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Publication Type J
Authors Estrelles, E., E. Biondi, M. Galie, F. Mainardi, A. Hurtado and P. Soriano
Title Aridity level, rainfall pattern and soil features as key factors in germination strategies in salt-affected plant communities
Source Journal of Arid Environments
Author Keywords Halophytic habitats Aridity Rainfall pattern Soil features Germination ecophysiology Osmopriming effect SEED-GERMINATION HALOCNEMUM-STROBILACEUM SOUTHEASTERN SPAIN SALINITY GROWTH TEMPERATURE HALOPHYTE ESTABLISHMENT LIGHT CHENOPODIACEAE
Abstract In arid environments, particularly in halophytic habitats, germination ecophysiology is strongly affected by environmental factors, primarily water availability, which is influenced by quantity and seasonal distribution of precipitation and soil properties. The aim of this paper was to demonstrate that water availability is essential for the control of germination and the response of seedlings growing in saline areas. With this approach, we compared the germination strategies in two Halocnemum populations with contrasting rainfall regimes and soil aridity. The germination behavior and radicle growth under various temperature regimes, light conditions and salinity levels were evaluated. Differences were found for all parameters between the populations. Seeds from the drier Mediterranean population exhibited common opportunistic behavior and germinated in a wide range of conditions, whereas germination in the Temperate population preferred conditions with light and was restricted to alternating temperatures, adaptations to temporary waterlogged environments. This restriction was eliminated when seeds were previously exposed to high salt concentrations, which confirmed an osmopriming effect. Based on our results, the development of global conservation plans for species with large distributions is not recommended. Successful management plans for threatened habitats should consider single populations and the reproductive strategies that developed in response to local environmental conditions. (C) 2015 Elsevier Ltd. All rights reserved.
Author Address [Estrelles, E.; Soriano, P.] Univ Valencia, ICBiBE Bot Garden, Valencia 46008, Spain. [Biondi, E.; Galie, M.; Mainardi, F.] Polytech Univ Marche, Germpasm Bank Ex Situ Conservat Anfiadriat Plant, Dept Agr Food & Environm Sci, I-60131 Ancona, Italy. [Hurtado, A.] Univ Valencia, Dept Expt & Social Sci Educ, Valencia 46022, Spain. Soriano, P (reprint author), Univ Valencia, ICBiBE Bot Garden, Quart 80, Valencia 46008, Spain. pilar.soriano@uv.es
ISSN 0140-1963
ISBN 0140-1963
29-Character Source Abbreviation J. Arid. Environ.
Publication Date Jun
Year Published 2015
Volume 117
Beginning Page 1-9
Digital Object Identifier (DOI) 10.1016/j.jaridenv.2015.02.005
Unique Article Identifier WOS:000351559200001
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