식물조직배양학회지 (Korean Journal of Plant Tissue Culture)

한국식물생명공학회 (The Korean Society of Plant Biotechnology)
권호 표지

Phosphinothricin acetyltransferase 유전자를 이용한 현사시의 형질전환

Transformation of Populus alba $\times$Populus glandulosa Using Phosphinothricin Acetyltransferase Gene

  • 오경은 (충북대학교 산림과학부) ;
  • 양덕춘 (한국인삼연초연구원 유전생리부) ;
  • 문흥규 (임업연구원 임목육종부) ;
  • 박재인 (충북대학교 산림과학부)
  • 발행 : 1999.07.01
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초록

우리나라의 주요 개량 포플러의 하나인 현사시 3호를 대상으로 Arobacterium tumefaciens MP 90/PAT을 이용하여 비선택성 제초제인 Basta에 내성을 갖는 형질전환체를 획득하고자 본 실험을 수행하였다. 기내 배양된 엽절편을 재료로 균주에 10분간 감염, 2일간 공조 배양 및 3주간 선발배지에서 배양으로 kanamycin에 내성을 갖는 잠정적인 형질전환 캘러스를 유도하였다. 선발된 캘러스로부터 배양 4주 후 줄기를 유도하였으며, 증식된 줄기는 발근시켜 완전한 형질전환체를 얻었다. 형질전환체는 PCR기법 및 Southern blot 분석으로 PAT 유전자 전이를 확인하고. 유전자의 발현은 GUS 유전자의 발색 반응으로 확인하였다. 형질전환체는 폿트로 이식하여 4주간 생장시킨 후 제초제 Basta로 살포한 결과 대조구 식물체는 고사되었으나, 형질전환체는 정상적인 생육이 가능하였다

This study was conducted to produce herbicide resistant plants by transferring phosphinothricin acetyltransferase (PAT) gene into Populus alba $\times$ Populus glandulosa No .3 using Agrobacterium tumefaciens MP 90/PAT. Leaf segments from in vitro grown shoots of hybrid poplar No. 3 were soaked in a AB medium containing Agrobacterium tumefaciens MP 90/PAT for 10 min and cocultivated for 2 days on MS medium containing 1.0 mg/L 2,4-D and 0.2mg/L kinetin (CIM). Putative transformed calli could be selected after cocultivation of leaf segments on CIM supplemented with 50mg/L kanamycin and 500mg/L cefotaxime for 3 weeks. The selected calli were cultured on CIM supplemented with 50 mg/L kanamycin and 500 mg/L cefotaxime for 5~8 weeks before transfer to WPM containing 1.0mg/L zeatin, 0.1mg/L BAP, 50 mg/L kanamycin and 500mg/L cefotaxime for shoot regeneration. Shoots were regenerated from the callus after 4 week cultivation, and the regenerants were grown on the same medium for 7~l0 weeks. The plants rooted on 1/2 WPM containing 0.2 mg/L IBA and 50 mg/L kanamycin. To confirm the gene insertion into plants, GUS activity was detected by histochemical assay in the transformed plants. Finally, the presence of both NPT II and PAT genes from the transgenic plants were confirmed by PCR amplification with the gene specific primers and subsequent PCR-Southern blot with DIG-labeled PAT gene probe. After acclimatization in pots for 4 weeks, the plants were sprayed by 3 mL/L of Basta to test resistance to the herbicide. The transgenic plants remained green, whereas all the control plants died after one week.

키워드

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