Journal of Plant Biotechnology

  • 제34권2호
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  • Pages.139-144
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  • 2007
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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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배추의 배축절편으로부터 캘러스와 뿌리 발생을 통한 안정적 형질전환

Stable Transformation via Callus Formation and Rhizogenesis from the Cultures of Hypocotyl Explant of Chinese Cabbage

  • Cho, Mi-Ae (Department of Medicinal Plant Resources, Nambu University) ;
  • Kim, Choon-Ae (Department of Medicinal Plant Resources, Nambu University) ;
  • Min, Sung-Ran (Plant Cell Biotechnology Laboratory) ;
  • Ko, Suck-Min (Eugenetech Inc., Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Liu, Jang-Ryol (Plant Cell Biotechnology Laboratory) ;
  • Choi, Pil-Son (Department of Medicinal Plant Resources, Nambu University)
  • 발행 : 2007.06.30
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초록

'정상' 배추의 배축절편을 선발마커로서 paromomycin 저항 성유전자를 갖고 있는 pPTN290으로 각각 형질전환된 EHA101, LBA4404, GV3101균주와 공동배양한 후 갤러스유도배지에서 형질전환캘러스를 얻은 후, 뿌리유도배지에서 부정근을 그리고 신초유도배지에서 신초를 각각 순차적으로 유도하였다. 형질전환캘러스를 얻은 후, 뿌리유도배지에서 부정근을 그리고 신초유도배지에서 신초를 가각 순차적으로 유도하였다. 형질전환캘러스 형성은 Agrobacterium균주에 따라 차이가 있었으며, 특히 EHA101균주에 공동배양된 배축절편으로부터 최대 6.1%까지 얻어졌다. 또한 각각의 형질전환캘러스 클론으로부터 형질전환 부정근과 신초 발생은 EHA101균주에서 60.7%와 38.2%, LBA4404에서 8.3%와 0%, GV3101에서 20.5%와 85.7%까지 각각 얻을 수 있었다. 형질전환식물체는 특별한 형태적 이상 없이 온실에서 정상적으로 자라 $T_{2}$종자를 얻을 수 있었다. GUS방법으로 7개의 후대 유식물체를 분석한 결과 gus유전자가 안정적으로 발현하고 있음을 확인하였고, 배추 genome에 single 또는 multiple copy로 전달되고 있음을 추측할 수 있었다.

Hypocotyl explants of Chinese cabbage (cvs. "Jeong Sang") produced transgenic calli on callus induction medium (MS salt, B5 vitamin, 5 mg/L acetosyringone, 1 mg/L 2,4-D, 3% sucrose, 400 mg/L cefotaxime, 100 mg/L paromomycin, pH 5.8) after cocultivation with strains of Agrobacterium tumefaciens (EHA101, LBA4404, GV3101) harboring the pPTN290 containing paromomycin-resistance gene as a selectable marker, and then they transferred to root induction medium (1/2MS salt, MS vitamins, 2% sucrose, 100 mg/L paromomycin, 100 mg/L cefotaxime, pH 5.8) and shoot induction medium (MS salt, B5 vitamin, 4 mg/L $AgNO_3$, 4 mg/L 6-benzyladenine, 3 mg/L alpha-naphthaleneacetic acid, 100 mg/L paromomycin, 100 mg/L cefotaxime, 3% sucrose, pH 5.8) in order. There was a significant difference in the frequency of transgenic calli depending on Agrobacterium strains. In particular, the highest frequency (6.1%) of transgenic calli was obtained from the hypocotyls cocultivated with EHA101 strains. Also, the frequency (%) of transgenic root and plants from each transgenic callus clone were obtained with 60.7% and 38.2% in EHA101, with 8.3% and 0% in LBA4404, with 20.5% and 85.7% in GV3101 strains, respectively. They were grown to maturity in a greenhouse and normally produced $T_2$ seeds. GUS histochemical assay for progeny ($T_2$) revealed that the transgenes was expressed in the plant genome, and progeny analysis from 7 independent transgenic events demonstrated that the transformants transmitted the transgene as a single or multiple functional locus.

키워드

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