气候变化领域集成服务门户(CCPortal): Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai-Tibet Plateau

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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
通讯作者	Yang, YP (通讯作者)
发表日期	2015
ISSN	1916-2790
EISSN	1916-2804
起始页码	651
结束页码	662
卷号	93 期号:10
英文摘要	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	SUB-ALPINE MEADOW SIZE VARIATION COMPARATIVE ECOLOGY GENOME SIZE SOIL-TYPE MASS GERMINATION DISPERSAL GROWTH EVOLUTION
英文关键词	Stipa purpurea; seed characteristics; alpine steppe; genome size; Qinghai-Tibet Plateau
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000362004100003
来源期刊	BOTANY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258519
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]. 中国科学院青藏高原研究所,2015,93(10).
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).
MLA	Li, Xiong,et al."Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai-Tibet Plateau".BOTANY 93.10(2015).