Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effects of Growth Regulators and Culture Environment on ex vitro Rooting and Acclimatization of Apple Rootstock in vitro Propagated

기내배양 사과 대목의 기외 삽목 시 발근과 순화에 미치는 배양조건 및 생장조절물질의 효과

  • Published : 2004.06.01
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Abstract

Growth of M.9 (Malus domestica Bark. cv) and M.26 (Malus domestica Bark. cv) of dwarf apple rootstock, cultured on MS agar medium in a vessel with ventilating stopper (VS) and then in vivo rooting and acclimatization under combined-treatment by some materials with IBA, were investigated. Concentration of $CO_2$ and ethylene in the vessel with VS was lower then in the vessel with non-VS. Change of temperature and humidity in the vessel with VS was repeated by light condition. Stomatal pares of tissue in the vessel with VS were immediately closed after plantlets were exposed to room humidity but those in the vessel with non-VS were opened after 20 minutes exposure to room humidity. Leaf area and chloroplast index of tissue in the vessel with VS was higher then in the vessel with non-VS. In vivo rooting ratio and acclimatization ratio of M.9 and M.26 was highest in 300mg/L IBA＋3％ sucrose dip-treatment among other combined- treatments.

본 연구는 사과 왜성대목 M.9와 M.26 조직 배양묘를 통기성 마개와 비통기성 마개의 MS배지에서 생장 특성을 비교하기 위해 시험되었다. 또한 배양묘의 생육 변화와 이 배양묘를 발근촉진제 침지 처리 후 기외 삽목을 하여 발근 및 순화를 동시에 시키기 위해 실시하였다. 배양병내의 $CO_2$와 에틸렌의 농도는 통기성 마개 배양병이 비통기성마개 배양병 보다 낮았다. 통기성 마개 배양병내의 온$.$습도 변화는 광조건에 따라 일정하게 반복되었다. 통기성 마개 배양묘의 기공은 외기에서 즉시 관찰 시 닫혀 있었으나 비통기성마개 배양묘의 기공은 외기에서 20분 후 관찰 시에도 열려 있었다. 통기성 마개 배양묘의 엽록체 지수와 잎 면적은 모두 비통기성 마개의 것 보다 높았다. 기외 삽목시 발근율은 M.9와 M.26 모두 300 mg/L IBA＋ 3% sucrose 침지 처리 구에서 각각 86.5%와 85.4%로 가장 높았으며 순화율은 각각 71.7%와 70.0%로 가장 높았다. 통기성 마개 배양묘의 순화율은 비통기성마개 배양묘 보다 모든 침지 처리구에서 순화율이 비슷하거나 높았다.

Keywords

References

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