Root based responses account for Psidium guajava survival at high nickel concentration (Articolo in rivista)

Type
Label
  • Root based responses account for Psidium guajava survival at high nickel concentration (Articolo in rivista) (literal)
Anno
  • 2015-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jplph.2014.10.011 (literal)
Alternative label
  • N. Bazihizina, M. Redwan, C. Taiti, C. Giordano, E. Monetti, E. Masi, E. Azzarello, S. Mancuso (2015)
    Root based responses account for Psidium guajava survival at high nickel concentration
    in Physiologia plantarum (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • N. Bazihizina, M. Redwan, C. Taiti, C. Giordano, E. Monetti, E. Masi, E. Azzarello, S. Mancuso (literal)
Pagina inizio
  • 137 (literal)
Pagina fine
  • 146 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 174 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Agrifood Production and Environmental Sciences-University of Florence, Viale delle Idee 30, 50019 Sesto F.no, Florence, Italy (literal)
Titolo
  • Root based responses account for Psidium guajava survival at high nickel concentration (literal)
Abstract
  • The presence of Psidium guajava in polluted environments has been reported in recent studies, suggesting that this species has a high tolerance to the metal stress. The present study aims at a physiological characterization of P. guajava response to high nickel (Ni) concentrations in the root-zone. Three hydroponic experiments were carried out to characterize the effects of toxic Ni concentrations on morphological and physiological parameters of P. guajava, focusing on Ni-induced damages at the root-level and root ion fluxes. With up to 300 ?M NiSO4 in the root-zone, plant growth was similar to that in control plants, whereas at concentrations higher than 1000 ?M NiSO4 there was a progressive decline in plant growth and leaf gas exchange parameters; this occurred despite, at all considered concentrations, plants limited Ni2+ translocation to the shoot, therefore avoiding shoot Ni2+ toxicity symptoms. Maintenance of plant growth with 300 ?M Ni2+ was associated with the ability to retain K+ in the roots meanwhile 1000 and 3000 ?M NiSO4 led to substantial K+ losses. In this study, root responses mirror all plant performances suggesting a direct link between root functionality and Ni2+ tolerance mechanisms and plant survival. Considering that Ni was mainly accumulated in the root system, the potential use of P. guajava for Ni2+ phytoextraction in metal-polluted soils is limited; nevertheless, the observed physiological changes indicate a good Ni2+ tolerance up to 300 ?M NiSO4 suggesting a potential role for the phytostabilization of polluted soils (literal)
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