Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Transformation of Artemisia adamsii, Endemic to a Gobi Desert, with CLP, Dhn5 to Enhance Environmental Stress Tolerance

CLP, Dhn5 유전자의 도입에 의한 고비사막 자생식물 Artemisia adamsii의 내건성 및 내동성 증진

  • 한규현 (단국대학교 생명자원과학부) ;
  • 황철호 (단국대학교 생명자원과학부)
  • Published : 2003.12.01
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Abstract

Freezing and drought tolerances in plants are very important for survival in the desert. In an effort to reduce desertifcation in Gobi, a molecular breeding of Artemisia adamsii using the CLP (chitinase like protein, antifreeze protein) and Dhn5 (dehydrin5) genes from barley is performed by introducing them into Artemisia adamsii via Agrobacteria. We had found an optimal combinatorial concentration of hormones at 0.05mg/L of NAA and 0.5mg/L of BA for growth of callus in Artemisia adamsii. In addition, the higher rate of callus induction using hypocotyl as explant was observed comparing to explants of stem and leaf. There were some variations in the level of the proteins expressed among the transgenic lines such that the lines of CLP(CS1-5, 1-7,4-4) and Dhn5(DS2-2, 2-3) lines produce the protein to higher levels. The transgenic lines showing a higher level of Dhn5 exhibited better growth than nontransgenic callus in presence of 10 and 20％ PEG. In case of the CLP tansgenic lines, both CS1-5 and CS1-7 showed a higher level of freezing tolerance determined by ion leakage test.

고비사막 접경지역의 식물인 Artermisia adamsii의 내건성 및 내동성 증진을 위해 조직배양과 CLP및 Dhn5유전자의 형질전환을 수행하였다. 다양한 호르몬 농도 조건에서의 성장을 확인한 결과, 0.05mg/L의 NAA와 0.5mg/L의 BAP조건과 0.1mg/L의 NAA와 0.5mg/L의 BAP가 포함된 배지의 암조건 하에서 최적의 캘러스 생장을 확인하였으며 유전자 도입 및 유전자의 발현이 확인된 캘러스가 세포 수준에서도 내건성 및 내동성이 증진되었음을 확인하였다. 그러나 Atremisia속 다른 식물과 다르게 조직절편에서 직접 기관분화를 유도하거나 캘러스를 통한 식물체 재생에 어려움이 있어 식물체 수준에서 형질전환에 따른 환경스트레스 내성의 증진을 확인하지 못하고 있다. 앞으로 진행될 A. adamsii의 식물체 재생에 대한 연구를 통해 내동성 및 내건성이 증진된 식물체를 육성하여 고비사막 지역적응력을 조사할 예정이다.

Keywords

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