Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Somatic Embryo Germination and the Related Biochemical Changes of Liriodendron tulipifera by Bioreactor Immersion Time

생물반응기 내 침지시간에 따른 백합나무 체세포배 발아 및 생화학적 변화

  • An, Chan-Hoon (Department of Forestry, Graduate School, Kangwon National University) ;
  • Yi, Jae-Seon (College of Forest and Environment Sciences, Kangwon National University) ;
  • Kim, Yong-Wook (Division of Forest Biotechnology, Korea Forest Research Institute) ;
  • Moon, Heung-Kyu (Division of Forest Biotechnology, Korea Forest Research Institute)
  • 안찬훈 (강원대학교 대학원 임학과) ;
  • 이재선 (강원대학교 산림환경과학대학) ;
  • 김용욱 (국립산림과학원 산림생명공학과) ;
  • 문흥규 (국립산림과학원 산림생명공학과)
  • Received : 2010.04.02
  • Accepted : 2010.05.17
  • Published : 2010.06.30
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Abstract

To determine physical and physiological factors for Liriodendron tulipifera L. somatic embryo germination, temporary immersion bioreactor (TIB) system was investigated. It was designed to immerse liquid media with plantlets so that it was able to adjust the immersion time. Immersion of 120 minutes every 4 hours and 60 minutes every 4 hours was found to be effective in germination (91.64%, 85.67%, respectively). However, hyperhydricity of the plantlets was higher in short immersion time (15 minutes every 6 hours) and long immersion time (120 minutes every 4 hours) (51.61%, 34.28%, respectively). Immersion of 60 minutes every 4 hours showed the lowest hyperhydric plantlets, and also it showed the lowest activities of abscisic acid (ABA), superoxide dismutase (SOD), and catalase. The overall results implied that immersion time of media affected germination and growth of somatic embryo, and it was able to make use of germination and growth of L. tulipifera somatic embryos.

본 연구는 백합나무의 효율적인 기내번식법 개발을 위하여 temporary immersion 방식의 생물반응기(TIB)를 이용한 체세포배 발아에 미치는 몇 가지 요인을 구명하고자 실시하였다. 사용된 생물반응기는 간헐적으로 배지가 식물체에 접촉되도록 설계되어 배지의 침지시간을 임의로 조절하였다. 본 방식을 통한 백합나무 체세포배 발아율은 배지의 침지시간이 상대적으로 길었던 매 4시간 마다 120분씩 침지시킨 처리구와 매 4시간 마다 60분씩 침지시킨 처리구에서 높게 나타났다(각각 91.64%, 85.67%). 하지만 식물체의 과수화 비율은 침지시간이 상대적으로 짧았던 매 6시간 마다 15분씩 침지시킨 처리구와 상대적으로 길었던 매 4시간 마다 120분씩 침지시킨 처리구에서 높게 나타났다(각각 51.61%, 34.28%). 매 4시간 마다 60분씩 배지를 침지시킨 처리구에서 과수화된 식물체가 가장 적게 나타났으며, abscisic acid (ABA), superoxide dismutase (SOD) 및 catalase의 함량이 가장 적은 것으로 나타났다. 본 실험에서 생물반응기내 배지 침지 시간은 체세포배 발아시 스트레스 요소로서 작용하여 발아 및 식물체 생장의 차이를 보여주었다. 이상의 결과는 TIB방식의 생물반응기를 통해 백합나무의 효율적인 발아가 가능함을 보여주었다.

Keywords

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