热带亚热带植物学报2024，Vol.32Issue(3)：387-396,10.DOI:10.11926/jtsb.4756
紫楠种子休眠原因和快速解除方法研究
Studies on the Causes of Seed Dormancy of Phoebe sheareri and Rapid Removal Methods
摘要
Abstract
By understanding the causes of seed dormancy of Phoebe sheareri,mechanical,acid-alkali corrosion and lamination treatment(5℃-25℃)were used to study the best methods to relieve seed dormancy.The results showed that the low permeability of seed coat was the main reason for inhibiting seed germination,and the seed dormancy type was physical dormancy.Acid and alkali corrosion treatments could not effectively break seed dormancy.After the seeds were treated with concentrated sulfuric acid and sodium hydroxide for different time(1-25 min),the germination rate was increased by 33%-55%,but the seeds were seriously damaged,and the decay rate was as high as 30%-97%.Both mechanical treatment and stratification treatments could effectively break seed dormancy,and removing whole seed coat by mechanical treatment had the best effect,and seed germination rate and germination potential increased by 99.33%and 76.00%,respectively.But this method was time-consuming and laborious.The seeds under 25℃warm stratification for 45 d,25℃/15℃and 5℃/25℃/5℃variable temperature stratification for 60 d could effectively promote germination,with the germination rate and germination potential increased by 89%-93%and 79%-83%,respectively,and there were no obvious differences in germination rate and germination potential among these types of stratification.However,compared with warm stratification,variable temperature stratification requires longer stratification time and higher seed decay rate.Therefore,25℃warm stratification for 45 d was the optimal way for breaking seed dormancy of P.sheareri.关键词
紫楠/种子休眠/解除休眠/种子发芽/层积Key words
Phoebe sheareri/Seed dormancy/Dormancy breaking/Seed germination/Stratification引用本文复制引用
林秀灵,史锋厚,余中华,龙字文,蒋学莉,沈永宝..紫楠种子休眠原因和快速解除方法研究[J].热带亚热带植物学报,2024,32(3):387-396,10.基金项目
江苏省林业科技创新与推广项目(LYKJ[2021]03) （LYKJ[2021]03）
广东生态工程职业学院 2020 年应用技术协同创新中心项目 （）
广州市科技计划项目(202102021289)资助 This work was supported by the Project for Innovation and Promotion of Forestry Science and Technology in Jiangsu(Grant No.LYKJ[2021]03),the Project for Collaborative Innovation Center of Applied Technology in 2020 of Guangdong Eco-Engineering Polytechnic,and the Project for Science and Technology Plan of Guangzhou(Grant No.202102021289). （202102021289）
