Plant Growth Retardants Can Inhibit Stem Elongation and Improve Flowering Rate in Lilium concolor var. parthneion and L. dauricum

하늘나리와 날개하늘나리의 줄기 신장 억제와 개화율 향상을 위한 생장억제제의 이용

  • Received : 2009.10.22
  • Accepted : 2010.02.05
  • Published : 2010.03.31

Abstract

To develop Korean native lilies as mini-potted plants, the effects of plant growth retardants on inhibiting stem elongation and improving flowering rate were evaluated. Bulblets of Lilium concolor var. parthneion (5-7 g) and L. dauricum (3-4 g fresh wt) derived from in vitro culture and then enlarged by field culture were applied with 0, 25, 50, or $100mg{\cdot}L^{-1}$ ancymidol, diniconazole, and uniconazole through bulb dipping, foliar spray, and drench. In L. concolor var. parthneion, uniconazole dipping most effectively reduced plant height by 60.7-78.3% depending on concentration compared with control without decreasing flowering percentage. In L. dauricum, dipping into diniconazole solution significantly retarded the plant height by 70.0-86.3% and improved flowering percentage by 8.3-18.2% compared to control of 0%. Drench of $25-50mg{\cdot}L^{-1}$ ancymidol was also effective on inhibition of stem elongation and improvement of flowering rate. Therefore, dipping into $50-100mg{\cdot}L^{-1}$ uniconazole solution in L. concolor var. parthneion and dipping into $25mg{\cdot}L^{-1}$ diniconazole solutions or drench of $25mg{\cdot}L^{-1}$ ancymidol in L. dauricum can be useful to produce the mini-potted plants.

우리나라에 자생하는 하늘나리(Lilium concolor var. parthneion)와 날개하늘나리(L. dauricum)를 소형 분화로 개발하기 위해 생장억제제의 줄기 신장 억제 및 개화촉진 효과를 구명하였다. 조직배양으로 얻어 포장에서 1차 비대시킨 후 생체중이 각각 5-7g과 3-4g인 인경을 각각 0, 25, 50과 $100mg{\cdot}L^{-1}$의 ancymidol, diniconazole과 uniconazole 수용액으로 침지, 분무 또는 관주처리 하였다. 하늘나리에 있어서는 uniconazole 침지처리가 초장을 가장 크게 감소시켰는데, 그 농도에 따라 10.2-18.5cm로 대조구에 비해 60.7-78.3% 억제되었으며, 개화율은 농도에 관계없이 100%였다. 날개하늘나리의 경우, diniconazole 침지처리에서 줄기 신장의 억제 효과가 가장 커서, 초장은 농도에 따라 3.2-7.0cm로 대조구에 비해 70.0-86.3%나 억제되었으며, 개화율은 대조구의 0%에서 8.3-18.2%로 향상되었다. 그리고 ancymidol $25-50mg{\cdot}L^{-1}$의 관주처리도 날개하늘나리의 줄기 신장억제와 개화 촉진에 효과적이었다. 따라서 하늘나리와 날개하늘나리의 인경을 이용한 소형 분화 생산에는 각각 uniconazole $50-100mg{\cdot}L^{-1}$ 침지, 그리고 diniconazole $25mg{\cdot}L^{-1}$ 침지 또는 ancymidol $25mg{\cdot}L^{-1}$ 관주처리가 적합하다고 판단된다. 단, 본 연구에 사용된 날개하늘나리의 인경은 크기가 너무 작아 분화로서 상품성이 없었기 때문에 좀더 큰 구근을 사용한 연구가 필요하다.

Keywords

References

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