Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of Salt Strength, Sucrose Concentration and NH4/NO3 Ratio of Medium on the Shoot Growth of Wasabia japonica in Vitro Culture

고추냉이 신초의 생육에 미치는 배지의 Salt Strength, Sucrose 농도 및 NH4/NO3 비율의 영향

  • 박윤영 (대구대학교 생명환경대학 생명환경학부) ;
  • 조문수 (대구대학교 생명환경대학 생명환경학부) ;
  • 정종배 (대구대학교 생명환경대학 생명환경학부)
  • Published : 2007.09.29
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Abstract

To establish a optimum culture condition in vitro for production of seedlings in Wasabia japonica, the effects of salt strength, sucrose concentration, and $NH_4/NO_3$ ratio on the shoot growth in MS medium were investigated. The full strength of MS medium was the best condition for shoot growth, and in $1/4{\sim}1/2x$ or 2x MS medium the growth was significantly suppressed. Growth of shoots was enhanced when sucrose was added in MS medium after 2 weeks of culture, and the best result was found at 3% sucrose addition. ${NH_4}^+/{NO_3}^-$ ratio of 10:50 gave the highest biomass of shoot in the liquid culture with MS medium, and increasing the ${NH_4}^+$ ratio in the medium significantly reduced the growth of shoot.

식물 세포나 조직의 배양에서 배지의 salt strength, sucrose 농도, 질소 함량과 질소원의 종류 및 그 비율 등이 세포 또는 조직의 생장에 영향을 미친다. 본 연구에서는 Agar를 함유한 MS 기본배지와 BA 1 mg/L를 첨가한 MS 기본 액체배지에서 계대배양을 통하여 생산한 다신초를 액아와 본엽이 $2{\sim}3$매 되도록 분할한 신초를 이용하여 MS 액체배지의 salt strength와 sucrose 농도 및 $NH_4/NO_3$ 비율이 고추냉이 신초의 생육에 미치는 영향을 조사하여 고추냉이 유묘의 생산에 필요한 최적 배지조건을 구명하였다. 고추냉이 신초의 증식에는 MS 액체배지의 salt strength는 기본조성이 가장 적합한 것으로 나타났으며, $1/4{\sim}1/2x$ 또는 2x MS 배지에서는 고추냉이 유묘의 생장이 크게 억제 되었다. 기본조성의 MS 액체배지에 sucrose 3%를 첨가하였을 때 고추냉이 신초의 생장이 가장 우수한 것으로 나타났으나 sucrose 농도 $1{\sim}6%$ 범위에서 신초의 수와 길이는 유의성 있는 차이를 보이지 않았다. 기본조성의 MS 액체배지에서 질소원으로 ${NH_4}^+$과 ${NO_3}^-$의 비율을 10:50으로 조절하였을 때 고추냉이 신초의 생장이 가장 우수한 것으로 나타났으며, ${NH_4}^+$의 비율이 증가할수록 생장은 억제되었다.

Keywords

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