Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/5542
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dc.contributor.authorMonteiro, M. S.pt
dc.contributor.authorSantos, C.pt
dc.contributor.authorSoares, A. M. V. M.pt
dc.contributor.authorMann, R. M.pt
dc.date.accessioned2012-01-27T15:25:38Z-
dc.date.issued2009-
dc.identifier.issn0147-6513pt
dc.identifier.urihttp://hdl.handle.net/10773/5542-
dc.description.abstractLaboratory and field studies have provided encouraging insights into the capacity of plants to act as biomonitors of environmental quality through the use of biomarkers. However, a better understanding of the overall process of Cd-induced senescence, describing the cascade of Cd effects in plants is needed for a selection of relevant biomarkers of Cd stress. In order to approach this, 5-week old Lactuca sativa L. were exposed for 14 days to 100 mu M Cd(NO(3))(2) and harvested at days 0, 1, 3, 7 and 14. The parameters measured included classical endpoints (shoot and root growth) and biochemical endpoints related to photosynthesis, nutrients content, and oxidative stress. Cadmium-exposed plants displayed nutrient imbalances in leaves and roots. Photosynthetic efficiency was significantly decreased and lipid peroxidation was enhanced. Antioxidant enzymes were significantly altered during exposure-catalase was inhibited by the end of exposure and peroxidase was induced at day 1 in young leaves. These alterations culminated in a decrease in shoot growth after 14-days exposure to Cd. Biochemical alterations could be used in integrative approaches with classical endpoints in ecotoxicological tests for Cd and after further testing in real scenarios conditions, they could form the basis of a plant biomarkers battery for monitoring and predicting early effects of exposure to Cd. (c) 2008 Elsevier Inc. All rights reserved.pt
dc.description.sponsorshipFCT/POCTI/ BSE/48757/2002pt
dc.description.sponsorshipFCT/SFRH/BD/17491/2004pt
dc.description.sponsorshipFCT/SFRH/BPD/8348/2002pt
dc.language.isoengpt
dc.publisherElsevierpt
dc.rightsrestrictedAccesspor
dc.subjectChlorophyll contentpt
dc.subjectLactuca sativapt
dc.subjectLipid peroxidationpt
dc.subjectMetalpt
dc.subjectNutrient imbalancespt
dc.subjectOxidative stresspt
dc.subjectPSII efficiencypt
dc.titleAssessment of biomarkers of cadmium stress in lettucept
dc.typearticlept
dc.peerreviewedyespt
ua.distributioninternationalpt
degois.publication.firstPage811pt
degois.publication.issue3
degois.publication.issue3pt
degois.publication.lastPage818pt
degois.publication.titleEcotoxicology and Environmental Safetypt
degois.publication.volume72pt
dc.date.embargo10000-01-01-
dc.identifier.doi10.1016/j.ecoenv.2008.08.002*
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