for in vitro germination of seeds of Couroupita guianensis has been developed in the present study. Couroupita guianensis is a medicinally important tree and categorized as threatened plant species by the IUCN. The seeds were surface sterilized using 0.1% $HgCl_2$ and inoculated on MS (Murashige and Skoog) and Woody Plants (Llyod and McCown) medium. The seeds with partially removed seed coat responded better (100%) on half strength MS medium as compared to the full (51%), one-fourth strength MS (79%) and the WP medium. Half strength MS medium conjunct with $2.0mg{\cdot}L^{-1}$ indole-3 butyric acid (IBA) was found best among the different types of auxins and cytokinins tested for seed germination, as all the seeds germinated on this medium combination. The seedlings were successfully hardened in the greenhouse and restored in the field with 83% survival rate. The protocol can be used as conservation measure for large scale multiplication of this threatened forest tree species.

• 한국조경학회지
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• 제27권4호
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• pp.50-58
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• 1999

This study was carried out to investigate the growth characteristics and propagation methods of L. obtusiloba as a woody landscape plant. The results are obtained as follows: L. obtusiloba was dioecious shrub and shaped with bush type. Leaves were ovate, obtuse, cordate, 7.05 cm long, 7.20 cm wide, and petiole 2.0 cm long. Flowers of L. obtusiloba were diclinous. Soil acidity ranged from pH 4.06 to 5.53 with the lowest at the Mt. Soo-Ri. Mt. Soo-Ri located near factory district, which was considered to damaged by environmental deteoration. While soil organic matter was highest at Mt. Soo-Ri, inorganic nutrients were low. L. obtusiloba grows in the area with low soil acidity and low content of inorganic. Therefore it seemed to be tolerant to air pollution. L. Obtusiloba was high seed germination rate in the plug box and its shoots were longer than seeding box and softwood cutting of L. obtusiloba showed the rooting rate of 50% at 5,000ppm on June 23. To develop a mass propagation method of Korean native L. obtusiloba through an axillary bud culture as a woody landscape plant, about 2∼3 cm shoots induced from explant were subcultured to new media contained different growth regulators. Shoots multiplied most effectively on a WPM containing 1.0 mg/l BA, producing 5.5 shoots with a shoot length of 2.5 cm per shoot explant.

• Journal of Plant Biotechnology
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• 제48권2호
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• pp.93-99
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• 2021

This study was conducted to develop an Agrobacterium-mediated genetic transformation protocol for the carnation cv. "Jinju" to counteract its ethylene sensitivity. The new protocol involves the use of an improved shoot regeneration medium, optimized minimal concentrations of the selective agent, a pre-culture period, and co-cultivation periods. Silver nanoparticles (NAg) added at a concentration of 2.0 μM to the Murashige and Skoog (MS) basal shoot regeneration medium supplemented with 0.1 mg/L indole-3-butyric-acid (IBA) and 0.2 mg/L thidiazuron (TDZ) improved the shoot regeneration efficiency, number of shoots per explant, and plant growth compared to the control without the addition of NAg. The phosphinothricin (PPT) concentration of 1.0 mg/L was determined to be the minimal and optimal concentration for the selection of putative transgenic plants. When the explants were infected with Agrobacterium cells harboring the acdS gene, the explants that were pre-cultured for three days induced more putative transgenic plants than those that were co-cultivated for four days. Therefore, we expect that the results of this study will benefit researchers who are developing genetic transformations of carnations.

• Journal of Plant Biotechnology
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• 제42권1호
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• pp.34-42
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• 2015

본 연구는 약용식물인 적하수오의 부정근과 생리활성물질 대량생산을 위해 생물반응기 배양 조건을 확립하고자 실시되었다. 이를 위하여 생물반응기 배양 시 배지 내 무기물 함량과, auxin의 종류와 농도, sucrose 농도가 적하수오 부정근의 생장과 총 phenolics와 flavonoids 함량에 미치는 영향을 조사하였으며, 배양 중 methyl jasmonate (MeJA)와 salicylic acid (SA)의 첨가가 생리활성물질 축적에 미치는 영향을 조사하였다. 그 결과 $9.84{\mu}M$ IBA와 50 g/L sucrose가 첨가된 1배 MS배지에서 최적의 부정근 생장이 이루어졌으며 생리활성물질 축적도 가장 높았다. MeJA와 SA 처리시 적하수오 부정근의 생장과 생리활성물질 축적은 오히려 감소하였다. 본 연구 결과는 산업적 목적을 위한 적하수오의 부정근과 생리활성물질 대량생산시 기초자료로 활용될 수 있을 것으로 기대된다.

• Journal of Plant Biotechnology
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• 제47권1호
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• pp.40-45
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• 2020

An efficient protocol for multiple shoot induction and plant regeneration from axillary bud culture of Magnolia 'Vulcan' was developed in the present study. Primary shoots were obtained from axillary bud explants cultured on Murashige and Skoog (MS) medium containing 1.0 mg/L 6-benzylaminopurine (BA). To induce multiple shoots effectively, primary shoot tips were cultured on MS medium supplemented with different concentrations of BA and zeatin at 0, 0.2, 0.5, and 1.0 mg/L. Of these treatments, the MS medium with 0.5 mg/L BA resulted in the highest number of shoots per explant with an average value of 5.9, and it produced the greatest shoot height at 4.8 cm after 12 weeks of culturing. In the rooting of in vitro produced shoots, the greatest percentage of explants forming roots (91.3%), number of roots per explant (9.7), and root length (2.8 cm) were obtained in half-strength MS medium supplemented with 6.0 mg/L indole-3-butyric acid (IBA). Regenerated plantlets were successfully acclimatized and hardened off inside the culture room with 87.5% survival rate. Plants were transferred to a greenhouse with a 97.2% survival rate. The highly efficient shoot multiplication and plant regeneration system reported herein can be used for large-scale clonal propagation of valuable Magnolia species or cultivars.

• Plant Biotechnology Reports
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• 제2권4호
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• pp.245-252
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• 2008

The genetic status of somatic embryo-derived plantlets of Cymbopogon flexuosus was examined by randomly amplified polymorphic DNA (RAPD) analysis. Auxins such as 2, 4-dichlorophenoxyacetic acid (2, 4-D) (1-4 mg/l) were used in Murashige and Skoog (MS) medium for induction of calli from rhizomatous explants of Cymbopogon flexuosus. Optimum calli were induced on MS medium supplemented with 2, 4-dichlorophenoxyacetic acid (2, 4-D) (3.5 mg/l) alone or in combination with $N^6-benzyladenine$ (2 mg/l). Somatic embryogenesis was achieved from long term calli when cultured on MS medium containing 2, 4-dichlorophenoxyacetic acid (2, 4-D) (2 mg/l) along with $N^6-benzyladenine$ (BA) (1-2 mg/l). Regeneration was achieved when freshly induced embryogenic calli were sub-cultured on MS medium supplemented with $N^6-benzyladenine$ (3 mg/l) alone. Long-term cultured embryos showed profuse minute rooting on regeneration medium supplemented with N6 -benzyladenine (3 mg/l). Microshoots were rooted in the presence of indole-butyric acid (IBA) (2 mg/l). DNA samples from the mother plant and 18 randomly selected regenerated plants from a single callus were subjected to RAPD analysis with 6 arbitrary decamer primers for the selection of putative somaclones. A total of 64 band positions were scored, out of which 19 RAPD bands were polymorphic. From genetic similarity coefficient based on RAPD band data sharing, it was found that the majority of the clones were almost identical or more than 92% similar to the mother plant, except CL2 and CL9 (66%) which showed highest degree of genetic change with CL2 and CL9 showing presence of two non-parental bands each.