摘要
以玉铃花种子为试材,从种皮透水性、种子不同部位的浸提液萌发抑制测定等方面探讨了种子休眠原因,并用低温层积处理打破种子休眠,测定层积过程中4种内源激素含量变化,研究4种内源激素对种子萌发的影响。结果表明:玉铃花种皮存在一定的透水性障碍和机械束缚;玉铃花种皮及胚乳(胚)中均含有抑制种子萌发的物质,且抑制强度为种皮<胚乳(胚),低温层积可有效打破种子休眠;随着层积时间延长,GA含量明显上升,ABA含量急剧下降,IAA/ABA、ZR/ABA及GA/ABA的比值升高可促进种子萌发。
Styrax obassiaseeds were used as material.In this study,seed dormancy reasons were investigated by permeability of testa,and the bioassay of extracts from different parts of seeds were determined.The seeds were treated by cold stratification,and the content of endogenous hormones,such as ABA,GA,IAA and ZR,were measured to study the effect of endogenous hormones on seed germination.The results showed that the testa had some difficulty in permeability and mechanical restraint.There were germination inhibitions in all parts of seeds,and the order of inhibitory effect was testaendosperm（embryo）.Cold stratification could break the seed dormancy and promote germination effectively.As the stratification time extended,GA content increased obviously and ABA content fell sharply.Higher ratio of GA/ABA,IAA/ABA,and ZR/ABA could promote seed germination.
出处
《北方园艺》
CAS
北大核心
2017年第6期91-95,共5页
Northern Horticulture
基金
山东省农业良种工程重大资助项目(鲁农良字[2010]6号)
关键词
玉铃花种子
休眠原因
低温层积
内源激素
Styrax obassiaseeds
dormancy reason
cold stratification
endogenous hormone
