Korean Journal of Plant Tissue Culture (식물조직배양학회지)

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of a Heavy-lon Beam Irradiation on Anthers, Calli and Seeds of Tobacco (Nicotiana tabacum L. cv. BY-4)

중이온 Beam 조사가 담배 (Nicotiana tabacum L. cv. BY-4)의 약과 캘러스 및 종자에 미치는 영향

  • 배창휴 (순천대학교 농업과학연구소) ;
  • ;
  • 김동철 (순천대학교 농업생명과학대학) ;
  • 이영일 (한국원자력연구소) ;
  • 정재성 (순천대학교 자연과학대학) ;
  • 민경수 (전남대학교 농과대학) ;
  • 이효연 (순천대학교 농업생명과학대학)
  • Published : 2000.03.01
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Abstract

Effects of the heavy-ion ($^{14}$ N or $^{20}$ Ne) beam irradiation on the response of anthers, growth of calli, germination of seeds, and the early growth after the germination of tobacco (Nicotiana tabacum L. cv. BY-4) were investigated. Anthers precultured for 10 days before the irradiation became brown without callus or shoot induction over 20 Gy of $^{14}$ N and $^{20}$ Ne ion beam irradiation. Relative growth rate of the cultured calli was reduced by the irradiation and became brown significantly 2 weeks after the $^{14}$ N and $^{20}$ Ne ion beam irradiation over 50 Gy. The increased intensity of the heavy-ion ($^{14}$ N, $^{20}$ Ne) beam irradiation resulted in the delay of seed germination and the inhibition of the early growth both in water-treated and non-treated seeds before the irradiation. In addition, the heavy-ion beam irradiation to the imbibed seeds inhibited seed germination more than that to the non-imbibed seeds. The screening approach of non-imbibed seeds with heavy-ion beam irradiation using in vitro culture system was more useful than the filter-paper germination method in investigating the characteristics of heavy-ion beam-irradiated seed population and the screening of morphological variants at the early stage of the plant growth.

배양 중인 담배의 약과 캘러스, 그리고 종자에 중이온 ($^{14}$ N 또는 $^{20}$ Ne) beam을 조사하여 중이온 beam 조사가 약의 반응, 캘러스의 생장, 종자의 발아와 초기 생장에 미치는 영향을 조사하였다. 중이온 beam을 조사하기 전 10일간 preculture한 다음 beam을 조사한 약은 $^{14}$ N, $^{20}$ Ne 모두 20Gy 이상의 선량에서 캘러스 또는 신초유도가 없이 고사하였다. 배양 중인 캘러스는 $^{14}$ N 와 $^{20}$ Ne 이온 beam의 조사로 상대생장율이 감소하였고, 중이온 beam 조사 2주 후부터는 50 Gy 이상 선량 처리구에서 심하게 갈변하였다. 종자에 미치는 중이온 beam 조사의 영향으로 수분을 처리한 후 또는 수분 처리 없이 beam을 조사한 종자 모두에서 선종에 관계없이 선량이 증가함에 따라 발아를 지연시키며 유묘의 초기 생장을 억제하였다. 또한 수분을 흡수시킨 후 중이온 beam을 조사한 경우가 수분을 흡수시키지 않고 beam을 조사한 경우 보다 종자의 발아를 심하게 억제시켰다. 건조 상태의 종자에 중이온 beam을 조사한 경우 피조사체들의 특성과 생장의 초기단계에서 형태적 변이체를 검토하는데는 여과지를 이용한 방법보다 기내에서 배양하는 방법이 보다 효과적이었다.

Keywords

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