Dormancy cycling and persistence of seeds in soil of a cold desert halophyte shrub

doi:10.1093/aob/mct256

	Dormancy cycling and persistence of seeds in soil of a cold desert halophyte shrub
	Cao, Dechang 1; Baskin, Carol C.; Baskin, Jerry M.; Yang, Fan 1; Huang, Zhenying
	2014
发表期刊	ANNALS OF BOTANY
ISSN	0305-7364
卷号	113 期号:1 页码:171-179
摘要	Formation of seed banks and dormancy cycling are well known in annual species, but not in woody species. In this study it was hypothesized that the long-lived halophytic cold desert shrub Kalidium gracile has a seed bank and dormancy cycling, which help restrict germination to a favourable time for seedling survival. Fresh seeds were buried in November 2009 and exhumed and tested for germination monthly from May 2010 to December 2011 over a range of temperatures and salinities. Germination recovery and viability were determined after exposure to salinity and water stress. Seedling emergence and dynamics of the soil seed bank were investigated in the field. Seeds of K. gracile had a soil seed bank of 7030 seedsm(2) at the beginning of the growing season. About 72 of the seeds were depleted from the soil seed bank during a growing season, and only 14 of them gave rise to seedlings that germinated early enough to reach a stage of growth at which they could survive to overwinter. About 28 of the seeds became part of a persistent soil seed bank. Buried seeds exhibited an annual non-dormancy/conditional dormancy (ND/CD) cycle, and germination varied in sensitivity to salinity during the cycle. Dormancy cycling is coordinated with seasonal environmental conditions in such a way that the seeds germinate in summer, when there is sufficient precipitation for seedling establishment. Kalidium gracile has three life history traits that help ensure persistence at a site: a polycarpic perennial life cycle, a persistent seed bank and dormancy cycling. The annual ND/CD cycle in seeds of K. gracile contributes to seedling establishment of this species in the unpredictable desert environment and to maintenance of a persistent soil seed bank. This is the first report of a seed dormancy cycle in a cold desert shrub.
关键词	Cold desert habitat dormancy cycling halophyte Kalidium gracile salt tolerance seed germination seedling recruitment soil seed bank
学科领域	Plant Sciences
DOI	10.1093/aob/mct256
收录类别	SCI
语种	英语
WOS关键词	SEEDLING EMERGENCE ; DIMORPHIC SEEDS ; GERMINATION ; BANKS ; DYNAMICS ; ECOLOGY ; ANNUALS ; CYCLES ; PLANTS
WOS研究方向	Plant Sciences
WOS记录号	WOS:000329063300021
出版者	OXFORD UNIV PRESS
文献子类	Article
出版地	OXFORD
EISSN	1095-8290
资助机构	Key Basic Research and Development Plan of China [2012BAD16B03, 2010CB951304] ; National Natural Science Foundation of P. R. China [30872074] ; Joint Project of Ministry of Environmental Protection of P.R. China ; Chinese Academy of Sciences [STSN-21-04]
作者邮箱	zhenying@ibcas.ac.cn
作品OA属性	Bronze, Green Published
引用统计	被引频次：36[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/2S10CLM1/27098
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Baskin, Carol C.; Baskin, Jerry M.] Univ Kentucky, Dept Biol, Lexington, KY 40546 USA 4.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA
推荐引用方式 GB/T 7714	Cao, Dechang,Baskin, Carol C.,Baskin, Jerry M.,et al. Dormancy cycling and persistence of seeds in soil of a cold desert halophyte shrub[J]. ANNALS OF BOTANY,2014,113(1):171-179.
APA	Cao, Dechang,Baskin, Carol C.,Baskin, Jerry M.,Yang, Fan,&Huang, Zhenying.(2014).Dormancy cycling and persistence of seeds in soil of a cold desert halophyte shrub.ANNALS OF BOTANY,113(1),171-179.
MLA	Cao, Dechang,et al."Dormancy cycling and persistence of seeds in soil of a cold desert halophyte shrub".ANNALS OF BOTANY 113.1(2014):171-179.

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