Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/190068
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

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

AuthorsOjeda, Valle; Nájera, Victoria A.; González, Maricruz CSIC ORCID ; Pérez-Ruiz, Juan Manuel CSIC ; Cejudo, Francisco Javier CSIC ORCID
KeywordsThioredoxin
Seedling
Redox regulation
NTRC
Chloroplast
Issue Date21-Sep-2017
PublisherTaylor & Francis
CitationPlant Signaling and Behavior 12(9): e1347244 (2017)
AbstractThioredoxins (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.
Publisher version (URL)https://doi.org/10.1080/15592324.2017.1347244
URIhttp://hdl.handle.net/10261/190068
DOI10.1080/15592324.2017.1347244
ISSN1559-2316
E-ISSN1559-2324
Appears in Collections:(IBVF) Artículos

Files in This Item:
File Description SizeFormat
photosynthetic_activity_cotyledons_critical.pdf1,2 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work

SCOPUSTM   
Citations

2
checked on Jan 21, 2022

WEB OF SCIENCETM
Citations

2
checked on Jan 25, 2022

Page view(s)

162
checked on Jan 24, 2022

Download(s)

101
checked on Jan 24, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.