干旱区生态环境知识资源中心(Arid): Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters

Arid

DOI	10.1038/s41598-021-89901-1
	Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters
	Lopez, Aldana S.; Lopez, D. R.; Arana, M. V.; Batlla, D.; Marchelli, P.
通讯作者	Lopez, AS (corresponding author), INTA, CONICET, IFAB Inst Invest Forestales & Agr Bariloche, Modesta Victoria 4450, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	Sensitivity to water availability is a key physiological trait for grassland species located in arid and semiarid environments, where successful germination is closely related to rainfall dynamics. Festuca pallescens inhabits diverse environments along a steep precipitation gradient in North Patagonia, thus offering a suitable model for the study of germination behavior in response to water availability. By analyzing germination in nine populations using a hydrotime model approach, we aimed to find within-species variation. Seed population behavior was analyzed under different hydric conditions using hydrotime model parameters (hydrotime, mean base water potential and its standard deviation). We estimated the mean base water potential for F. pallescens (psi b((50))=- 2.79 +/- 0.45 MPa), which did not differ significantly between populations. However, the hydrotime parameter (theta (H)) varied markedly, suggesting physiological adaptation to local environments. Higher values of theta (H) were found in populations located at the extremes of the distribution gradient, indicating that germination may be prevented or delayed in conditions that are suboptimal for the species. Since the variation in hydrotime model parameters did not follow a cline, micro-environmental cues may have the greatest influence on the physiological behavior of the species, rather than the macroscale rainfall gradient.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000657522700027
WOS关键词	SEED-GERMINATION ; HYDROTHERMAL TIME ; THRESHOLD MODELS ; SOIL-MOISTURE ; TEMPERATURE ; STRESS ; POTENTIALS ; DYNAMICS ; DESERT ; L.
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351741
作者单位	[Lopez, Aldana S.; Arana, M. V.; Marchelli, P.] INTA, CONICET, IFAB Inst Invest Forestales & Agr Bariloche, Modesta Victoria 4450, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina; [Lopez, D. R.] INTA, Cordoba, Argentina; [Batlla, D.] Univ Buenos Aires, Fac Agron, IFEVA, Catedra Cerealicultura, Ave San Martin 4453,C1417DSE, Buenos Aires, DF, Argentina
推荐引用方式 GB/T 7714	Lopez, Aldana S.,Lopez, D. R.,Arana, M. V.,et al. Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters[J],2021,11(1).
APA	Lopez, Aldana S.,Lopez, D. R.,Arana, M. V.,Batlla, D.,&Marchelli, P..(2021).Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters.SCIENTIFIC REPORTS,11(1).
MLA	Lopez, Aldana S.,et al."Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters".SCIENTIFIC REPORTS 11.1(2021).