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Disentangling the effect of atmospheric CO2 enrichment on the halophyte Salicornia ramosissima J. Woods physiological performance under optimal and suboptimal saline conditions

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dc.contributor.authorPérez-Romero, Jesús Alberto
dc.contributor.authorIdaszkin, Yanina Lorena
dc.contributor.authorBarcia-Piedras, Jose-Maria
dc.contributor.authorDuarte, Bernardo
dc.contributor.authorRedondo-Gómez, Susana
dc.contributor.authorCaçador, Isabel
dc.contributor.authorMateos-Naranjo, Enrique
dc.date.accessioned2019-06-25T10:43:42Z
dc.date.available2019-06-25T10:43:42Z
dc.date.issued2018
dc.description.abstractA mesocosm experiment was designed to assess the effect of atmospheric CO2 increment on the salinity tolerance of the C3 halophyte Salicornia ramosissima. Thus, the combined effect of 400 ppm and 700 ppm CO2 at 0, 171 and 510 mM NaCl on plants growth, gas exchange, chlorophyll fluorescence parameters, pigments profiles, antioxidative enzyme activities and water relations was studied. Our results highlighted a positive effect of atmospheric CO2 increment on plant physiological performance under suboptimal salinity concentration (510 mM NaCl). Thus, we recorded higher net photosynthetic rate (AN) values under saline conditions and 700 ppm CO2, being this effect mainly mediated by a reduction of mesophyll (gm) and biochemical limitation imposed to salt excess. In addition, rising atmospheric CO2 led to a better plant water balance, linked with a reduction of stomatal conductante (gs) and an overall increment of osmotic potential (Ѱo) with NaCl concentration increment. In spite of these positive effects, there were no significant biomass variations between any treatments. Being this fact ascribed by the investment of the higher energy fixed for salinity stress defence mechanisms, which allowed plants to maintain more active the photochemical machinery even at high salinities, reducing the risk of ROS production, as indicated an improvement of the electron flux and a rise of the energy dissipation. Finally, the positive effect of the CO2 was also supported by the modulation of pigments profiles (mainly zeaxhantin and violaxhantin) concentrations and anti-oxidative stress enzymes, such as superoxide dismutase (SOD) and ascorbate peroxidase (APx).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.plaphy.2018.04.041pt_PT
dc.identifier.issn0981-9428
dc.identifier.urihttp://hdl.handle.net/10451/38808
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectAtmospheric CO2 enrichmentpt_PT
dc.subjectClimate changept_PT
dc.subjectHalophytept_PT
dc.subjectGas exchangept_PT
dc.subjectChlorophyll fluorescencept_PT
dc.subjectSalinitypt_PT
dc.titleDisentangling the effect of atmospheric CO2 enrichment on the halophyte Salicornia ramosissima J. Woods physiological performance under optimal and suboptimal saline conditionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage629pt_PT
oaire.citation.startPage617pt_PT
oaire.citation.titlePlant Physiology and Biochemistrypt_PT
oaire.citation.volume127pt_PT
person.familyNameDuarte
person.familyNameCaçador
person.givenNameBernardo
person.givenNameIsabel
person.identifier89449
person.identifier.ciencia-id731E-093F-D4C8
person.identifier.ciencia-id631C-9FFE-CA81
person.identifier.orcid0000-0003-1914-7435
person.identifier.orcid0000-0002-4475-6091
person.identifier.ridH-2001-2011
person.identifier.ridC-2618-2012
person.identifier.scopus-author-id20734149900
person.identifier.scopus-author-id6602533871
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa72f0f40-c224-49ad-ba21-ebb5f9aab09c
relation.isAuthorOfPublication02ecb390-88b9-4e2f-8690-eba66c3b5311
relation.isAuthorOfPublication.latestForDiscoverya72f0f40-c224-49ad-ba21-ebb5f9aab09c

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