Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
권호 표지

Micropropagation Using Shoot Tip Culture of Pyrus ussuriensis Maximowicz

정아배양에 의한 산돌배나무의 기내번식

  • 문흥규 (국립산림과학원 생물공학과) ;
  • 이성재 (강원도 산림개발연구원)
  • Received : 2008.07.14
  • Accepted : 2008.09.01
  • Published : 2008.09.29
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Abstract

In order to develop an efficient micropropagation technique effect of plant growth regulators (PGRs) affecting on shoot proliferation from shoot apex in Pyrus ussuriensis was tested. Generally, there was no conspicuous effect on shoot induction by the treatment of PGRs and one or two shoots/explant were induced when cultured on MS medium supplemented with BA and/or BA plus NAA. Both apical shoot necrosis and hyperhydric shoots were observed frequently in multiplied shoots, and callus was formed at the basal part of shoots. About 20% spontaneous rooting was achieved in growing shoots, however the proliferated shoots exhibited poor rooting rate in gelrite supported media. When we tried to ex vitro rooting of the shoot cutting, the shoot cuttings rooted up to 50% with 100 mg/L IBA application. The rooted plantlets grew normally after acclimatization in the greenhouse.

산돌배나무의 기내번식 기술을 개발하고자 유묘의 정아를 재료로하여 기내 식물체 증식에 미치는 생장조절제의 효과를 시험하였다. 정아를 MS 배지에 BA 단독처리 혹은 BA+NAA 혼용처리 결과 대부분 줄기는 1-2개로 유도 되었으며 처리에 따른 차이는 나타나지 않았다. 줄기의 생장과정에서 정아괴저가 흔히 관찰되었으며 다경이 유도되는 줄기에서는 과수화 현상이 나타났고 줄기의 기부에는 캘러스가 형성되었다. 줄기의 증식 과정에서 BA+NAA 처리구에서 약 20%의 자발적인 발근이 이루어 졌다. 다경으로부터 얻어진 줄기는 gelrite 경화배지에서 기내발근이 저조하였으며, 기외삽목시 100 mg/L IBA 처리로 50%까지 발근되었다. 발근묘는 순화 후 정상적으로 생장하였다.

Keywords

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