干旱区生态环境知识资源中心(Arid): Dynamics of the diaspore and germination stages of the life history of an annual diaspore-trimorphic species in a temperate salt desert

Arid

DOI	10.1007/s00425-020-03380-8
	Dynamics of the diaspore and germination stages of the life history of an annual diaspore-trimorphic species in a temperate salt desert
	Wang, Zhaoren 1,4,5; Baskin, Jerry M.2; Baskin, Carol C.2,3; Yang, Xuejun 1,5; Liu, Guofang 1,5; Huang, Zhenying 1,5
通讯作者	Huang, Zhenying
来源期刊	PLANTA
ISSN	0032-0935
EISSN	1432-2048
出版年	2020
卷号	251 期号:4
英文摘要	Main conclusion Individuals of the annual halophyte Atriplex centralasiatica produce three kinds of diaspores that differ in dispersal, dormancy/germination response and type of seed bank formed, which likely is a bet-hedging strategy in the rainfall-unpredictable environment on the semi-arid, saline Ordos Plateau in Inner Mongolia, China. Seasonal fluctuations in environmental conditions provide germination cues for the establishment of seedlings at the right time and place to ensure plant survival and population regeneration. Diaspore heteromorphism is a phenomenon in which diaspores with stark qualitative differences in morphology and ecology are produced by the same maternal plant. Germination responses and dispersal times of the annual halophyte Atriplex centralasiatica were examined to determine the role of diaspore heteromorphism in its adaptation to salt desert conditions. A. centralasiatica is a tumbleweed that produces three types of diaspores that differ in morphology and ecophysiology. The relative potential dispersal ability and intensity of dormancy of the three diaspore types was type A (fan-shaped diaspores with yellow fruits) < type B (fan-shaped diaspores with black fruits) < type C (globular diaspores with black fruits). In the field, type A retained high germinability, but all of them were depleted from the (transient) soil seedbank in the first growing season. Types B and C cycled between dormancy and nondormancy, and 0 and > 90.0% remained in the soil seedbank 2 years after dispersal, respectively. The dormancy, dispersal and salt tolerance of type B diaspores were intermediate between those of A and C. Type A exhibited low dispersal-nondormancy, type B exhibited intermediate dispersal-intermediate dormancy and type C exhibited high dispersal ability-high dormancy. In the unpredictable salt desert habitat, the functional differences in germination and dispersal of the three diaspores act as a bet-hedging mechanism and ensure population establishment in different years by spreading germination over time and space.
英文关键词	Atriplex centralasiatica Bet-hedging strategy Dispersal Dormancy cycle Diaspore heteromorphism Seedbank
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000522418000001
WOS关键词	ATRIPLEX-CENTRALASIATICA ; DIMORPHIC SEEDS ; DISPERSAL ; ECOLOGY ; DORMANCY ; BANKS ; CONSEQUENCES ; ADAPTATION ; BRACTEOLES ; SYSTEM
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315344
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; 2.Univ Kentucky, Dept Biol, Lexington, KY 40506 USA; 3.Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA; 4.Univ Chinese Acad Sci, Beijing 100039, Peoples R China; 5.Chinese Acad Sci, Inner Mongolia Res Ctr Prataculture, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhaoren,Baskin, Jerry M.,Baskin, Carol C.,et al. Dynamics of the diaspore and germination stages of the life history of an annual diaspore-trimorphic species in a temperate salt desert[J]. 中国科学院植物研究所,2020,251(4).
APA	Wang, Zhaoren,Baskin, Jerry M.,Baskin, Carol C.,Yang, Xuejun,Liu, Guofang,&Huang, Zhenying.(2020).Dynamics of the diaspore and germination stages of the life history of an annual diaspore-trimorphic species in a temperate salt desert.PLANTA,251(4).
MLA	Wang, Zhaoren,et al."Dynamics of the diaspore and germination stages of the life history of an annual diaspore-trimorphic species in a temperate salt desert".PLANTA 251.4(2020).