Lilium longiflorum 'Nellie White'의 인편으로부터 Friable 배발생 캘러스를 통한 소자구 분화
Bulblet Differentiation through the formation of Friable Embryogenic Callus from Bulb Scales of Lilium longiflorum 'Nellie White'
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Lilium longiflorum ‘Nellie White’에서 부서지기 쉬운 배발생 캘러스 (FEC)를 유도하여 FEC를 통한 소자구 재분화 체계를 확립하고자 실시하였다. FEC를 통한 나리 소자구 분화는 2.0 mg/L dicamba가 첨가된 MS 기본배지에 나리 인편을 배양하여 단단한 캘러스를 유도하고, 유도된 단단한 캘러스를 동일배지에서 3번 이상 계대배양하여 단단한 일반 캘러스를 증식하였다. 증식된 단단한 캘러스는 1～2 mm 정도의 크기로 절단하여 2.0 mg/L dicamba와 90 g/L sucrose가 첨가된 MS배지에서 배양하여 FEC를 유도하였다. 2개월 간격으로 계대배양하면서 FEC를 유도하였으며, FEC 유도율은 단단한 캘러스를 동일 배지에 계대배양 하였을 때 증가하였다. 유도된 FEC는 1.0～2.0 mg/L dicamba와 90 g/L sucrose가 첨가된 MS배지에서 5배 이상의 증식율을 보였다. 증식된 FEC에서 소자구 분화는 0.1 mg/L BA, 1.0 g/L NAA, 30 g/L maltose가 첨가된 1/2 MS 배지에서 양호하였다. 그러나 많은 재분화된 소자구가 투명화 되었다. 건전한 소자구의 재분화는 30 g/L sucrose와 0.5～1.0% 활성탄이 첨가된 MS 배지가 가장 효과적이었다.
Abstract
A series of experiments were performed to establish regeneration system through friable embryogenic callus (FEC) of Lilium longiflorum Nellie White'. Only hard and regular callus was induced from bulb scales on medium containing 2.0 mg/L dicamba and 30∼90 g/L sucrose. The induced hard callus was subcultured on medium with 2.0 mg/L dicamba and 30 g/L sucrose, and used as a material for induction of FEC. In order to induce FEC, induced hard and regular callus was chopped into 1∼2 mm segments, and re-cultured on medium with 2.0 mg/L dicamba and 90 g/L sucrose. FEC was induced from chopped hard calli by the subcultures of two months interval. The induction rate of FEC was enhanced when hard callus was subcultured on same medium. FEC was proliferated more than 5 times on medium with 1.0∼2.0 mg/L dicamba and 90 g/L sucrose. Bulblet differentiation from FEC was very favorable on MS medium supplemented with 0.1 mg/L BA, 1.0 mg/L NAA and 30 g/L maltose, but many differentiated bulblets were changed to vitrificated ones. The differentiation of normal bulblets was most effective on medium containing 0.5∼1.0% activated charcoal and 30 g/L sucrose.
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