Journal of Plant Biotechnology

  • 제45권3호
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  • Pages.266-272
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  • 2018
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  • 1229-2818(pISSN)
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  • 2384-1397(eISSN)
한국식물생명공학회 (The Korean Society of Plant Biotechnology)
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층층둥굴레(Polygonatum stenophyllum Maxim.)의 캘러스 유도 및 기내 식물체 분화

Callus induction and in vitro plant regeneration of Polygonatum stenophyllum Maxim.

  • 투고 : 2018.08.10
  • 심사 : 2018.08.23
  • 발행 : 2018.09.30
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초록

본 연구는 백합과에 속하며 환경부에서는 멸종위기종 리스트 중 관심종으로 분류된 층층둥굴레의 기내 증식에 미치는 연근별, 호르몬 종류와 농도별 배양환경을 조사하기 위해 수행되었다. 효과적인 캘러스 유도조건을 알아보고자 0.1, 0.5, 1.0, $1.5mg{\cdot}L^{-1}$의 2,4-D가 첨가된 MS배지에 1, 3, 5년생 층층 둥굴레 근경을 치상한 후에 캘러스 유도율을 조사한 결과, $0.5mg{\cdot}L^{-1}$ 2,4-D 배지에 2년생 근경 배양한 배지에서 87%의 캘러스 유도율을 보였다. 1년생 근경은 67%, 5년생 근경은 50%로 조사되었다. 층층둥굴레 캘러스 유래의 부정아 유도는 0.5 mg/L NAA 처리구에서 57%로 조사되었다. 호르몬이 첨가되지 않은 대조구에서는 부정아가 유도되지 않았다. 층층둥굴레 부정아의 신장과 발근에 적합한 호르몬의 종류와 농도를 조사하였다. 층층둥굴레 부정아 신장의 최적 조건은 $0.1mg{\cdot}L^{-1}$ BA 호르몬이 첨가된 배지이고 BA의 농도가 높아질수록 감소하는 경향을 보였다. 그리고 기내에서 무균적으로 온전한 개체를 생산하기 위해 shoot 부위가 신장된 부정아에서 발근에 적합한 배지를 조사하였다. 발근에 적합한 조건은 호르몬이 첨가되지 않은 대조구이며 뿌리의 길이는 11 cm로 조사되었다. 본 연구결과에서 층층둥굴레 연생별 근경, 옥신종류 및 농도에 따른 최적의 캘러스 유도조건을 조사하였고, 유도된 캘러스를 이용하여 분화에 최적조건을 조사하였다. 또한 발근에 필요한 최적의 조건을 조사하여 성공적인 기내배양을 통한 재분화 시스템을 확립하였다. 이러한 결과는 향후 층층둥굴레의 개체보전과 생물소재 활용을 위한 소재확보에 중요한 기초자료를 제공할 것으로 생각된다.

A Polygonatum stenophyllum Maxim. is an important endangered plant belonging to the family Liliaceae. A method was developed for the rapid micropropagation of P. stenophyllum through plant regeneration from rhizome (1-year, 3-years, and 5-years) explant-derived calli. The rhizome segments were cultured in Murashige and Skoog (MS) medium supplemented with varying concentrations of 2,4-D (0, 0.5, 1.0, $1.5mg{\cdot}L^{-1}$) for callus induction. In media supplemented with $0.5mg{\cdot}L^{-1}$ of 2,4-D, 87% of 3-years rhizome produced callus. Subsequently, the callus was transferred to 1/2MS medium supplemented with various concentrations of IAA, IBA, NAA, and 2,4-D (0, 0.1, 0.5 and $1.0mg{\cdot}L^{-1}$) for adventitious shoot formation. The highest percentage of adventitious shoot induction (57%) was observed in 1/2MS medium containing $0.5mg{\cdot}L^{-1}$ of NAA. Elongation of the adventitious shoot was achieved in 1/2MS medium supplemented with $0.1mg{\cdot}L^{-1}$ of BA. Rooting was achieved in 1/2MS medium without any hormones. It is hypothesized that the stated in vitro propagation protocol will be useful for conservation and mass propagation of the endangered Polygonatum stenophyllum Maxim. for bioresources.

키워드

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