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dc.creatorThormählen, Inaes
dc.creatorMeitzel, Tobiases
dc.creatorGroysman, Juliaes
dc.creatorNaranjo Río-Miranda, Belénes
dc.creatorCejudo Fernández, Francisco Javieres
dc.date.accessioned2018-01-11T12:02:09Z
dc.date.available2018-01-11T12:02:09Z
dc.date.issued2015
dc.identifier.citationThormählen, I., Meitzel, T., Groysman, J., Naranjo Rio-Miranda, B. y Cejudo Fernández, F.J. (2015). Thioredoxin f1 and NADPH-dependent thioredoxin reductase C have overlapping functions in regulating photosynthetic metabolism and plant growth in response to varying light conditions. Plant Physiology, 169 (3), 1766-1786.
dc.identifier.issn0032-0889es
dc.identifier.urihttp://hdl.handle.net/11441/68771
dc.description.abstractTwo different thiol-redox-systems exist in plant chloroplasts, the ferredoxin-thioredoxin system, which depends of ferredoxin reduced by the photosynthetic electron-transport chain and, thus, of light, and the NADPH-dependent thioredoxin reductase C (NTRC) system, which relies on NADPH and thus may be linked to sugar metabolism in the dark. Previous studies suggested therefore that the two different systems may have different functions in plants. We now report that there is a previously unrecognized functional redundancy of thioredoxin-f1 and NTRC in regulating photosynthetic metabolism and growth. In Arabidopsis mutants, combined - but not single - deficiencies of thioredoxin-f1 and NTRC led to severe growth inhibition and perturbed light acclimation, accompanied by strong impairments of Calvin-Benson-cycle activity and starch accumulation. Light-activation of key-enzymes of these pathways, fructose-1,6-bisphosphatase and ADP-glucose pyrophosphorylase, was almost completely abolished. The subsequent increase in NADPH/NADP+ and ATP/ADP ratios led to increased nitrogen assimilation, NADP-malate dehydrogenase activation and light-vulnerability of photosystem I core-proteins. In an additional approach, reporter studies show that Trx f1 and NTRC proteins are both co-localized in the same chloroplast substructure. Results provide genetic evidence that light and NADPH dependent thiol-redox systems interact at the level of thioredoxin-f1 and NTRC to coordinately participate in the regulation of Calvin-Benson-cycle, starch metabolism and growth in response to varying light conditions.es
dc.formatapplication/pdfes
dc.language.isoenges
dc.publisherAmerican Society of Plant Biologistses
dc.relation.ispartofPlant Physiology, 169 (3), 1766-1786.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleThioredoxin f1 and NADPH-dependent thioredoxin reductase C have overlapping functions in regulating photosynthetic metabolism and plant growth in response to varying light conditionses
dc.typeinfo:eu-repo/semantics/articlees
dcterms.identifierhttps://ror.org/03yxnpp24
dc.type.versioninfo:eu-repo/semantics/submittedVersiones
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Moleculares
dc.relation.publisherversionhttp://dx.doi.org/10.1104/pp.15.01122es
dc.identifier.doi10.1104/pp.15.01122es
idus.format.extent20es
dc.journaltitlePlant Physiologyes
dc.publication.volumen169es
dc.publication.issue3es
dc.publication.initialPage1766es
dc.publication.endPage1786es

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