Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of light-emitting diode (LED) on in vitro shoot growth and rooting in teak (Tectona grandis L.)

티크의 기내 줄기 생장 및 발근에 미치는 LED (light-emitting diode) 효과

  • Lee, Na-Nyum (Division of Forest Biotechnology, National Institute of Forest Science) ;
  • Kim, Ji-Ah (Division of Forest Biotechnology, National Institute of Forest Science) ;
  • Kim, Yong-Wook (Division of Forest Biotechnology, National Institute of Forest Science)
  • 이나념 (국립산림과학원 산림생명공학연구과) ;
  • 김지아 (국립산림과학원 산림생명공학연구과) ;
  • 김용욱 (국립산림과학원 산림생명공학연구과)
  • Received : 2019.11.07
  • Accepted : 2019.11.26
  • Published : 2019.12.31
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Abstract

This study was conducted to determine the effect of a light-emitting diode (LED) on in vitro shoot growth and rooting in teak (Tectona grandis L.). In the experiments with apical bud explants, the greatest shoot elongation (3.2 cm) occurred when they were cultured on DKW medium under 50% blue and 50% red LED mixture (BR), whereas no differences in growth were observed in different light sources (florescent light [F] or BR) or media (MS or DKW). The highest number of shoot multiplication (2.4/explant) or elongation (4.94 cm) was achieved with 0.5 or 1.0 mg/L 6-Benzyladenine (BA) treatment under BR. In addition, the best rooting rate (93.8%) or root length (1.3 cm) was recorded with 0.5 mg/L indole-3-butyric acid (IBA) treatment under BR, and the highest root induction (3.1/explant) was observed in 0.2 mg/L IBA under BR. The in vitro rooted plantlets were hardened and survived well on soil.

본 연구는 티크의 기내 생장 및 발근에 미치는 light-emitting diode (LED) 효과를 구명하기 위해 수행되었다. 티크의 정아 절편체의 줄기 신장은 LED 혼합광(BR, 50% 청색광 + 50% 적색광) 하에서 DKW 배지 배양 시 3.2 cm로 가장 좋았고, 줄기유도는 광원 및 배지(MS 및 DKW) 효과가 그리 크지 않은 것으로 나타났다. BA 농도 처리 시 최대 줄기 유도는 BR 광원 및 1.0 mg/L 처리구에서 2.4개, 최대 줄기 신장은 BR 및 0.5 mg/L 처리구에서 4.94 cm로 가장 효과적이었다. 발근에 영향하는 IBA 농도 효과는 정아 절편체를 BR 및 0.5 mg/L 처리구에서 배양 시 최대 발근율(93.8%)과 최대 뿌리 길이 신장(1.3 cm)을 보였고, 뿌리 수는 0.2 mg/L (3.1개/절편) 처리구에서 가장 좋은 것으로 나타났다. 발근 식물체는 상토로 이식 후 순화 과정을 거쳐 정상적은 생장을 보였다.

Keywords

References

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