Somatic Embryogenesis and Plant Regeneration in Immature Flower Bud Cultures of Carnation

카네이션의 미숙화뢰 배양을 통한 체세포배 발생 및 식물체 재분화

  • 안병준 (단국대학교 농과대학 식물자원학부)
  • Published : 1997.11.01

Abstract

Immature flower buds of 'Desio' carnation were cultured on MS agar medium supplemented with 1 ㎎/L 2,L-D. Embryogenic calli were formed from 5-10% of the buds less than 20 ㎜ in length, but only non-embryogenic calli were produced from explants of shoot apex leaf, internode, and flowere buds larger than 20 ㎜. The same method was applied to 16 cultivars of cut Sower carnation and embryogenic calli were obtained in 7 cultivars. Several embryogenic callus lines were selected and maintained through subcultures over 120 weeks without loss of embryogenic competence. The embryogenic cultures were also proliferated rapidly in liquid agitation cultures using MS medium supplemented with 1mg/L 2,4-D. Numerous embryos were formed on the periphery of the cell aggregates upon transfer to auxin-free MS agar medium. Plantlets were transplanted in potting soil and grown to bloom in six months.

카네이션의 종묘 급속증식 기술 및 형질전환 연구의 기초 연구로서 체세포배발생 조직배양 방법을 개발하고자 수행되었다. 'Desio' 카네이션의 20 mm 이하의 미숙화뢰를 2,4-D가 1 ㎎/L 함유된 MS 기본배지에서 배양하면 배발생 캘러스가 5-l0%의 효율로 유도되었으나, 줄기 정단분열조직, 잎, 절간조직과 20 ㎜ 이상의 화뢰에서는 비배발생 캘러스만이 형성되었다. 동일한 배양방법을 16품종의 절화용 카네이션에 적용한 결과, 7품종에서 배발생 캘러스를 유도할 수 있었다. 일부 배발생 캘러스 세포주는 120주 이상 배발생능 상실 없이 계대배양을 통해 증식할 수 있었으며, 액체 진탕 배양을 통해 배발생 세포괴 상태로 급속 증식하는 배양체가 획득되었다. 배발생 캘러스 또는 액체배양 배발생 세포괴를 호르몬이 포함되지 않은 MS 한천배지에 이식하며 2-3주내에 체세포배 발생을 통하여 식물체가 재분화되었다. 토양이식된 식물체는 정상적으로 생장하여 20주 후 개화하였다.

Keywords

References

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