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Influence of enhanced temperature on photosynthesis, photooxidative damage, and antioxidant strategies in Ceratonia siliqua L. seedlings subjected to water deficit and rewatering

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dc.contributor.authorOsório, Maria Leonor
dc.contributor.authorOsório, Júlio
dc.contributor.authorVieira, Ana
dc.contributor.authorGonçalves, Sandra
dc.contributor.authorRomano, Anabela
dc.date.accessioned2013-03-14T11:41:59Z
dc.date.available2013-03-14T11:41:59Z
dc.date.issued2011
dc.description.abstractPredicted future climatic changes for the Mediterranean region give additional importance to the study of photooxidative stress in local economic species subjected to combined drought and high-temperature conditions. Under this context, the impact of these stresses on photosynthesis, energy partitioning, and membrane lipids, as well as the potential ability to attenuate oxidative damage, were investigated in Ceratonia siliqua L. Two thermal regimes (LT: 25/18ºC; HT: 32/21ºC) and three soil water conditions (control, water stress, and rewetting) were considered. HT exacerbated the adverse effects of water shortage on photosynthetic rates (PN) and PSII function. The decrease in PN was 33% at LT whereas at HT it was 84%. In spite of this, the electron transport rate (ETR) was not affected, which points to an increased allocation of reductants to sinks other than CO2 assimilation. Under LT conditions, water stress had no significant effects on yield of PSII photochemistry (ΦPSII) and yields of regulated (ΦNPQ) and nonregulated (ΦNO) energy dissipation. Conversely, drought induced a significant decrease of ΦPSII and a concomitant increase of ΦNO in HT plants, thereby favouring the overproduction of reactive oxygen species (ROS). Moreover, signs of lipid peroxidation damage were detected in HT plants, in which drought caused an increase of 40% in malondialdehyde (MDA) content. Concurrently, a marked increase in proline content was observed, while the activities of catalase (CAT) and ascorbate peroxidase (APX) were unaffected. Despite the generation of a moderate oxidative stress response, C. siliqua revealed a great capability for photosynthetic recovery 36 h after rewatering, which suggests that the species can cope with predicted climate change.por
dc.description.sponsorshipThis work was supported by a grant from Portuguese Foundation for Science and Technology (FCT) to MLO: SFRH/BPD/35410/2007.por
dc.identifier.citationOsório M. L., Osório J., Vieira A., Gonçalves S., Romano A. 2011. Influence of enhanced temperature on photosynthesis, photooxidative damage and antioxidant strategies in Ceratonia siliqua L. seedlings subjected to water deficit and re-watering, Photosynthetica 49: 3-12por
dc.identifier.issn0300-3604
dc.identifier.otherAUT: JOS01477; ARO01015;
dc.identifier.urihttp://hdl.handle.net/10400.1/2576
dc.language.isoengpor
dc.peerreviewedyespor
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2Fs11099-011-0001-7?LI=truepor
dc.subjectAntioxidative protectionpor
dc.subjectCarob treepor
dc.subjectEnergy partitioningpor
dc.subjectLipid peroxidationpor
dc.subjectProlinepor
dc.titleInfluence of enhanced temperature on photosynthesis, photooxidative damage, and antioxidant strategies in Ceratonia siliqua L. seedlings subjected to water deficit and rewateringpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage12por
oaire.citation.issue1por
oaire.citation.startPage3por
oaire.citation.titlePhotosyntheticapor
oaire.citation.volume49por
person.familyNameOsório
person.familyNameOsório
person.familyNameVieira
person.familyNameGonçalves
person.familyNameRomano
person.givenNameMaria Leonor
person.givenNameJúlio
person.givenNameAna
person.givenNameSandra
person.givenNameAnabela
person.identifier.ciencia-id9F19-E3AE-2C59
person.identifier.ciencia-id8A18-7E9A-3B0E
person.identifier.orcid0000-0002-7713-6497
person.identifier.orcid0000-0002-4054-4091
person.identifier.orcid0000-0001-7637-4912
person.identifier.orcid0000-0002-3038-4434
person.identifier.orcid0000-0002-7204-7428
person.identifier.ridM-6988-2017
person.identifier.scopus-author-id7006394339
person.identifier.scopus-author-id9938818600
person.identifier.scopus-author-id8583003200
person.identifier.scopus-author-id56249997600
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
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relation.isAuthorOfPublication.latestForDiscoverya8b335b2-45cc-4578-89b0-153273014280

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