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Open AccessArticle

Cytochrome c Deficiency Differentially Affects the In Vivo Mitochondrial Electron Partitioning and Primary Metabolism Depending on the Photoperiod

1
Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB Bellaterra, 08193 Barcelona, Spain
2
Instituto de Agrobiotecnología del Litoral (CONICET-UNL), Cátedra de Biología Celular y Molecular, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe 3000, Argentina
3
Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
4
Research Group on Plant Biology, Balearic Islands University, Ctra Valldemossa km 7.5, 07122 Palma de Mallorca, Spain
5
Laboratorio de Fisiología Vegetal, Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, 4030000 Concepción, Chile
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Gennaro Agrimi
Plants 2021, 10(3), 444; https://doi.org/10.3390/plants10030444
Received: 12 February 2021 / Accepted: 18 February 2021 / Published: 26 February 2021
(This article belongs to the Section Plant Physiology and Metabolism)
Plant respiration provides metabolic flexibility under changing environmental conditions by modulating the activity of the nonphosphorylating alternative pathways from the mitochondrial electron transport chain, which bypass the main energy-producing components of the cytochrome oxidase pathway (COP). While adjustments in leaf primary metabolism induced by changes in day length are well studied, possible differences in the in vivo contribution of the COP and the alternative oxidase pathway (AOP) between different photoperiods remain unknown. In our study, in vivo electron partitioning between AOP and COP and expression analysis of respiratory components, photosynthesis, and the levels of primary metabolites were studied in leaves of wild-type (WT) plants and cytochrome c (CYTc) mutants, with reduced levels of COP components, under short- and long-day photoperiods. Our results clearly show that differences in AOP and COP in vivo activities between WT and cytc mutants depend on the photoperiod likely due to energy and stress signaling constraints. Parallel responses observed between in vivo respiratory activities, TCA cycle intermediates, amino acids, and stress signaling metabolites indicate the coordination of different pathways of primary metabolism to support growth adaptation under different photoperiods. View Full-Text
Keywords: alternative oxidase (AOX); cytochrome c (CYTc); oxygen isotope discrimination; metabolite profiling; photoperiod; primary metabolism alternative oxidase (AOX); cytochrome c (CYTc); oxygen isotope discrimination; metabolite profiling; photoperiod; primary metabolism
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MDPI and ACS Style

Florez-Sarasa, I.; Welchen, E.; Racca, S.; Gonzalez, D.H.; Vallarino, J.G.; Fernie, A.R.; Ribas-Carbo, M.; Del-Saz, N.F. Cytochrome c Deficiency Differentially Affects the In Vivo Mitochondrial Electron Partitioning and Primary Metabolism Depending on the Photoperiod. Plants 2021, 10, 444. https://doi.org/10.3390/plants10030444

AMA Style

Florez-Sarasa I, Welchen E, Racca S, Gonzalez DH, Vallarino JG, Fernie AR, Ribas-Carbo M, Del-Saz NF. Cytochrome c Deficiency Differentially Affects the In Vivo Mitochondrial Electron Partitioning and Primary Metabolism Depending on the Photoperiod. Plants. 2021; 10(3):444. https://doi.org/10.3390/plants10030444

Chicago/Turabian Style

Florez-Sarasa, Igor; Welchen, Elina; Racca, Sofia; Gonzalez, Daniel H.; Vallarino, José G.; Fernie, Alisdair R.; Ribas-Carbo, Miquel; Del-Saz, Nestor F. 2021. "Cytochrome c Deficiency Differentially Affects the In Vivo Mitochondrial Electron Partitioning and Primary Metabolism Depending on the Photoperiod" Plants 10, no. 3: 444. https://doi.org/10.3390/plants10030444

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