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Publication Type J
Authors Casolo, V., M. Tomasella, V. De Col, E. Braidot, T. Savi and A. Nardini
Title Water relations of an invasive halophyte (Spartina patens): osmoregulation and ionic effects on xylem hydraulics
Source Functional Plant Biology
Author Keywords biomass invasive plants leaf hydraulics nitrogen osmotic potential phenotypic plasticity LEAF TRAIT RELATIONSHIPS PHENOTYPIC PLASTICITY GLOBAL METAANALYSIS ALTERNIFLORA LOISEL PLANT DIVERSITY USE EFFICIENCY SALT-MARSHES ALIEN PLANTS CONDUCTANCE SALINITY
Abstract Spartina patens (Ait.) Muhl. is a grass native to the Atlantic coastal area of North America currently invading salt marsh ecosystems in several regions of Europe. We investigated leaf water relations and hydraulics, gas exchange, nitrogen and starch content in two populations of S. patens growing under contrasting salinity levels in a salt marsh and in a dune system in order to assess its functional plasticity as a factor contributing to its invasive potential. The analysis of leaf water relations revealed a suite of mechanisms adopted by S. patens to overcome salt and drought stress while maintaining relatively invariant leaf morphological traits and plant biomass. In particular, salt marsh plants experiencing severe water stress underwent greater osmoregulation and leaf hydraulic adjustment than dune plants. We also present the first experimental evidence for salt-mediated regulation of xylem hydraulic efficiency in a halophytic grass and suggest that it is an important functional trait allowing plants growing in saline habitats to cope with a restricted water supply. The functional plasticity of leaf water relations and xylem hydraulics emerges as a key trait underlying the competitive ability and invasive potential of S. patens.
Author Address [Casolo, Valentino; Tomasella, Martina; De Col, Valentina; Braidot, Enrico] Univ Udine, Dept Agr & Environm Sci, I-33100 Udine, Italy. [Tomasella, Martina] Tech Univ Munich, Dept Ecol, D-85354 Freising Weihenstephan, Germany. [Tomasella, Martina; Savi, Tadeja; Nardini, Andrea] Univ Trieste, Dept Life Sci, I-34127 Trieste, Italy. Nardini, A (reprint author), Univ Trieste, Dept Life Sci, Via L Giorgieri 10, I-34127 Trieste, Italy. nardini@units.it
ISSN 1445-4408
ISBN 1445-4408
29-Character Source Abbreviation Funct. Plant Biol.
Year Published 2015
Volume 42
Issue 3
Beginning Page 264-273
Digital Object Identifier (DOI) 10.1071/fp14172
Unique Article Identifier WOS:000349635900005
Plants associated with this reference

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