农学学报2025，Vol.15Issue(7)：28-35,8.
杜鹃花属植物种子形态及在赤霉素处理下的萌发特性
Seed Morphology of Rhododendron Species and Germination Characteristics Under Gibberellin Treatment
摘要
Abstract
In order to explore the morphological characteristics and germination characteristics of Rhododendron species,the morphological structures of seeds from eight species were observed using a stereo microscope(LIOO SZ745).We also explored the impacts of gibberellin(GA3)concentration,GA3 treatment time,and soaking time in water on the germination traits of Rhododendron species.Additionally,we conducted a comparative analysis of germination traits among different species and provenances of Rhododendron species,as well as the impact of seed size on germination.The results showed that:(1)the seeds of the Rhododendronspecies were spindle-shaped,oval and small,the longitudinal and the aspect ratio of R.micranthum seeds was significantly higher than the other three Rhododendron seeds,the transverse diameter of the R.molle seeds was significantly higher than the other three Rhododendron seeds(P<0.01).(2)R.micranthum had the highest germination rate at GA3 0 mg/L,4 h in the processing time,and the soaking time of 24 h;R.simsii seed was the highest in germination rate at GA3100 mg/L,the processing time was 12 h,and the soaking time was 48 h;when the GA3 400 mg/L,the processing time was 4 h,the soaking time was 24 h,the germination rate of the R.mucronulatum was the highest;when the GA3 0 mg/L,the processing time was 4 h,the soaking time was 48 h,the germination rate of R.molle was the highest.(3)There were differences in germination rate,germination potential,germination lag,germination peak,germination duration and germination index of Rhododendron seeds among different provenances.R.simsii had the highest germination rate and germination potential,R.mucronulatum had the longest germination lag,germination peak and germination duration,and R.molle had the largest germination index.(4)The longitudinal diameter,transverse diameter and aspect ratio of Rhododendron seeds were negatively correlated with germination rate,germination potential,germination time lag,germination peak period,germination duration and germination index.This study can provide a theoretical basis for species identification and introduction and propagation of Rhododendron plants.关键词
杜鹃花属/种子形态/萌发特性/种源/赤霉素/正交试验Key words
Rhododendron/seed morphology/germinating characteristics/provenance/gibberellin/orthogonal test分类
农业科技引用本文复制引用
徐佳,赵勇,罗磊,赵进红,张倩,周光锋..杜鹃花属植物种子形态及在赤霉素处理下的萌发特性[J].农学学报,2025,15(7):28-35,8.基金项目
中央财政林业科技推广示范项目"映山红等6种杜鹃精准育苗与种植技术示范推广"(鲁[2022]TG07号). （鲁[2022]TG07号）
