Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Micropropagation of Juvenile and Mature Tree of Corylopsis coreana by Axillary Bud Culture

액아배양에 의한 유묘 및 성숙 히어리나무의 기내번식

  • Published : 2002.06.01
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Abstract

We have developed an in vitro micropropagation system via shoot formation from axillary buds using nodal segments of Corylopsis coreana. Explants from both juvenile tree (one-year-old greenhouse stock seedlings) and mature tree (ten-years-old tree in nursery) were compared with regard to propagation efficiency. Combined treatment of both BA and zeatin were effective on shoot proliferation since the best result was obtained on MS medium supplemented with 0.5∼3.0 mg/L zeatin and 0.2 mg/L BA. Generally, juvenile explants were better in both shoot proliferation and growth than mature explants. However, as the duration of in vitro culture was proceed to 6 months, explants from mature tree also produced three shoots per explant. Distinctive differences in rooting and adaptability to soil of shoots obtained from mother trees. Whereas shoots originated from juvenile explants rooted as high as 97%, those from adult explants showed 62% rooting. Similar result was also observed in soil acclimatization. The plantlets derived from juvenile plants survived 67%, while only 48% of those from adult trees survived. The results showed a possibility of the micropropagation of Corylopsis coreana through shoot formation from axillary buds. In addition, the advance of the research still remain to enhance the frequency of acclimatization of plantlets from mature trees for practical application.

히어리나무 1년생 및 10년생을 재료로 액아배양을 통한 기내번식을 시험하였다. 줄기의 증식은 zeatin과 BA의 공조처리가 효과적이었으며 MS배지에 zeatin 0.5∼3.0 mg/L, 0.2 mg/L BA 처리시 주효하였다. 1년생이 10년생보다 전반적으로 증식 및 생장이 양호하였으며, 배양 6개월 후에는 10년생에서도 매월 절편 당 3개의 줄기유도가 가능하였다. 기내 줄기의 발근은 1년생은 97%, 10년생은 62%를 나타내었고, 토양이식시 1 년생 유래 배양묘는 67%, 10년생은 48%생존되어 모수령에 따른 차이를 나타냈다. 본 실험결과 히어리나무의 액아배양으로 유시, 성숙목의 대량번식이 가능함을 보여주었으나 선발개체의 효율적인 기내번식을 위해서는 재유령화의 기술개발과 토양순화율을 증진시켜야 하는 것으로 나타났다.

Keywords

References

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