Growth in fluctuating light buffers plants against photorespiratory perturbations.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
03 11 2023
03 11 2023
Historique:
received:
26
04
2023
accepted:
12
10
2023
medline:
6
11
2023
pubmed:
4
11
2023
entrez:
4
11
2023
Statut:
epublish
Résumé
Photorespiration (PR) is the pathway that detoxifies the product of the oxygenation reaction of Rubisco. It has been hypothesized that in dynamic light environments, PR provides a photoprotective function. To test this hypothesis, we characterized plants with varying PR enzyme activities under fluctuating and non-fluctuating light conditions. Contrasting our expectations, growth of mutants with decreased PR enzyme levels was least affected in fluctuating light compared with wild type. Results for growth, photosynthesis and metabolites combined with thermodynamics-based flux analysis revealed two main causal factors for this unanticipated finding: reduced rates of photosynthesis in fluctuating light and complex re-routing of metabolic fluxes. Only in non-fluctuating light, mutants lacking the glutamate:glyoxylate aminotransferase 1 re-routed glycolate processing to the chloroplast, resulting in photooxidative damage through H
Identifiants
pubmed: 37923709
doi: 10.1038/s41467-023-42648-x
pii: 10.1038/s41467-023-42648-x
pmc: PMC10624928
doi:
Substances chimiques
Hydrogen Peroxide
BBX060AN9V
Carbon Dioxide
142M471B3J
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
7052Informations de copyright
© 2023. The Author(s).
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