干旱区生态环境知识资源中心(Arid): Optimizing physiological dormancy break of understudied cold desert perennials to improve seed-based restoration

Arid

DOI	10.1016/j.jaridenv.2019.104001
	Optimizing physiological dormancy break of understudied cold desert perennials to improve seed-based restoration
	Kildisheva, Olga A.1,2,3; Erickson, Todd E.1,2; Kramer, Andrea T.3; Zeldin, Jacob 3; Merritt, David J.1,2
通讯作者	Kildisheva, Olga A.
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2019
卷号	170
英文摘要	In degraded drylands, post-disturbance native plant community re-establishment is almost exclusively conducted using seeds. These restoration efforts are challenging, in large part as a result of a limited understanding of seed dormancy and germination traits. In this paper, we characterize these traits for four herbaceous perennials (Asteraceae) that are widely distributed and highly desired in the restoration of ecologically imperiled drylands of North America. We assess baseline germination and the effects of chemical stimulants across a suite of temperatures and quantify the influence of (1) cold stratification, (2) dry after-ripening, and (3) dry cold storage on germination. Three months of cold stratification achieved near-maximum dormancy alleviation for all species. Exposure to warmer temperatures following stratification increased germination further, reducing the required stratification length. Across all species, at least a third of seeds maintained at 3 +/- 2 degrees C germinated, suggesting that in situ germination occurs in late winter or early spring. Changes in the thermal germination envelope were species-dependent, indicating different germination niches and strategies for population persistence. Dry after-ripening and cold storage improved germination, but responses were highly variable across species, temperature, and time. Chemical stimulants promoted germination in three species and may be an alternative to cold stratification or after-ripening.
英文关键词	Sagebrush steppe Gibberellic acid Karrikinolide Stratification Dry after-ripening Cold storage
类型	Article
语种	英语
国家	Australia ; USA
收录类别	SCI-E
WOS记录号	WOS:000491622500004
WOS关键词	GREATER SAGE-GROUSE ; PREDICTING GERMINATION ; TEMPERATURE ; BASIN ; TIME ; VALIDATION ; STRATEGIES ; SAGEBRUSH ; MODELS ; PLANT
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-11-01
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310681
作者单位	1.Univ Western Australia, Sch Biol Sci, Crawley, WA, Australia; 2.Kings Pk Sci, Dept Biodivers Conservat & Attract, Kings Pk, WA, Australia; 3.Chicago Bot Garden, Glencoe, IL USA
推荐引用方式 GB/T 7714	Kildisheva, Olga A.,Erickson, Todd E.,Kramer, Andrea T.,et al. Optimizing physiological dormancy break of understudied cold desert perennials to improve seed-based restoration[J]. University of Western Australia,2019,170.
APA	Kildisheva, Olga A.,Erickson, Todd E.,Kramer, Andrea T.,Zeldin, Jacob,&Merritt, David J..(2019).Optimizing physiological dormancy break of understudied cold desert perennials to improve seed-based restoration.JOURNAL OF ARID ENVIRONMENTS,170.
MLA	Kildisheva, Olga A.,et al."Optimizing physiological dormancy break of understudied cold desert perennials to improve seed-based restoration".JOURNAL OF ARID ENVIRONMENTS 170(2019).