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Effects of glutamine and AgNO3 on plant regeneration of Sedum sarmentosum

돌나물의 식물체 분화에 미치는 Glutamine과 AgNO3의 영향

  • 안정호 (충남농업기술원) ;
  • 김현순 (농촌진흥청 국제기술협력과) ;
  • 이승엽 (원광대학교 생명자원과학연구소)
  • Published : 2009.03.31

Abstract

This work was conducted to establish an efficient plant regeneration system for genetic transformation and the in vitro conservation of Sedum sarmentosum genetic resources. Effects of glutamine and $AgNO_3$ on plant regeneration between two genotypes were investigated using MS media supplemented with 0.2 mg/L NM and 3.0 mg/L BA. Calluses were formed on leaf explants placed on MS solid media supplemented with 3 mg/L 2,4-D and 1 mg/L BA. Calluses of Keumsan local strain produced shoots at a frequency of up to 100% after 50 days of culture on medium supplemented with glutamine. The highest number of shoots per callus was 17.6 at 350 mg/L glutamine. However, calluses of Wanju local strain gave rise to no shoots under the same culture conditions. Likewise, calluses of Keumsan local strain produced shoots at a frequency of up to 100% after 50 days of culture on medium supplemented with $AgNO_3$ whereas Wanju local strain sporadically produced shoots. The highest number of shoots per callus of Keumsan local stain was 16.1 at $15{\mu}M$ $AgNO_3$. Regenerated shoots were subcultured on hormone-free MS medium for rooting and shoot growth, and then 3-5 cm high plantlets were transplanted to the artificial soils comprising vermiculite and perlite, where they survived at a frequency of 88-100%. After being transplanted into upland soil:sand (1:1, v/v) in a greenhouse, regenerated plants showed a morphologically normal growth.

돌나물 (Sedum sarmentosum)의 형질전환 및 유전자원 기내보존을 위한 효율적인 식물체 분화 체계를 확립하기 위하여, 잎절편 유래의 켈러스로부터 식물체 분화에 미치는 glutamine과 $AgNO_3$의 영향과 분화 식물체의 순화 후 생존율을 조사하였다. 캘러스 유도는 3 mg/L 2,4-D와 1 mg/L BA, 식물체 분화는 0.2 mg/L NAA와 3.0 mg/L BA를 각각 첨가한 MS배지를 사용하였다. 금산 수집종에서 glutamine 첨가는 50일째에 100%의 식물체 분화를 보였으며, 350mg/L glutamine 첨가시 켈러스당 17.6개의 가장 많은 식물체가 분화되었다. $AgNO_3$ 첨가배지에서도 금산 수집종은 100% 식물체 분화를 보였으며, $15{\mu}M$ 첨가배지에서 캘러스당 16.1개의 식물체가 분화되어 가장 양호하였다. 완주 수집종은 glutamine 첨가에 관계없이 식물체가 전혀 분화되지 않았고, $5-15{\mu}M$ $AgNO_3$ 첨가배지에서만 소수의 식물체가 분화되었다. 분화 식물체는 생장조절제를 첨가하지 않은 MS 배지로 옮겨 shoot생장과 발근을 유도한 다음, vermiculite와 perlite를 혼합한 인공토양에서 순화시킨 결과 88-100%의 생존율을 보였다. 생존 식물체들은 강모래:밭흙 (1:1, v/v)을 혼합한 토양에 정식한 후에도 양호한 생장을 보였으며, 모식물과 형태적으로 차이가 없었다.

Keywords

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