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Disentangling the photochemical salinity tolerance in Aster tripolium L.: connecting biophysical traits with changes in fatty acid composition

2017Journal article Restricted access
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dc.contributor.authorDuarte, Bernardo
dc.contributor.authorCabrita, M. T.
dc.contributor.authorGameiro, Carla
dc.contributor.authorMatos, A. R.
dc.contributor.authorGodinho, R.
dc.contributor.authorMarques, J. C.
dc.contributor.authorCaçador, Isabel
dc.date.accessioned2019-06-07T10:13:04Z
dc.date.available2019-06-07T10:13:04Z
dc.date.issued2017
dc.description.abstractA profound analysis of A. tripolium photochemical traits under salinity exposure is lacking in the literature, with very few references focusing on its fatty acid profile role in photophysiology. To address this, the deep photochemical processes were evaluated by Pulse Amplitude Modulated (PAM) Fluorometry coupled with a discrimination of its leaf fatty acid profile. Plants exposed to 125-250 mm NaCl showed higher photochemical light harvesting efficiencies and lower energy dissipation rates. under higher NaCl exposure, there is evident damage of the oxygen evolving complexes (OECs). On the other hand, Reaction Centre (RC) closure net rate and density increased, improving the energy fluxes entering the PS II, in spite of the high amounts of energy dissipated and the loss of PS II antennae connectivity. Energy dissipation was mainly achieved through the auroxanthin pathway. Total fatty acid content displayed a similar trend, being also higher under 125-250 mm NaCl with high levels of omega-3 and omega-6 fatty acids. The increase in oleic acid and palmitic acid allows the maintenance of the good functioning of the PS II. Also relevant was the high concentration of chloroplastic C16:1t in the individuals subjected to 125-250 mm NaCl, related with a higher electron transport activity and with the organization of the Light Harvesting Complexes (LHC) and thus reducing the activation of energy dissipation mechanisms. All these new insights shed some light not only on the photophysiology of this potential cash-crop, but also highlight its important saline agriculture applications of this species as forage and potential source of essential fatty acids.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1111/plb.12517pt_PT
dc.identifier.issn1435-8603
dc.identifier.urihttp://hdl.handle.net/10451/38503
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectfatty acidpt_PT
dc.subjecthalophytept_PT
dc.subjectphotobiologypt_PT
dc.subjectsalinept_PT
dc.subjectagriculturept_PT
dc.titleDisentangling the photochemical salinity tolerance in Aster tripolium L.: connecting biophysical traits with changes in fatty acid compositionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage248pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage239pt_PT
oaire.citation.titlePlant Biologypt_PT
oaire.citation.volume19pt_PT
person.familyNameDuarte
person.familyNameGameiro
person.familyNameMARQUES
person.familyNameCaçador
person.givenNameBernardo
person.givenNameCarla
person.givenNameJOÃO CARLOS
person.givenNameIsabel
person.identifier89449
person.identifier134821
person.identifier.ciencia-id731E-093F-D4C8
person.identifier.ciencia-id771B-9D07-AB1A
person.identifier.ciencia-id9F11-7A1E-BEEC
person.identifier.ciencia-id631C-9FFE-CA81
person.identifier.orcid0000-0003-1914-7435
person.identifier.orcid0000-0003-2396-3929
person.identifier.orcid0000-0001-8865-8189
person.identifier.orcid0000-0002-4475-6091
person.identifier.ridH-2001-2011
person.identifier.ridB-5462-2012
person.identifier.ridL-9478-2014
person.identifier.ridC-2618-2012
person.identifier.scopus-author-id20734149900
person.identifier.scopus-author-id20734253500
person.identifier.scopus-author-id7203032961
person.identifier.scopus-author-id6602533871
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa72f0f40-c224-49ad-ba21-ebb5f9aab09c
relation.isAuthorOfPublication39490eaa-c76a-4478-9ff0-844df5fb91ca
relation.isAuthorOfPublication97130a55-0383-4d1b-8d73-4a5ca889e529
relation.isAuthorOfPublication02ecb390-88b9-4e2f-8690-eba66c3b5311
relation.isAuthorOfPublication.latestForDiscovery39490eaa-c76a-4478-9ff0-844df5fb91ca

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