Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Medium Composition Affecting In Vitro Plant Regeneration and Acclimation of Pteris cretica 'Wilsonii'

Pteris cretica 'Wilsonii'의 기내 식물체 재생에 미치는 배지구성물질의 영향 및 기외순화

  • Shin, So-Lim (Dept. of Horticultural Science, Chungbuk National University) ;
  • Lee, Cheol-Hee (Dept. of Horticultural Science, Chungbuk National University)
  • 신소림 (충북대학교 응용생명환경학부 원예과학과) ;
  • 이철희 (충북대학교 응용생명환경학부 원예과학과)
  • Published : 2009.10.31
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Abstract

Adventitious shoots were induced from pinnae, petiole and rhizome in Pteris cretica 'Wilsonii' in order to develop the efficient mass propagation method, using in vitro culture. Only homogenized rhizome segments could regenerate young sporophytes. Efficient regeneration of multiple shoots was obtained on the one-eighth strength MS medium containing 1% sucrose, and $50mg{\cdot}L^{-1}$ $NaH_2PO_4$. To achieve higher rate of regeneration from rhizome segments, rhizome segments were exposed to growth regulators for 2 months and then subcultured on hormone-free medium. The greatest shoot regeneration was obtained by $1{\mu}M$ kinetin with $5{\mu}M$ NAA. BA was effective in formation of GGB (kind of meristems), but they showed low shoot regeneration rate. Plants obtained from present experiments were transplanted to examine good environmental conditions for acclimation. Juvenile plants obtained by the one-eighth strength MS medium showed highest survival rate and vigorous growth at the seedling stage.

기내배양을 이용하여 Pteris cretica 'Wilsonii'의 효율적인 대량번식법을 개발하기 위한 목적으로 근경, 엽신 및 엽병조직으로부터 식물체 재분화를 유도하였다. 그 결과, 균질화된 근경의 절편에서만 신초가 재생되었다. 식물체 재분화를 유도하는데 적합한 배지는 1%의 sucrose와 $50\;mg{\cdot}mL^{-1}$의 $NaH_2PO_4$를 첨가한 1/8MS배지였다. 근경 절편으로부터 식물체의 재생을 촉진하기 위하여 생장조절물질이 첨가된 배지에서 2달 동안 절편을 배양한 후, 생장조절물질을 첨가하지 않은 배지로 이식한 결과, $1{\mu}M$의 kinetin과 $5{\mu}M$의 NAA를 혼용첨가한 처리구에서 신초의 재생이 가장 왕성하였다. BA 첨가구에서는 분열조직의 일종인 GGB가 다량 유도되었으나, 형성된 GGB에서 신초 재생율은 낮은 것으로 나타났다. MS배지의 적정 무기물 및 비타민의 농도를 구명하는 실험을 마친 뒤, 형성된 유묘를 이용하여 기외순화 시킨 결과, 1/8MS배지에서 형성된 유묘가 생존율이 가장 높았으며, 생육 또한 왕성하였다.

Keywords

References

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