Abstract

본 연구의 목적은 희귀 및 멸종위기식물인 솔나리(Lilium cernum Komarov.) 기내 종자발아체의 인편으로부터 캘러스 유래의 식물체 재분화 조건을 확립하고자 하였다. 식물생장조절물질인 kinetin과 NAA 또는 2,4-D를 조합한 MS배지에 인편절편을 배양하였다. Kinetin과 NAA, 2,4-D를 혼합하여 처리한 모든 처리구에서 95% 이상의 캘러스 형성율을 보였으며, <TEX>$3.0mg{\cdot}L^{-1}$</TEX>의 kinetin과 <TEX>$1.0mg{\cdot}L^{-1}$</TEX>의 NAA를 조합처리한 MS배지에서 캘러스의 무게가 226 mg으로 가장 무거웠고, 캘러스 크기도 가장 우수하였다. 솔나리의 인편유래 캘러스로부터 자구형성에 미치는 BA와 NAA의 효과를 알아보기 위해 BA와 NAA를 조합한 MS배지에 캘러스를 배양하였다. 그 결과, <TEX>$2.0mg{\cdot}L^{-1}$</TEX> BA와 <TEX>$1.0mg{\cdot}L^{-1}$</TEX> NAA 혼합한 MS배지에서 78%의 높은 자구유도율을 보였다. MS배지 및 sucrose의 농도가 기내 건전 식물체 생산에 미치는 영향을 조사하기 위해 실험한 결과, 유의적 차이는 없이 모든 대조구와 실험구에서 건전한 유식물체를 생산할 수 있었고, 엽록소의 함량은 sucrose의 농도가 증가할수록 높아짐을 확인하였다. Lilium cernum Komarvo. is an important endangered plant belonging to the family Liliaceae. A method was developed for the rapid micropropagation of L. cernum through plant regeneration from bulb scales explant-derived calli. The bulb scales segments were cultured on Murashige and Skoog (MS) medium supplemented with 0, 0.5, 1.0, <TEX>$3.0mg{\cdot}L^{-1}$</TEX> kinetin and 0, 0.1, 0.5, <TEX>$1.0mg{\cdot}L^{-1}$</TEX> NAA or 2,4-D for callus induction. In media with <TEX>$0.5{\sim}3.0mg{\cdot}L^{-1}$</TEX> kinetin and <TEX>$0.1{\sim}1.0mg{\cdot}L^{-1}$</TEX> NAA and 2,4-D, 95~100% of explants produced callus. They were then transferred to MS medium supplemented with various concentrations of NAA (0, 0.01, 0.05 and <TEX>$1.0mg{\cdot}L^{-1}$</TEX>) in combination with BA (0, 1.0 and <TEX>$2.0mg{\cdot}L^{-1}$</TEX>) for bulbet formation. Bulbet induction (78%), weight (468 mg) and size (15.5 mm) were obtained the highest on MS medium containing <TEX>$2.0mg{\cdot}L^{-1}$</TEX> BA and <TEX>$1.0mg{\cdot}L^{-1}$</TEX> NAA. In vitro frequency of plant regeneration was not significantly treated in strength of MS and sucrose concentration. Chlorophyll contents in 1/2MS with <TEX>$50g{\cdot}L^{-1}$</TEX> sucrose treatments were higher than those in control and another treatment. This in vitro propagation protocol will be useful for conservation and mass propagation of this endangered plant.

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