摘要
在实验室条件下观测了云杉属(Picea)10个树种的种子形态和萌发特性,分析了它们与种源地地理气候因子之间的关系。结果表明:种子长、宽、千粒质量的差异在种间达到极显著水平;除种子萌发高峰期外,种子发芽率、发芽起始时间和发芽持续时间在种间具有极显著的差异。相关性分析则表明:种子长和宽呈极显著正相关;种子长、种子宽与千粒质量呈极显著正相关;而种子千粒质量与发芽率、发芽起始时间和持续时间呈显著正相关;纬度与种子长、种子宽和千粒质量呈显著正相关;年均温与种子长、种子宽、千粒质量和发芽持续时间呈显著负相关。因此,纬度和温度是影响云杉属植物个体间种子大小变异的主要因子。
In the laboratory, we observed seed morphology and germination of ten species from Picea genus, and explored the relationships between these seed parameters and geo-climatic factors. Our results indicated that： （1） seed length and width, and seed mass of 1 000 grains were very significantly differed among ten tree species in Picea genus; （2） seed germination rate, germination start time and germination duration also had significant differences whereas germination peak had no differences among these ten tree species. In addition, the correlation analysis showed： （1） seed length was significantly and positively correlated with seed width, and they all were also significantly and positively correlated with seed mass per 1 000, furthermore, the seed mass per 1 000 had significant positive relationships with germination rate, germination start time and duration; （2） latitude exhibited significantly and positively relations to seed length and width, and seed mass per 1 000, whereas mean annual temperature showed significantly and negatively relationship with seed length and width, seed mass per 1 000 and seed duration. Therefore, latitude and temperature were primary factors affecting the variation in seed size among ten tree species in Picea genus.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第1期62-66,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家自然科学基金项目(31260049
30860026)
西藏自治区自然科学基金项目(2012-2013)
西藏自治区大学生创新计划(2014)
关键词
云杉属
种子形态
萌发特性
种间变异
Picea
seed morphology
germination characteristic
interspecific variation
