Korean Journal of Plant Tissue Culture (식물조직배양학회지)

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Production of Herbicide-resistant Transgenic Plants from Embryogenic Suspension Cultures of Cucumber

오이의 배발생 현탁 배양세포로부터 제초제 저항성 형질전환 식물체 생산

  • 우제욱 (생명공학연구소 식물세포공학연구실) ;
  • 정원중 (생명공학연구소 식물세포공학연구실) ;
  • 최관삼 (충남대학교 응용생물화학식품학부) ;
  • 박효근 (서울대학교 원예학과) ;
  • 백남긴 (중앙종묘(주)) ;
  • 유장렬 (생명공학연구소 식물세포공학연구실)
  • Published : 2001.01.01
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Abstract

To develop herbicide-resistant cucumber plants (Cucumis sativus L. cv Green Angle) embryogenic suspension cultures were co-cultured with Agrobacterium tumefaciens strain LBA4404 carrying a disarmed binary vector pGA-bar. The T-DNA region of this binary vector contains the nopalin synthase/neomycin phosphotransferase Ⅱ (npt Ⅱ) chimeric gene for kanamycin resistance and the cauliflower 35S/phosphinothricin acetyltransferase (bar) chimeric gene for phosphinothricin (PPT) resistance, After co-cultivation for 48 h, embryogenic calli were placed on maturation media containing 20 mg/L PPT. Approximately 200 putatively transgenic plantlets were obtained in hormone free media containing 40 mg/L PPT. Northern blot hybridization analysis confirmed the expression of the bar gene that was integrated into the genome of five transgenic plants. Transgenic cucumber plants were grown to maturity. Mature plants in soil showed tolerance to the commercial herbicide (Basta) of PPT at the manufacturer's suggested level (3 mL/L).

제초제 저항성 오이 (Cucumis sativus L. cv Green angel)를 생산하기 위하여 배발생 현탁배양세포와 binary vector pGA-bar을 지닌 Agrobacterium tumefacians (LBA4404)를 공동배양하였다. 형질전환 벡터의 T-DNA부분에는 kanamycin에 저항성을 나타내는 neomycin phosphotrans ferase (npt II) 유전자와 phosphinothricin (PPT)에 저항성을 나타내는 phosphinothricin acetyltransferase (bar) 유전자를 지니고 있다. 48시간의 공동배양 후 배발생 캘러스는 20mg/L PPT가 함유된 성숙배지에서 배양하였다. 약 200개체의 형질전환 유식물체를 40mg/L PPT가 첨가된 호르몬이 없는 배지에서 생산하였다. 5개의 오이 형질전환 식물체의 염색체에 bar유전자가 도입되어 발현되는 것을 northern blot 분석을 통하여 확인하였다. 형질전환 오이 식물체가 토양에서 성숙되었다. 성숙한 오이 식물체는 PPT가 함유된 상업적 제초제 (Basta)를 일반적인 사용 농도 (3ml/L)처리시에도 저항성을 나타내며 생장하였다.

Keywords

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