Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Efficient Gene Introduction into Rice Callus by Using Particle Inflow Gun System

Particle Inflow Gun을 이용한 벼 캘러스 내의 효율적 유전자 도입

  • Song, In-Ja (College of Agricultural & Life Science, Sunchon National University) ;
  • Bae, Chang-Hyu (College of Agricultural & Life Science, Sunchon National University) ;
  • Choi, Dae-Ock (College of National Science, Sunchon National University) ;
  • Ryo Akashi (Division of Grassland and Animal Production, Faculty of Agriculture, Miyazaki University) ;
  • Lee, Hyo-Yeon (College of Agricultural & Life Science, Sunchon National University)
  • Published : 2002.12.01
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Abstract

We have developed a homemade particle inflow gun (PIG) system which has simple operation method, low price and high gene introduction efficiency into rice callus. Rice callus were inflowed with gold particles containing DNA of a plasmid, pIG121Hm, harboring intron GUS ($\beta$-glucuronidase) gene, NPTII gene and HPT gene. For optimal GUS transient expression, the effects of parameters on DNA delivery efficiency of the PIG system was investigated by scoring transient GUS expression. The highest number of blue spots was observed at 16 mM of spemidine and 1.5 M of calcium chloride, respectively. And the amount of gold particles required for the best GUD expression was 2 mg. Optimum GUS transient expression was observed at target distance of 12 cm and helium pressure of 3.5 bar (50 psi). Gene introduction efficiency of the PIG system was observed almost similar to that of the Biolistic Gun (Bio-Rad Company). Since PIG system is simple to operate and one doesn't need disposable accessaries, the PIG system can be easily applied to various replication experiments.

본 연구실에서 개발된 particle inflow gun (PIG)은 조작이 간편하고, 사용비용도 저렴하며, 식물 세포 내의 유전자 도입효율이 높은 특징을 갖고 있다. PIG 장비를 이용하여 벼 캘러스 내로의 유전자 도입 조건을 검토하기 위해서 사용된 vector는 pIG121Hm으로서 T-DNA 내부에 intron GUS ($\beta$-glucuronidase)와 hygromycin 및 kanamycin 저항성 유전자를 포함하고 있다. 또한 벼 캘러스 내에 물리적으로 DNA를 도입할 때에 DNA 도입 효율과 관계가 높은 요인들을 GUS의 발현빈도를 통하여 조사하였다. 그 결과 gold particle에 DNA를 부착하는 과정에 사용되는 spermidine과 calcium chloride의 경우 무첨가구에 비해 16 mM의 spermidine과 1.5 M의 calcium chloride 첨가구에서 GUS 발현율이 각각 2배, 3배 증가하였다. 그리고 1회 분사되는 gold particles양이 2 mg의 경우 가장 높은 GUS 발현율을 보여주었으며, 또한 PIG장비의 분사거리와 헬륨의 압력은 벼의 배양세포의 경우 12cm의 분사거리에서 3.5 bar (50 psi)의 헬륨압력으로 분사하였을 때 GUS 발현율이 가장 높았다. 이상의 결과에서 PIG 장비를 이용한 유전자 도입은 본 연구에서 검토한 최적의 조건을 이용하였을 경우 기존에 많이 사용되고 있는 Biolistic Gun (Bio-Rad 사)과 거의 비슷한 유전자 도입효율을 보여 주었다. 특히 PIG 장비의 경우 조작이 매우 간편하고, 분사에 사용되는 일회용 부품이 필요하지 않기 때문에 대량의 반복실험을 필요로 하는 연구에서 손쉽게 사용되리라 기대된다.

Keywords

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