생물반응기 배양을 통한 두릅나무 (Aralia elata)의 체세포배 및 유식물체 대량증식
Mass Propagation of Somatic Embryos and Plantlets of Aralia elata through Bioreactor Culture
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초록
두릅나무의 엽병을 1.0 mg/L 2,4-D가 포함된 MS 고체배지에서 배발생캘러스를 유도하였다. 배발생세포와 배발생세포괴는 1.0 mg/L 2.4-D가 포함된 MS 액체배지에서 배발생캘러스를 2주간 현탁배양하여 대량으로 얻었다. 그물망을 통과한 배발생세포는 1.0 mg/L 2.4-D가 포함된 MS 액체배지에서 배양하면 배발생능이 소실되지 않고 지속적으로 유지 및 증식시킬 수 있었다. 그물망을 통과하지 못한 배발생세포괴를 식물생장조절물질이 첨가되지 않은 1/2 MS 액체배지에 옮겨 2주간 배양하면 구상형의 체세포배로 발달하였다. 구상형의 체세포배는 5 L의 bioreactor를 이용하여 배양하면 심장형, 어뢰형, 자엽형의 배와 유식물체로 발달하였다. Bioreactor 배양을 통해 두릅나무의 체세포배를 효과적으로 대량증식 시킬 수 있었다.
Abstract
Embryogenic calli were induced from petioles of Aralia elata on MS solid medium supplemented with 1.0 mg/L 2,4-D. When embryogenic calli were transferred to MS liquid medium supplemented with 1.0 mg/L 2,4-D, embryogenic cells and embryogenic cell clusters were developed after 2 weeks of culture. Embryogenic cells were filtered through a 250 ㎛ sieve and the passed cells were proliferated and maintained in MS liquid medium supplemented with 1.0 mg/L 2,4-D. Embryogenic cell clusters entrapped on the sieve were transferred to 1/2 MS liquid medium without plant growth regulators, globular-shaped embryos were developed from embryogenic cell clusters after 2 weeks of culture. Numerous early stage somatic embryos could be developed to heart-shaped, torpedo-shaped, cotyledonary embryos and plantlets in 5 L bioreactor. Above results suggest that effective somatic embryo proliferation can be achieved via bioreactor culture systems in Aralia elata.
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