Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai-Tibet Plateau

doi:10.1139/cjb-2015-0011

	Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai-Tibet Plateau
	Li,Xiong; Yin,Xin; Yang,Shihai; Yang,Yunqiang; Qian,Min; Zhou,Yanli; Zhang,Chan; Du,Yan; Yang,Yongping
	2015-10-01
发表期刊	BOTANY
卷号	93 期号:10 页码:651-662
摘要	Variation in seed size is common among plant species, populations, and individuals. On the Qinghai-Tibet Plateau, previous studies have mainly focused on interspecific variation in seed size, with little information available regarding intraspecific variation. The alpine steppe is among the most important vegetation types on the plateau, where it plays a vital role in preserving landscape heterogeneity and diversity. Stipa purpurea Griseb., endemic to the Qinghai-Tibet Plateau, is the predominant species of the alpine steppe. In the present study, we measured seed characteristics of nine S. purpurea populations and analyzed possible sources and consequences of variation in these characteristics. Seed characteristics varied greatly among and within populations. Our findings suggest that variation in seed size and awn length may affect germination and dispersal, respectively. Surprisingly, environmental factors, rather than genome size, were significantly correlated with seed size. For example, relative humidity and number of windy days were strongly correlated with seed size and awn length, respectively. We believe that variation in seed characteristics is a consequence of complex environmental conditions correlated with longitude and latitude. The results indicated that variation in seed characteristics of S. purpurea is an adaptation to environmental conditions.
关键词	Stipa Purpurea Seed Characteristics Alpine Steppe Genome Size Qinghai-tibet Plateau
DOI	10.1139/cjb-2015-0011
收录类别	SCI
语种	英语
WOS记录号	WOS:000362004100003
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/25168
专题	资源植物与生物技术所级重点实验室
推荐引用方式 GB/T 7714	Li,Xiong,Yin,Xin,Yang,Shihai,et al. Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai-Tibet Plateau[J]. BOTANY,2015,93(10):651-662.
APA	Li,Xiong.,Yin,Xin.,Yang,Shihai.,Yang,Yunqiang.,Qian,Min.,...&Yang,Yongping.(2015).Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai-Tibet Plateau.BOTANY,93(10),651-662.
MLA	Li,Xiong,et al."Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai-Tibet Plateau".BOTANY 93.10(2015):651-662.

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