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Photosynthetic activity of cotyledons is critical during post-germinative growth and seedling establishment


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dc.creator Ojeda, Valle es
dc.creator Armario Nájera, María Victoria es
dc.creator González García, María de la Cruz es
dc.creator Pérez Ruiz, Juan Manuel es 2017-10-27T14:14:17Z 2017-10-27T14:14:17Z 2017
dc.identifier.citation Ojeda, V., Armario Nájera, M.V., González García, M.C. y Pérez Ruiz, J.M. (2017). Photosynthetic activity of cotyledons is critical during post-germinative growth and seedling establishment. Plant Signaling and Behavior, 12 (9), 1-3.
dc.identifier.issn 1559-2316 es
dc.description.abstract Thioredoxins (Trxs) play a relevant role in thiol-dependent redox regulation, which allows the rapid adaptation of chloroplast metabolism to unpredictable environmental conditions. In chloroplasts, Trxs use reducing equivalents provided by photoreduced ferredoxin (Fdx) via the action of a ferredoxin-thioredoxin reductase (FTR), thus linking redox regulation to light. In addition, these organelles contain an NADPH-thioredoxin reductase, NTRC, with a Trx domain at the C-terminus. NTRC efficiently reduces 2-Cys peroxiredoxins (Prxs), hence having antioxidant function. However, NTRC also participates in the redox regulation of processes, such as starch and chlorophyll biosynthesis, which are known to be regulated by Trxs. Thus, the question arising is whether there is a cross-talk between the 2 redox systems. Arabidopsis mutants simultaneously devoid of NTRC and Trx x or Trxs f show a dramatic growth inhibition phenotype, indicating that NTRC is required for the function of these unrelated Trxs. Remarkably, both the ntrc-trxx double mutant and, to a higher extent, the ntrc-trxf1f2 triple mutant show high mortality at the seedling stage, which is rescued by sucrose. These findings show the relevant role of redox regulation for chloroplast performance and uncover the key function of cotyledons chloroplasts at the transition to autotrophic metabolism during seedling establishment. es
dc.format application/pdf es
dc.language.iso eng es
dc.publisher Taylor & Francis es
dc.relation.ispartof Plant Signaling and Behavior, 12 (9), 1-3.
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 Internacional *
dc.rights.uri *
dc.subject Chloroplast es
dc.subject NTRC es
dc.subject redox regulation es
dc.subject seedling es
dc.subject thioredoxin es
dc.title Photosynthetic activity of cotyledons is critical during post-germinative growth and seedling establishment es
dc.type info:eu-repo/semantics/article es
dc.type.version info:eu-repo/semantics/publishedVersion es
dc.rights.accessrights info:eu-repo/semantics/openAccess es
dc.contributor.affiliation Universidad de Sevilla. Departamento de Bioquímica y Biología Molecular es
dc.relation.publisherversion es
dc.identifier.doi 10.1080/15592324.2017.1347244 es
idus.format.extent 3 p. es
dc.journaltitle Plant Signaling and Behavior es
dc.publication.volumen 12 es
dc.publication.issue 9 es
dc.publication.initialPage 1 es
dc.publication.endPage 3 es
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