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Microtuberization and Acclimatization in the Dioscorea cayenensis Thunb. by the Carbon Source

탄소급원에 의한 얌의 기내 비대근 형성과 순화

  • Lee, Na Nyum (Forest Biotechnology Division, National Institute of Forest Science (NIFoS)) ;
  • Kim, Ji Ah (Forest Biotechnology Division, National Institute of Forest Science (NIFoS)) ;
  • Kim, Yong Wook (Special Forest Products Division, National Institute of Forest Science (NIFoS)) ;
  • Kim, Tae Dong (Forest Biotechnology Division, National Institute of Forest Science (NIFoS))
  • 이나념 (국립산림과학원 산림생명공학연구과) ;
  • 김지아 (국립산림과학원 산림생명공학연구과) ;
  • 김용욱 (국립산림과학원 산림소득자원연구과) ;
  • 김태동 (국립산림과학원 산림생명공학연구과)
  • Received : 2017.11.18
  • Accepted : 2018.06.06
  • Published : 2018.06.30

Abstract

In this experiment, we investigated the effects of various carbon sources and concentrations on the microtuber induction and acclimatization of the yam (Dioscorea cayenensis). First, the effects of the in vitro carbon sources and concentrations on the microtuber induction were examined. The highest efficiency of the microtuber induction was obtained in the 7% sucrose treatment, whereas the glucose treatment shows no effect on the microtuber formation. Secondly, the effects of the survival rate and the microtuber formation rate after the acclimatization were examined. The diameter (6.1 mm) and fresh weight (0.5g) of the tuberous root are the highest in the pretreatment of the 7% sucrose. Although the survival rate of the pretreatment of the low concentration sucrose (3% sucrose) is 100 %, the growth and development were inhibited. These results suggest the 7% sucrose treatment is appropriate for the yam microtuber formation and acclimatization. In addition, this protocol could be used for the propagation of virus- or disease-free clones and the multiplication of elite yam cultivars.

이 실험에서 우리는 얌의 기내 비대근 유도와 순화에 영향을 미치는 탄소급원의 효과를 연구하였다. 첫 번째로 기내 비대근 유도를 위한 탄소원의 종류와 농도의 효과를 실험하였다. 7% sucrose처리에서 기내 비대근 유도 효율이 가장 높았으며, glucose처리에서는 기내비대근이 형성되지 않았다. 두 번째로 기내식물체의 순화 후 생존율과 비대근 형성율을 실험하였다. 순화 후 형성된 비대근의 직경(6.1 mm)과 생중량(0.5 g)은 7% sucrose에서 생육한 기내식물체에서 가장 높았다. 저농도(3%)의 sucrose처리에서 생육한 기내식물체의 순화 후 생존율은 100%였으나 식물체의 생육과 발달이 억제되었다. 이러한 결과는 얌의 기내 비대근 형성과 순화를 위해 7% sucrose처리가 적정하며 이러한 기술은 얌의 바이러스 및 병 저항성 클론과 우수 개체의 번식을 위해 적용이 가능하다.

Keywords

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