Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Development of Industrial Transgenic Plants Using Antioxidant Enzyme Genes

항산화효소 유전자를 이용한 산업용 형질전환식물체 개발

  • Lee, Haeng-Soon (Plant Cell Biotechnology Lab., Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kim, Kee-Yeun (Samyang Genex Biotech Research Institute, Samyang Genex Corp.) ;
  • Kwon, Suk-Yoon (Plant Cell Biotechnology Lab., Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kwak, Sang-Soo (Plant Cell Biotechnology Lab., Korea Research Institute of Bioscience and Biotechnology (KRIBB))
  • 이행순 (한국생명공학연구원 식물세포공학연구실) ;
  • 김기연 ((주)삼양제넥스 생명공학연구소) ;
  • 권석윤 (한국생명공학연구원 식물세포공학연구실) ;
  • 곽상수 (한국생명공학연구원 식물세포공학연구실)
  • Published : 2002.06.01
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Abstract

Oxidative stress derived from reactive oxygen species (ROS) is one of the major damaging factors in plants exposed to environmental stress. In order to develop the platform technology to solve the global food and environmental problems in the 21st century, we focus on the understanding of the antioxidative mechanism in plant cells, the development of oxidative stress-inducible antioxidant genes, and the development of transgenic plants with enhanced tolerance to stress. In this report, we describe our recent results on industrial transgenic plants by the gene manipulation of antioxidant enzymes. Transgenic tobacco plants expressing both superoxide dismutase (SOD) and ascorbate peroxidase (APX) in chloroplasts were developed and were evaluated their protection effects against stresses, suggesting that simultaneous overexpression of both SOD and APX in chloroplasts has synergistic effects to overcome the oxidative stress under unfavorable environments. Transgenic tobacco plants expressing a human dehydroascorbate reductase gene in chloroplasts were showed the protection against the oxidative stress in plants. Transgenic cucumber plants expressing high level of SOD in fruits were successfully generated to use the functional cosmetic purpose as a plant bioreactor. In addition, we developed a strong oxidative stress-inducible peroxidase promoter, SWPA2 from sweetpotato (lpomoea batatas). We anticipate that SWPA2 promoter will be biotechnologically useful for the development of transgenic plants with enhanced tolerance to environmental stress and particularly transgenic cell lines engineered to produce key pharmaceutical proteins.

각종 환경스트레스에 의해 생체 내에서 과량으로 생성되는 독성의 활성산소종 (ROS)은 산화스트레스를 유발시켜 식물의 질병, 노화 및 세포사멸을 촉진시킨다. 연구팀은 21세기 당면한 지구규모의 환경, 식량 및 보건문제 해결에 기여할 수 있는 기반기술 (plateform technology)를 개발하기 위하여 식물세포의 항산화기구 규명. 산화스트레스 유도성 항산화효소 유전자 개발. 스트레스 내성식물 개발에 관한 연구를 수행하고 있다. 여기에서는 항산화효소 유전자를 이용한 산업용식물체 개발에 관한 연구팀의 최근 연구결과를 중심으로 소개하였다. SOD와 APX 유전자를 엽록체에 동시에 발현시킨 담배 식물체는 MV, 건조 등 여러 스트레스에 대한 내성을 나타내어, 복합 스트레스내성 농작물개발에 활용이 기대된다 인체 DHAR 유전자를 엽록체에 도입시킨 담배식물체는 정상적으로 DHAR 유전자를 발현시켰으며, MV 등 여러 스트레스에 대한 내성을 나타내었다. 피부 노화방지 등에 관여하여 ROS를 제거하는 SOD를 과실에 과발현시킨 형질전환오이를 성공적으로 개발하여. SOD 오이는 기능성화장품의 용도로 제품개발이 기대된다. 또한 고구마에서 산화스트레스에 특이적으로 발현하는 POD (SWPA2.) promoter를 개발하였다. SWPA2 promoter는 스트레스내성 및 의료용 단백질 등 고부가가치 생리활성물질을 생산할 수 있는 산업용 형질전환 식물체 및 배양세포주 개발에 이용될 수 있을 것으로 기대된다.

Keywords

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