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Influence of Medium and Plant Growth Regulator on Micropropagation Efficiency in Blueberry

블루베리의 미세번식에서 배지와 식물생장조절제의 영향

  • Kim, Hwa Young (Dept. of Plant Science, College of Life Sciences, Gangneung-Wonju National University) ;
  • Kang, Sun Pil (Dept. of Plant Science, College of Life Sciences, Gangneung-Wonju National University) ;
  • Hong, Sae Jin (Dept. of Plant Science, College of Life Sciences, Gangneung-Wonju National University) ;
  • Eum, Hyang Lan (NICME Pyeongchang branch institute, Green Bio Science & Technology, Seoul National University)
  • 김화영 (강릉원주대학교 식물생명과학과) ;
  • 강순필 (강릉원주대학교 식물생명과학과) ;
  • 홍세진 (강릉원주대학교 식물생명과학과) ;
  • 엄향란 (서울대학교 그린바이오과학기술연구원 나이셈 평창분원)
  • Received : 2015.06.17
  • Accepted : 2015.08.11
  • Published : 2015.09.30

Abstract

The aim of this study was to develop an effective production system of blueberry plants by using tissue culture technique. Murashige and skoog medium (MS) and woody plant medium (WPM) were compared for shoot formation of highbush blueberries. Also medium supplemented with zeatin/2-isopentenyl adenine (2iP)/benzyl aminopurine (BA) (1, 2/10, 15/4, $6mg{\cdot}L^{-1}$)and zeatin/2iP/BA (0.5/10, 15/$0.05mg{\cdot}L^{-1}$) as plant growth regulators to determine the effect of shoot formation and shoot proliferation, respectively. The shoot explants cultured on WPM showed higher shoot formation rates, more number of nodes, and longer root length than those on MS medium during the primary culture. Shoots were not formed when the explants were cultured on the medium without plant growth regulators or on only BA. The shoot explants cultured on the medium supplemented with 2iP showed low rates of shoot formation. On the other hand, zeatin was the most effective for shoot formation and growth of the explants. Also influence of different cytokinins (zeatin, 2iP) on the shoot proliferation of subcultured shoot explants was studied. There was no significant difference among the different concentrations of zeatin in the rate of shoot formation and number of shoots. However at higher concentration of zeatin, number of nodes was increased, and shoot length was shorted. The proper concentrations of zeatin for shoot propagation in subculture were found to be $0.5mg{\cdot}L^{-1}$ and $1mg{\cdot}L^{-1}$.

본 연구는 조직배양을 이용한 효율적인 블루베리의 묘생산 체계 개발을 위하여 수행되었다. 신초형성을 위한 초대배양을 위해서는 WPM 배지가 MS 배지보다 신초형성률, 마디수, 신초장 등에 있어서 유의적으로 우수하였다. 식물생장 조절제가 신초형성에 미치는 식물생장조절제의 영향을 조사하기 위해서는 zeatin(1, $2mg{\cdot}L^{-1}$), 2iP(10, $15mg{\cdot}L^{-1}$), 그리고 BA(4, $6mg{\cdot}L^{-1}$)를 처리하였으며, 신초의 증식에 미치는 영향을 확인하기 위해서는 zeatin($0.5mg{\cdot}L^{-1}$), 2iP(10, $15mg{\cdot}L^{-1}$), 그리고 BA($0.05mg{\cdot}L^{-1}$)를 처리하였다. 신초형성에 미치는 결과는 zeatin 처리가 신초형성률, 마디수, 신초장 등에서 유의적으로 효과적이었다. 반면 무처리와 BA 처리에서는 신초가 형성되지 않았으며, 2iP 처리의 경우 신초형성률이 낮았다. 기내 삽목으로 생산된 블루베리 신초의 계대배양에 있어 신초 발생 및 생장에 미치는 영향은 zeatin을 농도별로 처리한 결과, 모든 농도에서 신초의 형성률과 형성된 신초의 개수는 유의적 차이를 보이지 않은 반면 zeatin의 농도가 증가할수록 신초의 마디수는 증가하나 신초장은 짧아지는 경향을 보였다. 신초증식을 위한 적정한 zeatin 농도는 $0.5mg{\cdot}L^{-1}$ 였다.

Keywords

References

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