Consequences of salt stress on diffusive resistances, rubisco, electron transport and anatomy of spinach leaves (Articolo in rivista)

Type
Label
  • Consequences of salt stress on diffusive resistances, rubisco, electron transport and anatomy of spinach leaves (Articolo in rivista) (literal)
Anno
  • 1998-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1071/PP97161 (literal)
Alternative label
  • Delfine S.1, Alvino A.1, Zacchini M.2, Loreto F.2 (1998)
    Consequences of salt stress on diffusive resistances, rubisco, electron transport and anatomy of spinach leaves
    in Australian journal of plant physiology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Delfine S.1, Alvino A.1, Zacchini M.2, Loreto F.2 (literal)
Pagina inizio
  • 395 (literal)
Pagina fine
  • 402 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Il nome attuale della rivista è Functional Plant Biology ISSN: 1445-4408 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 25 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1Dipartimento SAVA UniMolise 2 IBEV-CNR (literal)
Titolo
  • Consequences of salt stress on diffusive resistances, rubisco, electron transport and anatomy of spinach leaves (literal)
Abstract
  • Spinach (Spinacia oleracea L.) leaves stressed by irrigation with water containing 1% (w/v) NaCl for 20 days had low conductance to CO2 diffusion both at the stomata and in the mesophyll. Mesophyll anatomy changed in salt-stressed leaves, which could have accounted for the decreased mesophyll conductance. Ribulose 1,5-bisphosphate carboxylase/oxygenase in vitro activity and content were not affected by up to 20 days exposure to salinity but decreased when leaves were exposed to salt stress for longer than 20 days. Salt accumulation also caused a drop of Ca and Mg which might have decreased membrane stability and chlorophyll content, respectively. Measurements of chlorophyll fluorescence indicated that the 20-day-long salt stress did not directly affect photochemistry. We conclude that salinity reduces photosynthesis primarily by reducing the diffusion of CO2 to the chloroplast, both by stomatal closure and by changes in mesophyll structure which decreases the conductance to CO2 diffusion within the leaf. The capacity for carbon metabolism is eventually reduced but that occurs after substantial decreases in the conductance to CO2 diffusion. (literal)
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