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DOI	10.1139/cjb-2014-0105
	Comparing the relationship between seed germination and temperature for Stipa species on the Tibetan Plateau
	Yang, Shihai; Li, Xiong; Yang, Yunqiang; Yin, Xin; Yang, Yongping
通讯作者	Yang, YP (通讯作者)
发表日期	2014
ISSN	1916-2790
EISSN	1916-2804
起始页码	895
结束页码	900
卷号	92 期号:12
英文摘要	Alpine steppe grasslands dominated by Stipa species (Poaceae) on the Tibetan Plateau are important model ecosystems. Here, we present data on seed germination of three typical Stipa species (Stipa purpurea Griseb., Stipa glareosa P.A. Smirn., and Stipa capillacea Keng) from the northern core region of the Tibetan Plateau. We carried out laboratory investigations of germination behavior under both constant and alternating temperatures. Germination varied significantly with temperature. Under constant temperature, we found that temperature and species, but not their interaction, had significant effects on seed germination. Under alternating temperatures, species had a significant effect on seed germination, whereas the effects of alternating temperature and the interaction between species and alternating temperature were not significant. In addition, light and the interaction of light and species had no significant effect on seed germination; however, species had a significant effect, implying that Stipa species on the Tibetan Plateau are not inhibited by light. Base temperatures of S. glareosa, S. purpurea, and S. capillacea were 1.0 degrees C, 0.1 degrees C, and -1.4 degrees C, respectively, with corresponding thermal times at suboptimal temperatures of 233 degrees C-day, 154 degrees C-day, and 263.2 degrees C-day. Our results suggest that Stipa seed germination characteristics are adaptions to a harsh environment and are species-specific.
关键词	THERMAL TIME REQUIREMENTS ENVIRONMENTAL-FACTORS EMERGENCE STEPPE LIGHT ECOLOGY DESERT CHINA PLANT GERMINABILITY
英文关键词	alpine steppe; seed germination; cardinal temperature; thermal time; Stipa species; Tibetan Plateau
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000346188900004
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/258263
推荐引用方式 GB/T 7714	Yang, Shihai,Li, Xiong,Yang, Yunqiang,et al. Comparing the relationship between seed germination and temperature for Stipa species on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2014,92(12).
APA	Yang, Shihai,Li, Xiong,Yang, Yunqiang,Yin, Xin,&Yang, Yongping.(2014).Comparing the relationship between seed germination and temperature for Stipa species on the Tibetan Plateau.BOTANY,92(12).
MLA	Yang, Shihai,et al."Comparing the relationship between seed germination and temperature for Stipa species on the Tibetan Plateau".BOTANY 92.12(2014).