Introduction of rolC gene into Petunia hybrida

Petunia hybrida 세포내로의 rolC 유전자의 도입

  • Published : 1999.01.01

Abstract

These experiments were attempted to introduce rolC gene in the Petunia hybrida cv. Titan white by Agrobacterium mediated. The maximum frequency of shoot regeneration was obtained by 60% on MS medium containing 1.0 mg/L BA, 0.1 mg/L NAA, 200 mg/L kanamycin, 500 mg/L carbenicillin, 30 g/L sucrose, and 8 g/L agar. Kanamycin-resistant calli were selected from petunia leaf discs by cocultivation with Agrobacterium suspension cultures on MS medium. The addition of AgNO$_3$ and KMnO$_4$ in the medium increased the shoot regeneration by 31.3% from leaf disc as compared with non-treated leaf disc. Among clones exhibiting kanamycin resistance, only 3 clones were confirmed by southern hybridization analysis.

쌍떡잎식물체 형질전환에 널리 쓰이는 Agrobacterium의 binary vector를 이용하여 왜화성을 나타내는 pGA643-rolC gene을 엽절편 transformation방법으로 petunia에 도입하였다. Petunia hybrida의 재분화에 있어 엽조직으로부터 식물체 재분화에 미치는 생장조절물질의 효과는 0.1mg/L NAA와 1.0mg/L BA의 조합에서 높았고 재분화된 식물체도 양호하였다. 식물체 형질전환 선발배지에 에틸렌 억제제인 AgNO$_3$와 KMnO$_4$의 첨가시 형질전환체 재분화율이 높게 나타났으며, AgNO$_3$에 비해 KMnO$_4$처리구에서 보다 많은 식물체 재분화율을 나타내었으나 AgNO$_3$와 KMnO$_4$의 고농도 첨가시 다소의 유리화 현상이 발생하였으므로 3mg/L KMnO$_4$ 첨가가 식물체 재분화에 적합한 것으로 생각된다. 항생제 200mg/L kanamycin, 500mg/L carbenicylin 과 1.0 mg/L BA, 0.1mg/L NAA가 첨가된 형질전환 선발배지에서 엽절편으로 부터 형질전환 된 것으로 추정되는 식물체들을 일차 선발하였고 기외로 이식한 후 genomic DNA를 분리하여 Southern blot analysis법으로 분석한 결과 외래 유전자가 식물체의 genomic DNA내로 삽입된 것을 확인할 수 있었다.

Keywords

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