干旱区生态环境知识资源中心(Arid): Variation in the seasonal germination niche across an elevational gradient: the role of germination cueing in current and future climates

Arid

DOI	10.1002/ajb2.1425
	Variation in the seasonal germination niche across an elevational gradient: the role of germination cueing in current and future climates
	Gremer, Jennifer R.1,2; Chiono, Alec 1,3; Suglia, Elena 1,4; Bontrager, Megan 1,2; Okafor, Lauren 5; Schmitt, Johanna 1,2
通讯作者	Gremer, Jennifer R.
来源期刊	AMERICAN JOURNAL OF BOTANY
ISSN	0002-9122
EISSN	1537-2197
出版年	2020
卷号	107 期号:2 页码:350-363
英文摘要	Premise The timing of germination has profound impacts on fitness, population dynamics, and species ranges. Many plants have evolved responses to seasonal environmental cues to time germination with favorable conditions; these responses interact with temporal variation in local climate to drive the seasonal climate niche and may reflect local adaptation. Here, we examined germination responses to temperature cues in Streptanthus tortuosus populations across an elevational gradient. Methods Using common garden experiments, we evaluated differences among populations in response to cold stratification (chilling) and germination temperature and related them to observed germination phenology in the field. We then explored how these responses relate to past climate at each site and the implications of those patterns under future climate change. Results Populations from high elevations had stronger stratification requirements for germination and narrower temperature ranges for germination without stratification. Differences in germination responses corresponded with elevation and variability in seasonal temperature and precipitation across populations. Further, they corresponded with germination phenology in the field; low-elevation populations germinated in the fall without chilling, whereas high-elevation populations germinated after winter chilling and snowmelt in spring and summer. Climate-change forecasts indicate increasing temperatures and decreasing snowpack, which will likely alter germination cues and timing, particularly for high-elevation populations. Conclusions The seasonal germination niche for S. tortuosus is highly influenced by temperature and varies across the elevational gradient. Climate change will likely affect germination timing, which may cascade to influence trait expression, fitness, and population persistence.
英文关键词	Arabidopsis Brassicaceae climate change dormancy germination temperature niche construction phenology plasticity stratification Streptanthus tortuosus
类型	Article
语种	英语
国家	USA
开放获取类型	Green Published, Bronze
收录类别	SCI-E
WOS记录号	WOS:000513130000001
WOS关键词	BET-HEDGING GERMINATION ; SEED-GERMINATION ; ANNUAL PLANTS ; OPTIMIZING REPRODUCTION ; ARABIDOPSIS-THALIANA ; COLD-STRATIFICATION ; NATURAL-SELECTION ; RAPID EVOLUTION ; DESERT ANNUALS ; TRAITS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	University of California, Davis
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314001
作者单位	1.Univ Calif Davis, Dept Evolut & Ecol, Davis, CA 95616 USA; 2.Univ Calif Davis, Ctr Populat Biol, Davis, CA 95616 USA; 3.Univ San Francisco, Dept Biol, 2310 Fulton St, San Francisco, CA 94117 USA; 4.Univ Calif Davis, Populat Biol Grad Grp, Davis, CA 95616 USA; 5.Howard Univ, Dept Biol, 415 Coll St NW, Washington, DC 20059 USA
推荐引用方式 GB/T 7714	Gremer, Jennifer R.,Chiono, Alec,Suglia, Elena,et al. Variation in the seasonal germination niche across an elevational gradient: the role of germination cueing in current and future climates[J]. University of California, Davis,2020,107(2):350-363.
APA	Gremer, Jennifer R.,Chiono, Alec,Suglia, Elena,Bontrager, Megan,Okafor, Lauren,&Schmitt, Johanna.(2020).Variation in the seasonal germination niche across an elevational gradient: the role of germination cueing in current and future climates.AMERICAN JOURNAL OF BOTANY,107(2),350-363.
MLA	Gremer, Jennifer R.,et al."Variation in the seasonal germination niche across an elevational gradient: the role of germination cueing in current and future climates".AMERICAN JOURNAL OF BOTANY 107.2(2020):350-363.