摘要
以解除初生休眠的水曲柳(Fraxinus mandshurica)种子为材料,在10、25℃两种引发温度时,使用不同质量分数(0、5%、25%、50%)聚乙二醇(PEG)溶液对种子进行不同时间(1、3、7 d)的引发处理,观察不同引发处理种子在高温(25℃)下的萌发表现,分析PEG引发处理对水曲柳种子在高温(25℃)条件下萌发的影响。结果表明:PEG引发处理能够减弱高温条件下水曲柳种子热休眠的诱导,10℃引发的种子萌发能力好于25℃引发的种子。25℃引发时,使用中等质量分数(25%)的PEG溶液对种子进行中等时间(3 d)的引发处理,可以显著提高其发芽率,但延长了种子的平均发芽时间;10℃引发时,使用高质量分数(50%)的PEG溶液对种子进行中等时间(3 d)或长时间(7 d)的引发处理,可以在不延长平均发芽时间的情况下,显著提高其发芽率与发芽指数,有效阻止种子进入热休眠。
In order to investigate the effect of PEG priming treatment on the germination of Fraxinus mandshurica seeds at high temperature(25℃),the seeds of F.mandshurica,which were released from primary dormancy,were treated at 10℃ and 25℃with different mass fractions of PEG solution(0%,5%,25% and 50%)for different times(1,3 and 7 d),and the germination performance of the seeds with different priming treatment under high temperature(25℃)were observed.The results showed that PEG priming treatment can weaken the induction of thermodormancy of F.mandshurica seeds under high temperature.The germination ability of seeds primed at 10℃ is generally better than that primed at 25℃.When the seeds were primed at 25℃,the germination rate of seeds could be significantly increased by using PEG solution with medium mass fraction(25%)for 3 d,but the average germination time of seeds could be prolonged.When the seeds were primed at 10℃,the germination rate and germination index could be significantly increased without prolonging the average germination time,and the seeds could be effectively prevented from entering thermodormancy.
作者
闫月
卢艳
崔程程
张鹏
Yan Yue;Lu Yan;Cui Chengcheng;Zhang Peng(Northeast Forestry University,Harbin 150040,P.R.China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2020年第6期13-16,共4页
Journal of Northeast Forestry University
基金
国家自然科学基金项目(31870615)
中央高校基本科研业务费专项资金项目(2572019CP16)。
关键词
水曲柳
种子萌发
引发处理
热休眠
聚乙二醇6000
Fraxinus mandshurica
Sseed germination
Priming treatment
Thermodormancy
Polyethylene glycol 6000
