生态学杂志2016，Vol.35Issue(3)：655-660,6.DOI:10.13292/j.1000-4890.201603.014
青藏高原东北缘高寒草甸41种菊科植物种子大小与其主要营养成分含量的关系
The relationship between seed size and main reserve contents of seeds in 41 Asteraceae species of alpine meadow in the northeastern Qinghai-Tibet Plateau
摘要
Abstract
The components and contents of nutrients in seeds play important roles in seed germination and subsequent seedling establishment;the difference in reserve contents may lead to seed take different strategies in germination and seedling growth.In this study,the relationship between main reserve contents and seed weight of 41 Asteraceae species on the northeast QinghaiTibet Plateau was analyzed,to clarify the adaptation variation of alpine plants with seed weight.The contents of crude fats,sugar and starch,ahd protein were determined by Soxhlet extraction,anthrone colorimetric method,and Coomassie Brilliant Blue G-250.The results showed that the contents of proteins and crude fats were decreased significantly with increasing seed weight,but the contents of soluble sugar and starch had no significant correlations with seed weight.No significant change of the contents of soluble sugar and starch in larger seeds might result from the thicker coats of larger seeds.Relatively higher percentages of fat and protein in smaller seeds might provide enough energy for faster growth of seedlings,which could help the smaller-seed species to gain temporal and spatial advantages and might be a trade-off to overcome the disadvantages of smaller seedlings produced by smaller seeds.关键词
高寒草甸/菊科/营养成分含量/种子质量Key words
alpine meadow/Asteraceae/nutrimental content/seed weight引用本文复制引用
杨慧仙,卜海燕,葛文静,王学经,夏玉斌,马冰..青藏高原东北缘高寒草甸41种菊科植物种子大小与其主要营养成分含量的关系[J].生态学杂志,2016,35(3):655-660,6.基金项目
国家自然科学基金项目(41171046)资助. （41171046）
