Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of BA Concentrations and Culture Methods on in Vitro Plant Multiplication from Shoot-Tip Culture of Wasabia japonica

고추냉이 정단배양에 있어서 BA 농도 및 배양방법에 따른 기내증식 효과

  • 박윤영 (대구대학교 생명환경대학) ;
  • 조문수 (대구대학교 생명환경대학) ;
  • 이영득 (대구대학교 생명환경대학) ;
  • 정종배 (대구대학교 생명환경대학) ;
  • 박신 (대구대학교 생명환경대학) ;
  • 정병룡 (대구대학교 생명환경대학) ;
  • 박상규 (대구대학교 생명환경대학)
  • Published : 2007.03.31
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Abstract

Effect of BA concentrations and culture methods on in vitro plant multiplication from shoot-tip cultures of Wasabia japonica was studied. Shoot-tips with leaf primordia and apical meristem were cultured on MS basal medium for all the experiments. Liquid medium for 2 weeks followed by semi-solid medium for 4 weeks containing 1.0 mg/L BA was the best to number of shoots (22.8) and shoot length (3.5 cm). Shoots proliferated could be divided into ca. 5 to 11 of cultures for the multiplication of plantlets. Divided plantlets showed root formation (90%) well onto MS basal medium without growth regulators like IBA and NAA. After rooting, all the plantlets transferred into the pots containing composed soil (bio-media Co., peatmoss $8{\sim}10%$, coir dust $66{\sim}70%$, zeolite $13{\sim}17%$, vermiculite $3{\sim}7%$, perlite $2{\sim}4%$) and grown well into whole plants with multiple shoots.

고추냉이 (Wasabia japonica) 종자로부터 기내 무균상태 하에서 발아된 유묘에서 절취한 shoot-tip을 이용하여 대량증식 방법을 구명하기 위해 MS 기본배지에 BA 농도 및 반고체배지, filter paper bridge, 액체진탕배양 등의 배양방법을 달리하여 multi-shoot을 유도하였다. 1.0 mg/L BA가 들어있는 액체진탕배양에서 2주 동안 배양한 후 반고체배지에서 4주 동안 배양한 방법이 신초 수가 22.8개 그리고 신초의 길이가 3.5cm로 가장 양호한 결과를 보였으며 한 개의 shoot-tip으로부터 약 $5{\sim}11$개의 분할묘를 얻을 수 있었다. 또한 부정근을 유도하고자 여러 가지 농도의 IBA 및 NAA가 함유된 반고체배지에서 9주간 배양한 결과 배양 4주 이후부터 부정근이 출현하기 시작하였다. IBA (0.01 mg/L)가 NAA처리 보다는 부정근 형성에 효과가 있었으나 위의 두 생장조절물질이 전혀 첨가되지 않은 배지가 90.0%의 부정근 형성율을 보이면서 가장 양호한 것으로 나타났다. 잎과 뿌리가 잘 발달된 재분화묘를 원예용상토 (bio-media Co., peatmoss $8{\sim}10%$, coir dust $66{\sim}70%$, zeolite $13{\sim}17%$, vermiculite $3{\sim}7%$, perlite $2{\sim}4%$)에 넣어 2주간 습도를 높게 유지시킨 후 육묘온실에서 순화시킨 결과 모든 개체가 정상적인 형태로 성장하였다.

Keywords

References

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