成都中医药大学学报2025，Vol.48Issue(5)：9-13,5.DOI:10.13593/j.cnki.51-1501/r.2025.05.003
大花红景天种子形态结构及萌发特性研究
Study on Seed Morphological Structure and Germination Characteristics of Rhodiola crenulata
摘要
Abstract
Objective:To investigate the morphological structure and germination characteristics of Rhodiola crenulata(Hook.f.&Thomson)H.Ohba seeds,an endangered medicinal plant,and to provide a theoretical basis for its artificial propagation and resource conservation.Methods:The morphological characteristics of seeds were observed using a stereomicroscope,the anatomical structures of seeds were examined by means of paraffin sectioning combined with safranin-fast green staining,and the 1000-seed weight and water content of seeds were determined.The effects of temperature,light conditions,warm water soaking,and plant growth regulators on seed germination were systematically studied.Results:Rhodiola crenulata seeds are narrowly ovoid,winged,and exhibit a dicotyledon-ous exalbuminous structure.The thousand-seed weight was 0.110 g(moisture content 7.3％).The optimal germination temperature was 20℃(germination rate 94.7％,germination energy 79.4％).The seeds were categorized as positively photoblastic,with light significantly enhancing both germination rate and energy.Soaking in 50℃ water for 2 h significantly increased germination rate(98.8％)and energy(86.4％).Low concentrations of 6-BA(10-50 mg/L)significantly promoted germination(germination rate＞97％,germination energy＞81％).Conclusion:The seed germination of R.crenulata is significantly influenced by factors such as temperature,light,and hormones.The optimal germination temperature,light requirements,duration of warm water soaking,and hor-mone treatment conditions were preliminarily determined,providing key parameters for optimizing its artificial propagation techniques.关键词
大花红景天/种子形态/解剖结构/萌发特性Key words
Rhodiola crenulata/Seed morphology/Anatomical structure/Germination characteristics分类
医药卫生引用本文复制引用
徐建祥,朱文涛,王红兰,刘腾,夏立岩,邢武涛,周毅..大花红景天种子形态结构及萌发特性研究[J].成都中医药大学学报,2025,48(5):9-13,5.基金项目
国家重点研发计划(2023YFC3503803) （2023YFC3503803）
四川省科技计划项目(24DYF1657) （24DYF1657）
西藏自治区科技计划项目(XZ202402ZD0002) （XZ202402ZD0002）
