Effects of Several Factors on Embryogenesis in Anther Culture of Broccoli(Brassica oleracea L. var. italica Plenck.)

녹색꽃양배추(Broccoli)의 葯培養에 있어서 배발생에 미치는 몇가지 要因分析

  • Published : 1998.07.01

Abstract

The effect of several factors on efficiency of anther culture of broccoli was studied. The medium supplemented with 14% sucrose, 125mg/L of silver nitrate and 0.1mg/L of each of NAA and 2,4-D was best in embryogenesis in all varieties tested. The effect of auxin was affected by silver nitrate, that is, it lowered embryogenesis when the concentration of NAA and 2,4-D was low, but it enhanced when their concentrations were high. Benzyl aminopurine increased embryogenesis in some varieties, but decreased in others. Although microspore embryogenesis was observed in anthers of which heigest was 1 to 0.6 - 1.0 of petal heigest in the bud, which corresponds to the early uninucleate to early binucleate stage of the microspores, it was much better when the ratio of heigest was 1 : 0.8. More embryos ware inducted from culture in March than in February in general. Because there was a big yearly variation, it was assumed that microspore embryogenesis was influenced greatly by the culture condition and the physiological condition of donor plants.

녹색꽃양배추의 약배식에 있어서 배발생에 미치는 제요인의 영향을 구명하고자 7개의 시판종으로 2년에 걸쳐 일련의 실험을 실시한 결과는 다음과 같다. 1. 소포자 배발생에 미치는 수정B5배지의 sucrose농도는 10%보다 14%가 우수하였다. 2.. NAA와 2,4-D처리는 질산은 첨가에 영향을 받아서 모든 품종에서 농도가 낮을(0.1mg/L) 경우 AgNO$_3$의 첨가에서 배발생율을 낮추었다. 3. BAP는 품종에 따라 배발생효율을 크게 낮추거나 높이는 등 품종간 차이가 확인되었다. 4. NAA와 2,4-D 농도가 높거나 sucrose 농도가 10%보다 14%였을때 배발생률을 높였다. 5. 꽃잎길이가 약길이의 0.6~l배 정도의 화뢰에서 채취된 약에서는 배발생을 볼 수 있었으며, 이때 소포자 발달단계는 1핵기초에서 2핵기초였고, 가장 좋았던 것은 1핵기후기부터 화분유사분열기로서 화뢰성장단계는 꽃잎길이가 약길이의 약 0.8배 때였다. 6. 약의 치상시기는 3월초가 2월초에 비하여 좋았으나 품종간 차이가 켰으며, 배발생에 효과적인 35$^{\circ}C$의 고온처리 요구기간도 품종간 차가 있고, 동일품종이라도 연차변이가 있어 채취 모본의 생리 및 배양조건에 따라 미치는 영향이 다름을 확인 할 수 있었다.

Keywords

References

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