Photosynthetic performance and biochemical adjustments in two co-occurring Mediterranean evergreens, Quercus ilex and Arbutus unedo, differing in salt-exclusion ability (Articolo in rivista)

Type
Label
  • Photosynthetic performance and biochemical adjustments in two co-occurring Mediterranean evergreens, Quercus ilex and Arbutus unedo, differing in salt-exclusion ability (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1071/FP13241 (literal)
Alternative label
  • Fusaro L., Mereu S., Brunetti C., Di Ferdinando M., Ferrini F., Manes F., Salvatori E., Marzuoli R., Gerosa G., Tattini M. (2014)
    Photosynthetic performance and biochemical adjustments in two co-occurring Mediterranean evergreens, Quercus ilex and Arbutus unedo, differing in salt-exclusion ability
    in Functional plant biology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Fusaro L., Mereu S., Brunetti C., Di Ferdinando M., Ferrini F., Manes F., Salvatori E., Marzuoli R., Gerosa G., Tattini M. (literal)
Pagina inizio
  • 391 (literal)
Pagina fine
  • 400 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 41 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Fusaro L., Manes F., Salvatori E.; Univ Roma La Sapienza, Dept Environm Biol, I-00185 Rome, Italy; Mereu S: Univ Sassari, Dept Sci Nat & Environm Resources DipNET, I-07100 Sassari, Italy; Brunetti C., Di Ferdinando M., Ferrini F.: Univ Florence, Dept Agrifood Prod & Environm Sci, I-50019 Florence, Italy; Marzuoli R., Gerosa G.:Catholic Univ Brescia, Dept Math & Phys, I-25121 Brescia, Italy (literal)
Titolo
  • Photosynthetic performance and biochemical adjustments in two co-occurring Mediterranean evergreens, Quercus ilex and Arbutus unedo, differing in salt-exclusion ability (literal)
Abstract
  • The responses to mild root zone salinity stress were investigated in two co-occurring Mediterranean woody evergreens, Quercus ilex L. and Arbutus unedo L., which differ in morpho-anatomical traits and strategies to cope with water deficit. The aim was to explore their strategies to allocate potentially toxic ions at organism level, and the consequential physiological and biochemical adjustments. Water and ionic relations, gas exchange and PSII performance, the concentration of photosynthetic pigments, and the activity of antioxidant defences, were measured. Q. ilex displayed a greater capacity to exclude Na+ and Cl- from the leaf than A. unedo, in part as a consequence of greater reductions in transpiration rates. Salt-induced reductions in CO2 assimilation resulted in Q. ilex suffering from excess of light to a greater extent than A. unedo. Consistently, in Q. ilex effective mechanisms of nonphotochemical quenching, also sustained by the lutein epoxide-lutein cycle, operated in response to salinity stress. Q. ilex also displayed a superior capacity to detoxify reactive oxygen species (ROS) than A. unedo. Our data suggest that the ability to exclude salt from actively growing shoot organs depends on the metabolic cost of sustaining leaf construction, i.e. species-specific leaf life-span, and the relative strategies to cope with salt-induced water stress. We discuss how contrasting abilities to restrict the entry and transport of salt in sensitive organs relates with species-specific salt tolerance. (literal)
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