Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of explant's position and culture method on shoot proliferation and micro-cuttings for a rare and endangered species, Abeliophyllum distichum Nakai

희귀 및 멸종위기 식물 미선나무(Abeliophyllum distichum Nakai)의 절편위치 및 치상방법에 따른 기내증식 및 미세삽목

  • Lee, Na Nyum (Division of Biotechnology, Korea Forest Research Institute) ;
  • Kim, Ji-Ah (Division of Biotechnology, Korea Forest Research Institute) ;
  • Kim, Yong-Wook (Division of Biotechnology, Korea Forest Research Institute) ;
  • Choi, Yong Eui (Depart. of Forestry, Kangwon Nat'l University) ;
  • Moon, Heung Kyu (Division of Biotechnology, Korea Forest Research Institute)
  • 이나념 (국립산림과학원 산림생명공학과) ;
  • 김지아 (국립산림과학원 산림생명공학과) ;
  • 김용욱 (국립산림과학원 산림생명공학과) ;
  • 최용의 (강원대학교 산림자원학과) ;
  • 문흥규 (국립산림과학원 산림생명공학과)
  • Received : 2015.08.10
  • Accepted : 2015.09.23
  • Published : 2015.09.30
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Abstract

Using either the apical or axillary bud of the endangered species Abeliophyllum distichum Nakai, we tested the effect of bud position and culture method on shoot proliferation and rooting. In shoot proliferation, the axillary bud explant was more effective than the apical bud and the effect was fostered by BA treatment, whereas no differences were observed in shoot elongation by the explant position. Spontaneous rooting was observed in the MS basal medium and resulted in conspicuous differences in the explant position : more than 80% in apical bud explant and 28% in axillary bud explant was achieved, respectively. The positional effects were also observed in BA pre-treatments: generally vertical culture method appeared to be better in shoot proliferation, growth, and rooting than that of the horizontal culture method regardless of the BA pre-treatment duration. The highest shoot multiplication was achieved through the vertical culture method with axillary bud explant, whereas the best shoot elongation and rooting was obtained using the vertical culture method with the apical bud explant. Apical bud explant was superior to axillary bud explant in ex vitro micro-cuttings and revealed a significant difference in shoot growth and root development. The above results suggest that explant position and culture method influence the efficiency of micropropagation for a rare and endangered plant Abeliophyllum distichum.

본 실험은 희귀 및 멸종위기 식물인 미선나무의 효과적인 증식을 위하여 줄기 증식, 생장 및 발근에 미치는 절편의 위치 효과 및 치상 방법의 효과를 구명하기 위해 실시되었다. 줄기유도는 BA를 처리한 액아절편 배양이 효과적이었으며 절편 당 2.4개의 줄기가 유도되었다. 정아 및 액아절편을 BA 1.0 mg/L를 전처리하여 수평과 수직으로 치상하였을 때 줄기유도는 액아 절편의 수직치상으로 절편 당 2.5개로 가장 좋았다. 반면 줄기의 생장, 발근 및 뿌리 발달은 정아절편의 수직치상에서 양호하였고 BA의 전처리 시간이 길어질수록 발근이 억제되는 경향을 보였다. 기내증식된 줄기의 정아 및 액아를 절편으로 기외에서 미세삽목(micro-cutting)을 실시하여정아절편에서 100% 발근되었고, 뿌리수는 개체 당 평균 6.2개로 가장 양호하였다. 미세삽목묘는 온실에서 95% 이상 순화되었다. 이상의 결과로 볼 때 미선나무의 기내 증식은 액아를 절편으로 BA 처리 후 수직 치상하는 방법이 효과적이며, 줄기의 생장 및 발근은 정아를 절편으로 수직치상 하는 것이 효과적으로 나타났다. 또한 정아를 절편으로 미세삽목을 통해 효과적인 발근 유도 및 순화가 가능하여 미선나무의 실용적인 묘목생산이 가능함을 보여주었다.

Keywords

References

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