干旱区生态环境知识资源中心(Arid): Dormancy and germination strategies of a desert winter annual Echinops gmelini Turcz. in a temperate desert of China

Arid

DOI	10.1111/1440-1703.1004
	Dormancy and germination strategies of a desert winter annual Echinops gmelini Turcz. in a temperate desert of China
	Wang, YanLi 1,2; Li, XinRong1 ; Liu, LiChao 1; Zhao, JieCai 1; Song, Guang 1; Zhou, YuanYuan 1,2
通讯作者	Li, XinRong
来源期刊	ECOLOGICAL RESEARCH
ISSN	0912-3814
EISSN	1440-1703
出版年	2019
卷号	34 期号:1 页码:74-84
英文摘要	Echinops gmelini Turcz. is an annual Asteraceae species widely distributed in the desert habitats of northern China. However, little is known about how this species adapts to harsh desert habitats. In this study, E. gmelini germination behaviors were observed in a natural population at the southeastern edge of the Tengger Desert. In addition, the effects of temperature, light, hydration-dehydration (H-D) cycles and different storage conditions on seed germination were tested in the laboratory. E. gmelini behaves as a winter annual, and its seeds germinate during the summer and early autumn in the field. Fresh seeds have non-deep physiological dormancy (PD). A 15-day dry storage treatment under laboratory conditions was required to break PD. Non-dormant seeds can germinate rapidly and at a high rate in light at 30/20 degrees C. Dry storage with seasonal temperature changes had little effect on seed germination and dormancy. However, under natural field conditions, greater and faster germination at a wide range of temperatures was observed after seeds were stored for 1-2 months, which allows seeds to germinate during short periods of moisture availability; seeds were induced into secondary dormancy after storage for 3 months which may prevent germination in autumn. Furthermore, seed germination was reduced and became faster after exposure to four or more H-D cycles. Our results suggest that precipitation is the key factor in determining E. gmelini seed germination time in natural habitats, and they provide information about the strategies that annual plants need to adapt to climatically unpredictable environments in temperate deserts.
英文关键词	dormancy Echinops gmelini Turcz germination temperate desert winter annual
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000457098500013
WOS关键词	BIOLOGICAL SOIL CRUSTS ; SEED-GERMINATION ; TENGGER-DESERT ; VEGETATION ; DYNAMICS ; SURVIVAL ; BANK ; STABILIZATION ; POPULATION ; EMERGENCE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215230
作者单位	1.Chinese Acad Sci, Northwest Inst Eco Environm & Resources, Shapotou Desert Res & Expt Stn, 320 Donggang West Rd, Lanzhou 73000, Gansu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, YanLi,Li, XinRong,Liu, LiChao,et al. Dormancy and germination strategies of a desert winter annual Echinops gmelini Turcz. in a temperate desert of China[J],2019,34(1):74-84.
APA	Wang, YanLi,Li, XinRong,Liu, LiChao,Zhao, JieCai,Song, Guang,&Zhou, YuanYuan.(2019).Dormancy and germination strategies of a desert winter annual Echinops gmelini Turcz. in a temperate desert of China.ECOLOGICAL RESEARCH,34(1),74-84.
MLA	Wang, YanLi,et al."Dormancy and germination strategies of a desert winter annual Echinops gmelini Turcz. in a temperate desert of China".ECOLOGICAL RESEARCH 34.1(2019):74-84.