• 제목/요약/키워드: Shoots proliferation

검색결과 102건 처리시간 0.026초

In vitro micropropagation of water hyacinth (Eichhornia crassipes)

  • Suh, Eun-Jung;Park, Byoung-Mo;Han, Bong-Hee
    • Journal of Plant Biotechnology
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    • 제37권4호
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    • pp.505-510
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    • 2010
  • This study was conducted to refine a micropropagation method of water hyacinth (Eichhornia crassipes) in vitro. When young shoots were cultured on media with various concentrations of BA or TDZ alone, LS medium containing $5.0\;mgl^{-1}$ BA was found favorable for shoot proliferation from young shoots with a mean of 4.2 shoots. Using BA together with IAA, more shoots were obtained on LS medium containing $5.0\;mgl^{-1}$ BA and $1.0\;mgl^{-1}$ IAA with a mean of 5.7 shoots. In liquid medium, number of shoots and fresh weight per explant increased significantly. The best shoot proliferation and increasing of fresh weight were achieved on LS liquid medium containing $5.0\;mgl^{-1}$ BA and $1.0\;mgl^{-1}$ IAA with 6.9 shoots and more than 4,000 mg fresh weight. Of the different concentrations of LS salt, double strength of LS medium provided the highest shoot proliferation with 7.3 shoots, and fresh weight with 5,539 mg per explant. Shoot proliferation on LS medium containing $50\;gl^{-1}$ sucrose had better results with 8.7 shoots and 5,979 mg per explant in fresh weight than other conditions. In conclusion, the optimal level for shoot proliferation and biomass increase of water hyacinth was attained with the application of the double strength of LS medium containing $5.0\;mgl^{-1}$ BA, $1.0\;mgl^{-1}$ IAA and $50\;gl^{-1}$ sucrose.

Effect of Cytokinins on the Proliferation of Multiple Shoots in Horsegrgm [Macrotyloma uniflorum (Lam.) 'Verdc.]

  • Mohamed, Shamsudeen Varisai;Jawahar, Manikam;Thiruvengadam, Muthu;Jeyakumar, Masilamani;Jayabalan, Narayanasamy Pillai
    • Journal of Plant Biotechnology
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    • 제1권2호
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    • pp.79-83
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    • 1999
  • A method for induction of multiple shoots using cotyledonary nodes and shoot tips of Macrotyloma uniflorum (Lam.) Verdc. was described. The experiment was conducted in which shoot induction was noticed on Murashige and Skoog (MS) medium supplemented with different concentrations and combinations of four cytokinins (KIN, 2iP, Ads, BAP). These multiple shoots were later developed into normal shoots. The highest rate of shoot proliferation came from MS medium added with BAP 1.5 mg/L. The multiple shoot buds were subcultured into MS medium with BAP (0.5-1.5 mg/L) along with Ads (1.0 mg/L) and GA$_3$ (0.5 mg/L), which gave rise to the highest frequency of shoot proliferation and elongation. The shoots were rooted on MS medium supplemented with 1.75 mg/L IBA.

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Mass Propagation of Sundew, Drosera rotundifolia L. through Shoot Culture

  • Jang, Gi-Won;Park, Ro-Dong
    • Journal of Plant Biotechnology
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    • 제1권2호
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    • pp.97-100
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    • 1999
  • In order to establish in vitro propagation method of sundew, Drosera rotundifolia L., the effects of MS medium concentration, cytokinin type and concentration, pH, and auxin type and concentration on shoot proliferation and root formation were investigated using shoots at 3 month after seed germination. The highest shoot production was obtained with the half strength of MS ($\frac{1}{2}$ MS) medium than with any other strength of MS medium tested. Addition of kinetin or BA in $\frac{1}{2}$ MS medium was strongly suppressed shoot proliferation. The suppression of shoot proliferation was more effective in BA-supplemented $\frac{1}{2}$ MS medium than kinetin-supplemented. The optimum pH of the media for shoot proliferation was pH 5.7-6.7. Shoots were subcultured in $\frac{1}{2}$ MS medium supplemented with 0.5mg/L 2,4-D for rooting every 8 weeks. All subcultured shoots produced extensive root systems after 5 to 6 week culture. Plantlets after root development were planted in plastic pots filled with moss. The survival rate of plantlets was almost 100%. On subculturing every 8 weeks, hundreds of the plants were propagated from a single plant within a year.

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In vitro propagation of Bambusa nutans Wall. ex Munro through axillary shoot proliferation

  • Negi, Divya;Saxena, Sanjay
    • Plant Biotechnology Reports
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    • 제5권1호
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    • pp.35-43
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    • 2011
  • This communication describes for the first time an efficient and reproducible protocol for large-scale multiplication of Bambusa nutans. Nodal segments collected from field-grown clumps and cultured on Murashige and Skoog (MS) medium supplemented with $4.4{\mu}M$ benzylaminopurine (BA) and $2.32{\mu}M$ kinetin (Kin) gelled with 0.2% gelrite yielded 80% aseptic cultures with 100% bud-break. The in vitro-formed shoots obtained after bud-break were successfully multiplied in MS liquid medium supplemented with $13.2{\mu}M$ BA, $2.32{\mu}M$ Kin, and $0.98{\mu}M$ indole-3-butyric acid (IBA). Sub-culturing of shoots every 3 weeks on fresh multiplication medium yielded a consistent proliferation rate of 3.5-fold. Shoot clusters containing three to five shoots were successfully rooted with 100% success on half-strength MS liquid medium supplemented with $9.8{\mu}M$ IBA, $2.85{\mu}M$ indole-3-acetic acid (IAA), $2.68{\mu}M$ naphthaleneacetic acid (NAA), and 3% sucrose. Plantlets grown in vitro were acclimatized and subsequently transferred to the field. Inter-simple sequence repeat analysis has confirmed the genetic uniformity of the tissue-cultured plants up to 27 passages.

In vitro Micropropagation of Rosa hybrid L.

  • Kim Chang-Kil;Oh Jung-Youl;Jee Sun-Ok;Chung Jae-Dong
    • Journal of Plant Biotechnology
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    • 제5권2호
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    • pp.115-119
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    • 2003
  • To determine the appropriate concentrations of nutrients and growth regulators for shoot proliferation and root initiation, several rose hybrid tea cultivars were cultured. Cultured shoot tips and lateral buds from different cultivars proliferated multiple shoots on Murashige and Skoog (MS) medium supplemented with 0 to 4 mg/L BA and 0 to 0.05 mg/L NAA. The ability of the explants to proliferate shoots and initiate roots was affected by genotype, the nodal position of explant, the strength of MS basal medium and growth regulators used. The buds nearest the apex exhibited the slowest rate of development. Most cultivars had the highest shoot proliferation when cultured on MS medium with 2 mg/L BA and 0.01 mg/L NAA, but the degree varied by cultivars. Root development was enhanced by lowering the concentration of MS salts.

In vitro shoot proliferation of Alnus japonica (Thunberg) Steudel

  • Kang, Ho-duck;Lee, Min-Soon
    • Plant Resources
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    • 제7권1호
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    • pp.1-6
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    • 2004
  • In vitro proliferation system was achieved by using nodal segment excised from greenhouse grown juvenile stock plants of Alnus japonica. Stem explants were cultured on MS medium supplemented with different plant growth regulators of cytokinin and/or their combinations. The most effective cytokinin source was the combination of zeatin 2.0 mg/L and TDZ 0.05 mg/L producing the average number of shoots (16.8 $\pm$ 3.6). In addition, healthy roots were formed after small clumps of shoots were transferred to half strength of MS medium containing IBA 0.02 mg/L with optimal rooting capacity. Soil acclimatization was successfully conducted in cell tray containing artificially mixed soil with 92 % survival rate.

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Thidiazuron 처리에 의한 히어리나무의 기내번식 (Micorpropagation of Corylopsis coreana by Thidiazuron Treatment)

  • 강효진;문홍규;이재선
    • Journal of Plant Biotechnology
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    • 제30권3호
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    • pp.263-267
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    • 2003
  • This study was conducted to evaluate the effect of thidazuron(TDZ) on shoot proliferation and growth from axillary buds of 20-years-old Corylopsis coreana. Shoots proliferation was effectively achieved on WPM(Woody Plant Medium) supplemented with 0.03∼0.1mg/L TDZ. The highest shoot number(6.5$\pm$0.7) was obtained on 0.1mg/L TDZ treatment. On the TDZ medium shoots formed as clusters less than 1cm in height and therefore needed to subculture on GA$_{3}$ containing medium to induce elongation. In consecutive cultures, phenolic compounds were excreted at the proximal part of the explants and inhibited growth of the explants. Growth inhibition by the compounds was overcome using liquid and paper bridge culture system. About 60% of the elongated shoots rooted on half- strength MS medium containing IBA. Generally, IBA was mire effective on in vitro rooting than NAA with optimal range of 0.5mg/L to 1.0mg/L. Rooted plantlets were transferred in an artificial soil(vermculite) and acclimatized in high humidity greenhouse condition. Survival rate differed greatly depending on rooting types of the explants. Two types of rooting were observed. The first type was direct rooting from the explants. The second type was callus formation followed by rooting from the callus. The explants showing the 1st type rooting survived can be multiplicated in vitro by TDZ treatment followed by elongation with GA$_{3}$ and rooting with IBA.

In Vitro Propagation of Zingiberaceae Species with Medicinal Properties

  • Keng, Chan Lai;Hing, Thong Weng
    • Journal of Plant Biotechnology
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    • 제6권3호
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    • pp.181-188
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    • 2004
  • Zingiber officinale buds from the rhizomes were used to produce in vitro shoots. These explants produced the largest number of multiple shoots, 9.8 shoots per explant, when were cultured on MS (Murashige and Skoog 1962) medium supplemented with 2.0 mg/L benzyladenine (BA) and 2.0 mg/L indole butyric acid (IBA). This medium was also found to be suitable for in vitro propagation of other Zingiberaceae species: Alpinia conchigera, Alpinia galanga, Curcuma domestica, C. zedoaria and Kaempferia galanga. Both C. domestica and C. zedoaria produced more multiple shoots when were cultured in the liquid proliferation medium, MS medium containing 2.0 mg/L BA and 2.0 mg/L IBA. To maintain the in vitro plantlets of Zingiberaceae species, they were required to subculture every four weeks. After executing proper acclimatization protocol, in vitro plantlets of Alpinia galanga, A. conchigera, Curcuma domestica, C. zedoaria, Kaempferia galanga and Zingiber officinale could be successfully planted in the field with high percentage of survival.

새우난초(Calanthe discolor Lindl.)의 액아배양으로부터 다신초 형성을 통한 대량증식 (Micropropagation of Calanthe discolor Lindl. through Induction of Multiple Shoots from Axillary Bud Culture)

  • 임주홍;정미영;김창길;임기병;정재동
    • 화훼연구
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    • 제16권4호
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    • pp.239-246
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    • 2008
  • 새우난초의 액아로부터 다신초 형성을 통한 기내 대량 생산 체계를 확립하기 위하여 본 실험을 실시하였다. 액아로부터 신초 형성율은 1/2MS배지에 NAA $0.5mg{\cdot}L^{-1}$과 TDZ $2.0mg{\cdot}L^{-1}$를 첨가한 배지에 배양하여 4주간 암배양후 16시간 일장으로 배양하였을때 가장 높았다. 액아배양을 통해 얻어진 신초로부터 다신초 (multiple shoots) 증식에는 1/2MS 배지에 TDZ $4.0mg{\cdot}L^{-1}$와 IBA $2.0mg{\cdot}L^{-1}$를 첨가한 배지에서 신초형성수가 12.8개로 가장 양호하였다. 한편, 다신초 증식과정에서 비정상적인 신초가 형성되었으며 이들 비정상신초로부터 정상적인 신초로 회복은 생장조절제가 첨가되지 않은 1/2MS 배지에서 기장 효과적이었다. 다신초의 생장과 발근은 1/2MS 배지에 NAA $0.1mg{\cdot}L^{-1}$를 첨가한 배지에서 신초의 생장과 발근 모두 양호하였다. 발근된 새우난초 유묘는 NAA $10mg{\cdot}L^{-1}$용액에 30분간 침지 처리 후 TKS상토에 이식하였을 때 100% 순화하였으며 순화 후 전반적인 생육도 기장 양호하였다.

정아배양에 의한 산돌배나무의 기내번식 (Micropropagation Using Shoot Tip Culture of Pyrus ussuriensis Maximowicz)

  • 문흥규;이성재
    • 한국산림과학회지
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    • 제97권4호
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    • pp.452-457
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    • 2008
  • 산돌배나무의 기내번식 기술을 개발하고자 유묘의 정아를 재료로하여 기내 식물체 증식에 미치는 생장조절제의 효과를 시험하였다. 정아를 MS 배지에 BA 단독처리 혹은 BA+NAA 혼용처리 결과 대부분 줄기는 1-2개로 유도 되었으며 처리에 따른 차이는 나타나지 않았다. 줄기의 생장과정에서 정아괴저가 흔히 관찰되었으며 다경이 유도되는 줄기에서는 과수화 현상이 나타났고 줄기의 기부에는 캘러스가 형성되었다. 줄기의 증식 과정에서 BA+NAA 처리구에서 약 20%의 자발적인 발근이 이루어 졌다. 다경으로부터 얻어진 줄기는 gelrite 경화배지에서 기내발근이 저조하였으며, 기외삽목시 100 mg/L IBA 처리로 50%까지 발근되었다. 발근묘는 순화 후 정상적으로 생장하였다.