Timing of seed germination in two alpine herbs on the southeastern Tibetan plateau: the role of seed dormancy and annual dormancy cycling in soil

doi:10.1016/j.envexpbot.2017.02.006

	Timing of seed germination in two alpine herbs on the southeastern Tibetan plateau: the role of seed dormancy and annual dormancy cycling in soil
	Wang, Guoyan 1; Baskin, Carol C.; Baskin, Jerry M.; Yang, Xuejun ; Liu, Guofang ; Zhang, Xinshi ; Ye, Xuehua ; Huang, Zhenying
	2017
发表期刊	PLANT AND SOIL
ISSN	0032-079X
卷号	421 期号:1-2 页码:465-476
摘要	Germination timing strongly affects the probability of seedling survival and the conditions for subsequent plant growth and reproduction. For alpine species, timing of germination should be restricted to a period that ensures seedlings will attain a critical size during the short growing season and thus survive winter. Thus, we hypothesized that seeds of herbaceous alpine perennials germinate only at the beginning of the growing season in spring, when temperatures are low, and the seed dormancy mechanism helps synchronize the germination event to the beginning of the growing season. Seed traits and effects of light, temperature, cold stratification and GA(3) on germination of Primula alpicola and Pedicularis fletcheri were tested in the laboratory and germination responses to temperature of seeds buried in the field at 4500 m a.s.l. and exhumed over a 2-year period were investigated. Fresh seeds were dormant, and cold stratification and GA(3) overcame dormancy in seeds of both species and the light requirement for germination of P. alpicola seeds. Buried seeds of both species exhibited an annual dormancy/nondormancy/dormancy cycle. Seeds of P. alpicola and P. fletcheri have nondeep physiological dormancy and dormancy cycling. Dormancy cycling was coordinated with seasonal environmental conditions, and seeds germinated soon after snowmelt in late spring. This is the first comprehensive demonstration of regulation of germination timing by dormancy cycling in alpine plants.
关键词	Buried seeds Light sensitivity Local adaptation Pedicularis fletcheri Physiological dormancy Primula alpicola Secondary dormancy
学科领域	Plant Sciences ; Environmental Sciences & Ecology
DOI	10.1016/j.envexpbot.2017.02.006
收录类别	SCI
语种	英语
WOS关键词	GLACIER FORELAND ; SEASONAL-CHANGES ; BURIED SEEDS ; ESTABLISHMENT ; STRATEGIES ; EMERGENCE ; RESPONSES ; RECRUITMENT ; SURVIVAL ; GROWTH
WOS记录号	WOS:000398752400015
出版者	SPRINGER
文献子类	Article
出版地	DORDRECHT
EISSN	1573-5036
资助机构	National Natural Science Foundation of P. R. ChinaNational Natural Science Foundation of China (NSFC) [31570416, 31370705, 31560153]
作者邮箱	yexuehua@ibcas.ac.cn ; zhenying@ibcas.ac.cn
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/22171
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA 4.Baskin, Carol C.; Baskin, Jerry M.] Univ Kentucky, Dept Biol, Lexington, KY 40506 USA
推荐引用方式 GB/T 7714	Wang, Guoyan,Baskin, Carol C.,Baskin, Jerry M.,et al. Timing of seed germination in two alpine herbs on the southeastern Tibetan plateau: the role of seed dormancy and annual dormancy cycling in soil[J]. PLANT AND SOIL,2017,421(1-2):465-476.
APA	Wang, Guoyan.,Baskin, Carol C..,Baskin, Jerry M..,Yang, Xuejun.,Liu, Guofang.,...&Huang, Zhenying.(2017).Timing of seed germination in two alpine herbs on the southeastern Tibetan plateau: the role of seed dormancy and annual dormancy cycling in soil.PLANT AND SOIL,421(1-2),465-476.
MLA	Wang, Guoyan,et al."Timing of seed germination in two alpine herbs on the southeastern Tibetan plateau: the role of seed dormancy and annual dormancy cycling in soil".PLANT AND SOIL 421.1-2(2017):465-476.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
1-s2.0-S009884721730（1502KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文