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Authors Tattini, M; Traversi, ML
Author Full Name Tattini, Massimiliano; Traversi, Maria Laura
Title Responses to changes in Ca2+ supply in two Mediterranean evergreens, Phillyrea latifolia and Pistacia lentiscus, during salinity stress and subsequent relief
Source ANNALS OF BOTANY
Language English
Document Type Article
Author Keywords calcium-sodium interactions; gas exchange; Na allocation; Na uptake and transport; oxidative damage; Phillyrea latifolia; Pistacia lentiscus; polyphenols; PSII photochemistry; relief from salinity; water relations
Keywords Plus LEAF WATER RELATIONS; OLEA-EUROPAEA; NACL STRESS; ANTIOXIDANT SYSTEMS; GAS-EXCHANGE; SALT STRESS; CHLOROPHYLL FLUORESCENCE; RHIZOSPHERIC CALCIUM; LIGUSTRUM-VULGARE; OLIVE CULTIVARS
Abstract Background and Aims Changes in root-zone Ca2+ concentration affect a plant's performance under high salinity, an issue poorly investigated for Mediterranean xerophytes, which may suffer from transient root-zone salinity stress in calcareous soils. It was hypothesized that high-Ca2+ supply may affect differentially the response to salinity stress of species differing in their strategy of Na+ allocation at organ level. Phillyrea latifolia and Pistacia lentiscus, which have been reported to greatly differ for Na+ uptake and transport rates to the leaves, were studied. Methods In plants exposed to 0 mM or 200 mM NaCl and supplied with 2.0 mM or 8.0 mM Ca2+, under 100% solar irradiance, measurements were conducted of (a) gas exchange, PSII photochemistry and plant growth; (b) water and ionic relations; (c) the activity of superoxide dismutase and the lipid peroxidation; and (d) the concentration of individual polyphenols. Gas exchange and plant growth were also estimated during a period of relief from salinity stress. Key Results The performance of Pistacia lentiscus decreased to a significantly smaller degree than that of Phillyrea latifolia because of high salinity. Ameliorative effects of high-Ca2+ supply were more evident in Phillyrea latifolia than in Pistacia lentiscus. High-Ca2+ reduced steeply the Na+ transport to the leaves in salt-treated Phillyrea latifolia, and allowed a faster recovery of gas exchange and growth rates as compared with low- Ca2+ plants, during the period of relief from salinity. Salt-induced biochemical adjustments, mostly devoted to counter salt-induced oxidative damage, were greater in Phillyrea latifolia than in Pistacia lentiscus. Conclusions An increased Ca2+ : Na+ ratio may be of greater benefit for Phillyrea latifolia than for Pistacia lentiscus, as in the former, adaptive mechanisms to high root-zone salinity are primarily devoted to restrict the accumulation of potentially toxic ions in sensitive shoot organs.
Author Address [Tattini, Massimiliano; Traversi, Maria Laura] CNR, Ist Valorizzaz Legno & Specie Arboree, IVALSA, I-50019 Florence, Italy
Reprint Address Tattini, M (corresponding author), CNR, Ist Valorizzaz Legno & Specie Arboree, IVALSA, Via Madonna Piano 10, I-50019 Florence, Italy.
E-mail Address m.tattini@ivalsa.cnr.it
ResearcherID Number Tattini, Massimiliano/K-1238-2019
ORCID Number Tattini, Massimiliano/0000-0001-5434-8860
Times Cited 15
Total Times Cited Count (WoS, BCI, and CSCD) 15
Publisher OXFORD UNIV PRESS
Publisher City OXFORD
Publisher Address GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN 0305-7364
29-Character Source Abbreviation ANN BOT-LONDON
ISO Source Abbreviation Ann. Bot.
Publication Date OCT
Year Published 2008
Volume 102
Issue 4
Beginning Page 609
Ending Page 622
Digital Object Identifier (DOI) 10.1093/aob/mcn134
Page Count 14
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number 350BB
Unique Article Identifier WOS:000259326300013
Plants associated with this reference

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