度胁迫对罂粟种子萌发影响及其活力变化规律的研究

Effects of temperature stress on germination and vitality of Papave somniferum seeds

关键词:  罂粟  温度  种子萌发  种子活力

Key words:  Papave somniferum  temperature  seed germination  seed vitality

摘要:

为妥善保存罂粟种质资源及防止种子老化,研究了温度对罂粟种子萌发及种子活力的影响。结果表明:罂粟为高温敏感低温萌发型种子,发芽的适宜温度为10～20 ℃,最适温度为18 ℃左右,低于5 ℃和高于20 ℃的温度,种子萌发受到抑制; 在对其进行丸化包衣时,加热温度应控制在60 ℃以内,时间应控制在60 min以内; 在常温库存条件下,罂粟种子活力随贮藏年限的增加而下降,贮藏时间超过五年后,发芽率低于50%,不宜作种用,在作为种质资源保存时,须每隔五年繁殖一次。

Abstract:

The effects of temperature stress on the germination and vitality of seeds of Papave somniferum L. were studied to preserve poppy germplasm resources and prevent seed aging. The results showed that poppy was high temperature sensitive and was able to germinate under low temperature. The favorable temperature for their germination was 10-20 ℃,and the optimal temperature was 18 ℃,the temperature lower than 5 ℃ and higher than 20 ℃ all could affect its germination. The temperature should be controlled within 60 ℃ and the heating time under 60 minutes when seeds pelleting. Under normal inventory conditions,with storage time increased,the poppy seed vigor dropped,and germination rate declined less than 50% as the storage time over 5 years,and was not suitable for breeding,so as the germplasm resources,it must breed again every 5 years.