Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of Casein on Somatic Embryogenesis and Plant Regeneration in Shoot Apical Meristem Explants of Sweetpotato (Ipomoea batatas L.)

고구마 정단분열조직으로부터 체세포배발생 및 식물체 재분화에 미치는 casein의 영향

  • 신공식 (농촌진흥청 농업생명공학연구원) ;
  • 노경희 (농촌진흥청 농업생명공학연구원) ;
  • 이연희 (농촌진흥청 농업생명공학연구원) ;
  • 박용환 (농촌진흥청 농업생명공학연구원) ;
  • 서석철 (농촌진흥청 농업생명공학연구원)
  • Published : 2004.03.01
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Abstract

An efficient protocol has been developed for rapid mass propagation of sweetpotato from shoot-tips derived embryogenic callus. Optimal embryogenic callus was induced from shoot apical meristem explants on Murashige and Skoog (MS) medium supplemented with 1mg/L 2,4-D. The addition of casein hydrolysate in the media increased the embryogenesis efficiency of sweetpotato. Somatic embryos were easily induced from the embryogenic callus on MS basal medium containing 300-500mg/L casein hydrolysate without phytohormon. Treatment of casein hydrolysate (100∼300mg/L) with 1mg/L 2,4-D also improved the secondary embryonic efficiency from somatic embryos below 2mm in length. Plant regeneration was achieved via somatic embryogenesis and direct organogenesis. Regenerated planlets with well developed shoots and roots on MS basal medium were successfully transferred to soil.

고구마의 정단배양에 의한 배발생 캘러스로부터 대량증식 체계가 개발되어져 왔다. 고구마 정단분열조직은 1mg/L 2,4-D가 첨가된 MS배지에서 배양 4주 경에 최적의 배발생 캘러스가 형성되었다. 또한 2,4-D가 첨가된 배지에 casein을 첨가함으로써 고구마 신천미 품종의 배발생 효율을 최고 90%이상으로 2.4-D단독처리보다 현저하게 증가시켰다. 배발생 캘러스로부터 체세포배의 유도는 식물생장조절제가 제거된 MS 기본배지에서 효과적으로 형성되었으며 300∼500mg/L casein을 첨가한 배지에서는 더 높은 형성 빈도와 녹색의 단단한 체세포배가 발달하였다. 한편, 2mm이하의 체세포배로부터 이차 배발생 캘러스 형성 및 체세포배의 발달이 100∼300mg/L casein의 첨가에 의해 증가하였다 배발생 캘러스에서 얻어진 체세포배는 직접 MS기본배지에서 쉽게 각 기관이 형성되었으며, 발근과 shoot를 발달시켜 정상적인 식물체로 하여 토양에 성공적으로 옮겨 심을 수 있었다.

Keywords

References

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