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Enzymatic and non-enzymatic antioxidant responses of young tomato plants (cv. micro-tom) to single and combined mild nitrogen and water deficit: not the sum of the parts

2023-02-04Journal article Open access
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dc.contributor.authorMachado, Joana
dc.contributor.authorVasconcelos, Marta W.
dc.contributor.authorSoares, Cristiano
dc.contributor.authorFidalgo, Fernanda
dc.contributor.authorHeuvelink, Ep
dc.contributor.authorCarvalho, Susana M. P.
dc.date.accessioned2023-03-14T10:18:33Z
dc.date.available2023-03-14T10:18:33Z
dc.date.issued2023-02-04
dc.description.abstractThis study aims to perform a broad analysis of the antioxidant (AOX) responses of young tomato plants exposed to single and combined mild nitrogen (N) and water deficits through the evaluation of oxidative biomarkers, non-enzymatic and enzymatic AOX components. ‘Micro-Tom’ seedlings were subjected to four treatments: control (CTR; 100%N + 100%W), N deficit (N; 50%N), water deficit (W; 50%W), and combined deficits (N + W; 50%N + 50%W). An enhancement of several non-enzymatic and enzymatic components was found in plants subjected to N + W deficit, which presented higher anthocyanins accumulation (up to 103%) as well as higher levels of superoxide dismutase (SOD) transcripts at root level and of ascorbate peroxidase (APX) and catalase (CAT) transcripts at shoot level. This increase in the gene expression was also translated in augmented SOD (up to 202%), APX (up to 155%) and CAT (up to 108%) activity compared to CTR plants and the single deficits. Overall, tomato plants were able to employ defense strategies to cope with this combined deficit, as demonstrated by the higher total AOX capacity (up to 87%) compared to the single deficits, which contributed to the maintenance of their redox homeostasis, with unchanged values of lipid peroxidation and hydrogen peroxide compared with CTR plants.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/antiox12020375pt_PT
dc.identifier.eid85149214621
dc.identifier.issn2076-3921
dc.identifier.pmcPMC9951916
dc.identifier.pmid36829934
dc.identifier.urihttp://hdl.handle.net/10400.14/40558
dc.identifier.wos000938618500001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCombined abiotic stressespt_PT
dc.subjectEnzymatic componentspt_PT
dc.subjectMicro-tom cvpt_PT
dc.subjectNon-enzymatic componentspt_PT
dc.subjectOxidative stress biomarkerspt_PT
dc.titleEnzymatic and non-enzymatic antioxidant responses of young tomato plants (cv. micro-tom) to single and combined mild nitrogen and water deficit: not the sum of the partspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue2pt_PT
oaire.citation.titleAntioxidantspt_PT
oaire.citation.volume12pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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