Responses to changes in Ca2+ supply in two Mediterranean evergreens, Phillyra latifolia and Ca2+ Pistacia lentiscus, during salinity stress and subsequent relief. (Articolo in rivista)

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  • Responses to changes in Ca2+ supply in two Mediterranean evergreens, Phillyra latifolia and Ca2+ Pistacia lentiscus, during salinity stress and subsequent relief. (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1093/aob/mcn134 (literal)
Alternative label
  • TATTINI M.; TRAVERSI M.L. (2008)
    Responses to changes in Ca2+ supply in two Mediterranean evergreens, Phillyra latifolia and Ca2+ Pistacia lentiscus, during salinity stress and subsequent relief.
    in Annals of botany (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • TATTINI M.; TRAVERSI M.L. (literal)
Pagina inizio
  • 609 (literal)
Pagina fine
  • 622 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 102 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Massimiliano Tattini- Istituto per la protezione delle piante Maria Laura Traversi- Istituto per la valorizzazione del legno e delle specie arboree (literal)
Titolo
  • Responses to changes in Ca2+ supply in two Mediterranean evergreens, Phillyra latifolia and Ca2+ Pistacia lentiscus, during salinity stress and subsequent relief. (literal)
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. (literal)
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