Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Development of Somatic Embryos from Stem Segments and Anthers in Kalanchoe daigremontiana

칼란코에의 줄기 切片 및 葯 培養으로부터 體細胞胚의 發生

  • Published : 1997.03.01
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Abstract

In order to induce somatic embryogenesis from the stem explants and anther of Kalanchoe daigremontiana, the explants were cultured on MS medium supplemented with auxin (2,4-D, IAA, NAA) and/or cytokinin (BAP) for 8 weeks. Callus from explants was induced most efficiently on MS medium containing. 2.0mg/L NAA and 0.2mg/L BAP. Somatic embryogenesis in stem callus was formed by transfering embryogenic callus from induction media containing growth regulators to medium without growth regulators and then to the medium containing auxin and cytokinin (0.1 mg/L IAA and 1.0mg/L BAP). Callus formation occurred actively in the anthers at early uninucleate stage, and by low temperature pretreatment at $4^{\circ}C$ for 3days. Somatic embryogenesis from the anther callus was induced on MS medium containing 1.0mg/L NAA and 1.0mg/L BAP, 2.0mg/L NAA and 0.2mg/L BAP. The tetraploid of 5.4% was obtained among plants regenerated from anthers.

본 실험(實驗)은 칼란코에 (Kalanchoe daigremontiana Hamet et Perr.)의 줄기 절편(切片)과 약(葯)을 배양(培養)하여 체세포배(體細胞胚)를 양도(諒導)함에 있어서 여러 식물생장조절물질(植物生長調節物質) 특히. 2,4-D의 효과(效果)를 비교(比較)하고자 실시하였던 바, 두 종류의 절편체에 실시하였던 바, 두 종류의 절편체에 있어서 캘리스 및 체세포배의 유도에 있어 2.4-D는 효과가 없었다. 줄기 절편(切片)으로부터 캘러스의 유도(誘導)는 2,4-D에 비해 IAA와 NAA 첨가(添加)의 경과(境過)에 양호하였으며, 체세포배(體細胞胚)의 유도(誘導)는 배발생(胚發生) 캘러스를 0.1mg/L 1AA와 1.0mg/L BAP 처리구(處理區)인 저농도(低濃度)의 auxin 처리구(處理區)와 식물생장조절물질(植物生長調節物質)이 첨가(添加)되지 않은 배지에 이식(移植)하여 배양(培養)과 경과(境過)에 양호(良好)하였으나. 2,4-D의 처리구(處理區) (0.2-1.0mg/L)에 이식(利殖)하여 배양한 경우에는 일어나지 않았다. 또한, 약(葯)으로부터 캘러스의 유도(誘導)는, 발달단계별(發達段階別)로는 초기 1핵기에서 그리고, 저온(低溫) 처리는 $4^{\circ}C$에서 3일간 전처리(前處理)한 경우(境遇)에 양호(良好)하였고, 2.4-D에 비해 NAA 처리시(處理時)에 양호(良好)하였으며, 그리고 charcoal 처리시(處理時)엔 전혀 일어나지 않았다. 한편 체세포배(體細胞胚)의 유도(誘導)는 줄기절편에서와 같이 2,4-D처리시에는 일어나지 않았으나, 줄기절편의 경우와는 달리 1.0mg/L NAA와 1.0mg/L BAP 처리구와 2.0mg/L NAA와 0.2mg/L BAP 처리구(處理區)인 고농도(高濃度)의 auxin 처리구(處理區)에서 양호(良好)하여, 줄기 절편과 약에 있어서 생장조절물질(生長調節物質)에 대한 반응에 차이(差異)가 다소 있음을 알 수 있었다. 약유래 식물체의 염색체(染色體)조사결과 대부분이 2n=34이었으며, 소수(小數) (5.4%)가 4배체이었다.

Keywords

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