Sand burial helps regulate timing of seed germination of a dominant herb in an inland dune ecosystem with a semiarid temperate climate

doi:10.1016/j.scitotenv.2019.05.087

	Sand burial helps regulate timing of seed germination of a dominant herb in an inland dune ecosystem with a semiarid temperate climate
	Ye, Xuehua 1; Li, Leilei 1; Baskin, Carol C.; Baskin, Jerry M.; Du, Juan 1; Huang, Zhenying1
	2019
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	680 页码:44-50
摘要	Sand burial plays important role in the life history of species in sandy areas of arid and semi-arid temperate regions, by affecting seed germination, seedling growth and survival and plant community. However, few studies have focused on the effects of sand burial on the dynamics of seed dormancy in such areas. In this study, seed germination characteristics of Allium tenuissimum, a dominant perennial herb in the dune ecosystem in Ordos Plateau in northern China, was investigated. Dormancy dynamics were monitored for seeds buried at sand depths of 0, 2 and 5 cm in the natural habitats for 13 months. Freshly matured seeds of A. tenuissimum were conditionally dormant and germinated to high percentages at high but not low temperatures. Germination percentages were increased by incubation at summer temperature (15/25 degrees C) and dry storage, but GA(3) and cold stratification had no significant effects. These results suggested that seeds of A. tenuissimum were conditionally dormant, and incubation under warm, wet (but not cold, wet) conditions and dry after-ripening resulted in complete dormancy releasing. Seeds buried at 2 and 5 cm in the field for 13 months exhibited seasonal changes in germination, with an increase in spring and summer followed by decrease in autumn and winter. However, seeds on the soil surface (0 cm) gradually came out of dormancy beginning in January, and germinated percentage was highest in July, after which remained high. The peak of nondormancy for seeds buried in the field was in the summer, which corresponds to the period of highest annual precipitation. Sand burial helped mediate seeds dormancy dynamics of A. tenuissimum via seasonal dormancy cycling. Our finding contributes to a better understanding of how timing of seedling establishment is controlled in a semiarid dune ecosystem in temperate climate. (C) 2019 Elsevier B.V. All lights reserved.
关键词	Allium tenuissimum Dormancy dynamics Sand burial Seed germination Seed population Soil seed bank
学科领域	Environmental Sciences
DOI	10.1016/j.scitotenv.2019.05.087
收录类别	SCI
语种	英语
WOS关键词	ANNUAL DORMANCY CYCLES ; SEASONAL-CHANGES ; SOIL ; PLANT ; PRECIPITATION ; STRATEGIES ; EMERGENCE ; SURVIVAL ; EROSION ; SYSTEM
WOS研究方向	Environmental Sciences & Ecology
WOS记录号	WOS:000468863400006
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1879-1026
资助机构	Key Basic Research and Development Plan of ChinaNational Basic Research Program of China [2016YFC0500805-02] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31870711, 31570416, 31470032]
作者邮箱	Zhenying@ibcas.ac.cn
引用统计	被引频次：13[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/2S10CLM1/19657
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.Chinese Acad Sci, Inner Mongolia Res Ctr Prataculture, Beijing 100093, Peoples R China 3.Baskin, Carol C.; Baskin, Jerry M.] Univ Kentucky, Dept Biol, Lexington, KY 40506 USA 4.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA
推荐引用方式 GB/T 7714	Ye, Xuehua,Li, Leilei,Baskin, Carol C.,et al. Sand burial helps regulate timing of seed germination of a dominant herb in an inland dune ecosystem with a semiarid temperate climate[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,680:44-50.
APA	Ye, Xuehua,Li, Leilei,Baskin, Carol C.,Baskin, Jerry M.,Du, Juan,&Huang, Zhenying.(2019).Sand burial helps regulate timing of seed germination of a dominant herb in an inland dune ecosystem with a semiarid temperate climate.SCIENCE OF THE TOTAL ENVIRONMENT,680,44-50.
MLA	Ye, Xuehua,et al."Sand burial helps regulate timing of seed germination of a dominant herb in an inland dune ecosystem with a semiarid temperate climate".SCIENCE OF THE TOTAL ENVIRONMENT 680(2019):44-50.

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