Effective Micropropagation of Pulsatilla cernua var. koreana through Apical Meristem Culture

할미꽃 정단 분열조직 배양을 통한 효율적 미세번식

  • Ko, Jeong-Ae (Faculty of Biological Resources Science, College of Agriculture, Chonbuk National University, Institute of Agricultural Science & Technology, Chonbuk National University) ;
  • Kim, Hyun-Soon (National Institute of Crop Science, Rural Development Administratiion)
  • 고정애 (전북대학교 농업생명과학대학 생물자원과학부, 농업과학기술연구소) ;
  • 김현순 (농촌진흥청 작물과학원)
  • Published : 2008.10.31

Abstract

In order to investigate the effect of plant growth regulators on effective in vitro micropropagation, apical meristems of Pulsatilla cernua var. koreana were cultured on Murashige and Skoog's (MS) medium with 2,4-D, NAA, TDZ and BA. Media containing 2,4-D and kinetin, 2,4-D and TDZ, NAA and TDZ were not effective on callus induction. However, embryogenic or organogenic callus was obtained on media containing NAA and BA. Especially, on MS medium with 0.5mg/L NAA and 1.0mg/L BA was optimal for a high frequency (62%) of shoot or shoot bud obtained from callus. Callus proliferation, shoot multiplication and elongation were significantly increased by adding 10% coconut water on MS media with 0.5mg/L NAA and 1.0mg/L BA. Repeated subculturing of in vitro grown shoots resulted in propagation rate of 12.9 shoots per explant every 30 days. Root formation from the adventitious shoots was not easily achieved. However, roots were only produced through callus on MS medium with 2.0mg/L NAA alone or 0.5mg/L NAA and 1.0mg/L BA. These roots were used materials for callus and shoot production repetitively.

할미꽃의 정단 분열조직배양에 의한 기내 효율적 미세번식에 미치는 식물생장조절물질의 효과를 조사하기 위해 2,4-D, NAA, kinetin, TDZ와 BA를 혼용처리한 MS배지에 정단분열조직을 배양하였다. 배지내 2,4-D와 kinetin, 2,4-D와 TDZ, NAA와 TDZ 혼용처리는 캘러스 유도에 효과적이지 못하였으나 NAA와 BA가 혼용 처리되었을 때 배발생적 또는 기관분화성 캘러스가 유도되었다. 특히 0.5mg/L NAA와 1.0mg/L BA 혼용처리된 MS 배지에서는 캘러스로부터 고빈도로(62%) 신초가 형성되어 캘러스 유도 및 신초형성에 적합하였다. 적합배지에 10% coconut water를 첨가하여 30일마다 계대배양 하므로 캘러스 증식률, 신초 분화율 및 신초 신장이 현저히 증가되었는데, 그 결과 절편체 당 평균 12.9개의 shoot bud를 분리할 수 있었다. 할미꽃 기내 유도된 식물체에서 뿌리는 쉽게 분화되지 못하였으나 9.0mg/L NAA 단용 또는 0.5mg/L NAA와 1.0mg/L BA 혼용처리된 MS배지에서 캘러스를 통해서만 분화되었다. 이들 뿌리는 동일 배지에서 캘러스유도 및 식물체 분화를 반복적으로 실시하는 시원체가 되기도 하였다.

Keywords

References

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