Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Use of Paromomycin as a Selectable Marker for the Transformation of Chinese Cabbage

배추의 형질전환용 선발항생제로서 Paromomycin의 이용

  • Cho, Mi-Ae (Eugentech Inc., Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Min, Sung-Ran (Plant Cell Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology(KRIBB)) ;
  • Ko, Suck-Min (Eugentech Inc., Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Liu, Jang-Ryol (Plant Cell Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology(KRIBB)) ;
  • Lee, Jun-Haeng (Department of Medicinal Plant Resources, Nambu University) ;
  • Choi, Pil-Son (Department of Medicinal Plant Resources, Nambu University)
  • Published : 2006.12.30
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Abstract

Hypocotyl explants of Chinese cabbage (us. 'Jeong Sang' and 'Seoul') produced adventitious shoots on Murashige and Skoog (MS) basal medium supplemented with 4mg/L $AgNO_3$, 5 mg/L acetosyringone, 4 mg/L 6-benzyladenine and 3mg/L alpha-naphthaleneacetic acid (SI) after cocoultivation with strains of Agrobacterium tumefaciens (LBA4404) harboring the pCAMBIA1301 and the $_PPTN290$ containing hygromycin-resistance gene and paromomycin-resistance gene as a selectable marker genes, respectively. There was a significant difference in the frequency of transgenic plants depending on antibiotics and cultivars used. Paromomycin was better than hygromycin, and cultivar 'Jeong-sang' was higher than 'c.v. Seoul' in the frequency of transgenic plants. In particular, the highest frequency (0.70%) of transgenic plants was obtained from selection medium (SI) containing 100mg/L paromomycin in c.v., 'Jeong-sang' GUS positive response were obtained 9 plants and 3 plants from the cultivars, 'Jeong-sang' and 'Seoul', respectively. They were grown to maturity in a greenhouse and normally produced $T_1$ seeds. GUS histochemical assay for progeny $(T_1)$ revealed that the transgenes were expressed in the plant genome.

정상' 배추와 '서울' 배추의 배축절편을 선발마커로서 hygromycin 저항성유전자를 갖고 있는 pCAMBIA1301와 paromomycin저항성유전자를 갖고 있는 pPTN290으로 각각 형질 전환된 LBA4404 또는 EHA101균주와 공동배양한 후 선발배지에서 배양하면서 형질전환체를 선발하였다. 형질전환빈도는 사용된 항생제와 품종에 따라서 현저하게 차이가 있었으며, 특히 paromomycin은 hygromycin보다 효과적이었고 정상 배추는 서울배추보다 양호하였다. 가장 높은 형질전환빈도는 (0.70%) 100mg/L paromomycin이 첨가된 선발배지에서 정상배추의배축을 배양할 경우 얻어졌다. GUS양성반응으로 확인 한 결과 정상배추에서 9개체와 서울배추에서 3개체를 각각 얻었으며, 온실에서 생장한 후 $T_1$종자를 수확하였다. $T_1$ 종자를 다시 발아시켜 유식물체를 얻은 후 GUS양성반응을 확인함으로서 외래유전자가 안정적으로 발현하고 있음을 확인하였다.

Keywords

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