西藏麻黄种子、萌发及种子储备性状在不同海拔梯度的差异

Mengnan Lu, Xiaona Wang, Shengnan Zhang, Shiyan Wang, Ji De
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引用次数: 0

摘要

麻黄(Ephedra saxatilis)是一种重要的药用植物,属麻黄属植物,在中国西藏广泛生长。采集低海拔(3500-4000 m)、中海拔(4000-4500 m)、高海拔(4500-5000 m)不同海拔梯度的种子,研究不同海拔梯度对种子形态性状、萌发参数、幼苗形态、种子萌发过程中形态变化及未裂种子、11个与种子贮藏相关的生化变量的影响。使用相关分析来检验这些变量之间的关系。种子萌发的过程分为五个阶段。在第三阶段没有改变颜色的种子不能继续生长。低海拔地区种子的发芽率、含水量和还原糖含量显著高于低海拔地区,但萌发时间较长。而来自高海拔地区的种子则具有较高的叶黄素、可溶性酚和灰分含量。在生化指标中,不同海拔的发芽率与维生素E、水分、总黄酮和可溶性蛋白含量呈正相关。幼苗生长状态分为五个阶段。结果表明,种子在不同海拔梯度上存在显著差异。来自低海拔地区的沙雀花种子比来自中、高海拔地区的沙雀花种子具有生存优势。
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Seed, Germination, and Seed-Reserve Traits of Ephedra saxatilis Differ Along Different Altitudinal Gradients in Tibet, China
Ephedra saxatilis , an important medicinal plant species belonging to the genus Ephedra , grows at a wide range of altitudes in Tibet, China. Collect seeds with different altitude gradients at low altitude (3500–4000 m), medium altitude (4000–4500 m), and high altitude (4500–5000 m), and study the effects of different altitude gradients on seed morphological traits, germination parameters, Seedling morphology, the morphological changes in the process of seed germination and uncracked seeds, 11 biochemical variables related to seed storage. Use correlation analysis to test the relationship between these variables. The process of seed germination is divided into five stages. Seeds that did not change color in stage III did not continue to grow. Seeds from low altitudes had significantly higher percentage of germination, and water contents and reducing sugars contents, but longer germination time. Seeds from high altitudes, however, had higher Xanthophyll, soluble phenolic, and ash contents. Among the examined biochemical variables, the germination rate at different altitudes was positively correlated with vitamin E, water content, and total flavonoid and soluble protein contents. Seedling growth state is divided into five stages. Our results confirm that seed differed significantly across different altitudinal gradients. Seeds of E. saxatilis from low altitudes had a survival advantage over those from medium and high altitudes.
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来源期刊
Journal of Biobased Materials and Bioenergy
Journal of Biobased Materials and Bioenergy 工程技术-材料科学:生物材料
自引率
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发文量
60
审稿时长
6 months
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