Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Establishment of tissue culture and acclimatization method for in vitro mass propagation of Echeveria laui and Echeveria elegans

에케베리아 라우이(Echeveria laui)와 엘레강스(Echeveria elegans)의 대량증식을 위한 조직배양 및 순화 조건 확립

  • 김윤희 (경기도농업기술원 선인장다육식물연구소) ;
  • 이지영 (경기도농업기술원 선인장다육식물연구소) ;
  • 김혜형 (경기도농업기술원 원예연구과) ;
  • 이재홍 (경기도농업기술원 선인장다육식물연구소) ;
  • 정재홍 (경기도농업기술원 선인장다육식물연구소) ;
  • 이상덕 (경기도농업기술원 선인장다육식물연구소)
  • Received : 2019.03.18
  • Accepted : 2019.03.21
  • Published : 2019.03.31
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Abstract

The objective of this study was to investigate the suitable parts for callus induction and optimal concentrations of growth regulators contained in the medium affecting shooting and rooting Echeveria laui and Echeveria elegans for in vitro mass production. To determine the suitable plant parts for callus induction, the leaves were divided into upper, medium and bottom parts and cultured on MS medium at different concentrations with $0{\sim}2mgL^{-1}\;NAA$ and $0{\sim}4 mgL^{-1}BA$. The upper and middle parts of leaves both showed 100% callus formation rate with $NAA\;1\;mgL^{-1}$ and $BA\;1\;mgL^{-1}$ treatment in E. laui. The middle parts of leaves showed 83.3% callus formation rate at $NAA\;2\;mgL^{-1}$ and BA 4 mgL-1 treatment in E. elegans. The shoot induction rate from callus was highest at $NAA\;0.1\;mgL^{-1}$ and $BA\;3\;mgL^{-1}$ treatment in E. laui and $NAA\;0.3\;mgL^{-1}$ in E. elegans. In addition, the number of shoots formation was 10.4 shoots high in $NAA\;1\;mgL^{-1}$ and $BA\;1\;mgL^{-1}$ treatment in E. laui and 12.0 shoots in most effective $NAA\;1\;mgL^{-1}$ and $BA\;0.1\;mgL^{-1}$ treatment in E. elegans. In the case of acclimatization of regenerated plant, growth characteristics did not show any significant difference (35 ~ 55%) shading with respect to the different ratio of substrate mixture, and it was determined that would be appropriate considered plant height and appearance preference of E. laui and E. elegans. It was established that the optimization of culture condition was responsible for the mass propagation in vitro cultures of E. laui and E. elegans.

에케베리아 라우이(Echeveria laui)와 엘레강스(Echeveria elegans)의 기내 식물체 대량생산을 위하여 캘러스와 신초 유도, 신초생장과 발근에 영향을 미치는 생장조정제 종류 및 농도를 구명하고 형성된 식물체의 기외 순화조건을 구명하고자 본 연구를 수행하였다. 캘러스 유도에 적합한 부위를 구명하기 위해 잎을 상부, 중부, 하부로 나누어 NAA와 BA의 농도별로 치상한 결과, E. laui는 엽상중부를 이용 하였을 때 $NAA\;1\;mgL^{-1}+BA\;1\;mgL^{-1}$의 혼용처리에서 캘러스가 100% 형성되었으며, E. elegans는 엽중부에서 $NAA\;2\;mgL^{-1}+BA\;4\;mgL^{-1}$ 혼용배지가 83.3%로 가장 높은 캘러스 형성을 보여 캘러스 형성에 효율적일 것으로 생각된다. 캘러스로부터 신초 형성율은 E. laui에서는 $NAA\;0.1\;mgL^{-1}+BA\;3\;mgL^{-1}$ 혼용배지, E. elegans는 $NAA\;0.3\;mgL^{-1}$ 단용배지에서 가장 높았다. 또한 신초의 증식에 적합한 배지는 E. laui는 $NAA\;1\;mgL^{-1}+BA\;1\;mgL^{-1}$ 혼용배지에서 신초가 10.4개, E. elegans는 $NAA\;1\;mgL^{-1}+BA\;0.1\;mgL^{-1}$ 혼용배지에서 12.0개로 신초가 가장 많이 형성되었으며, 형성된 재분화체는 정상적인 식물체로 생장하였다. 기외 순화조건의 경우, 용토에 따라 생육은 큰 차이를 보이지 않았으며, 관상가치를 고려하여 차광막 35 ~ 55%에서 순화 처리하는 것이 적합할 것으로 판단된다. 이러한 결과는 최적의 기내 배양 조건 및 재분화 식물체 순화조건 체계확립을 통해 고부가 다육식물인 E. laui와 E. elegans의 대량생산이 가능할 것으로 기대된다.

Keywords

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