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Ecophysiological constraints of Aster tripolium under extreme thermal events impacts: Merging biophysical, biochemical and genetic insights

2015Journal article Restricted access
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dc.contributor.authorDuarte, Bernardo
dc.contributor.authorGoessling, J.W.
dc.contributor.authorMarques, J. C.
dc.contributor.authorCaçador, Isabel
dc.date.accessioned2020-01-19T18:19:21Z
dc.date.available2020-01-19T18:19:21Z
dc.date.issued2015
dc.description.abstractCold and heat waves are phenomenon that occurs in higher frequency and intensity due to global climate changes. Commonly cultivated crop species are crucially affected by extreme weather events, and therefore alternative crops - such as halophytes - gain in agricultural interest. While halophytes are potentially able to cope with temperature extremes on the long term exposure, effects of temporary events such as cold and heat waves are not yet described. In order to unveil the effects of these altered thermal environments, Aster tripolium plants were subjected to cold (9/5 °C) and heat (42/38 °C) waves regimes during 3 days and its photochemical and biochemical traits evaluated. In the potential cash crop A. tripolium cold waves induced the gene expression of dehydrins in order to counteract desiccation and thus to prevent oxidative stress. Regulatory proteins on the RNA maturation level (Maturase K) were highly expressed. Heat stress induced the gene expression of the cystein protease gene; most likely to degrade misfolded proteins temporary. Both thermal treatments decreased the photosynthetic efficiency and capacity, driven by a loss in the connectivity between PSII antennae. Nevertheless the light absorption capacity was unaffected due to an increased RC closure net rate. Cold wave-treated individuals showed a decrease in the carotenoid pigmentation, except auroxanthin. In cold wave treated individuals the overall peroxidase activity was significantly increased. Data suggest that exposure to both, cold and heat wave treatment decreased the ecophysiological capacity of A. tripolium.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.plaphy.2015.10.015pt_PT
dc.identifier.issn0981-9428
dc.identifier.urihttp://hdl.handle.net/10451/41063
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.subjectClimate Changept_PT
dc.subjectHalophytespt_PT
dc.subjectCold wavespt_PT
dc.subjectHeat wavespt_PT
dc.subjectEcophysiologypt_PT
dc.subjectGene expressionpt_PT
dc.titleEcophysiological constraints of Aster tripolium under extreme thermal events impacts: Merging biophysical, biochemical and genetic insightspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage228pt_PT
oaire.citation.startPage217pt_PT
oaire.citation.titlePlant Physiology and Biochemistrypt_PT
oaire.citation.volume97pt_PT
person.familyNameDuarte
person.familyNameMARQUES
person.familyNameCaçador
person.givenNameBernardo
person.givenNameJOÃO CARLOS
person.givenNameIsabel
person.identifier89449
person.identifier134821
person.identifier.ciencia-id731E-093F-D4C8
person.identifier.ciencia-id9F11-7A1E-BEEC
person.identifier.ciencia-id631C-9FFE-CA81
person.identifier.orcid0000-0003-1914-7435
person.identifier.orcid0000-0001-8865-8189
person.identifier.orcid0000-0002-4475-6091
person.identifier.ridH-2001-2011
person.identifier.ridL-9478-2014
person.identifier.ridC-2618-2012
person.identifier.scopus-author-id20734149900
person.identifier.scopus-author-id7203032961
person.identifier.scopus-author-id6602533871
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa72f0f40-c224-49ad-ba21-ebb5f9aab09c
relation.isAuthorOfPublication97130a55-0383-4d1b-8d73-4a5ca889e529
relation.isAuthorOfPublication02ecb390-88b9-4e2f-8690-eba66c3b5311
relation.isAuthorOfPublication.latestForDiscovery02ecb390-88b9-4e2f-8690-eba66c3b5311

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