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  Phytochromes control metabolic flux, and their action at the seedling stage determines adult plant biomass

Krahmer, J., Abbas, A., Mengin, V., Ishihara, H., Romanowski, A., Furniss, J. J., et al. (2021). Phytochromes control metabolic flux, and their action at the seedling stage determines adult plant biomass. Journal of Experimental Botany, 72(8), 3263-3278. doi:10.1093/jxb/erab038.

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Krahmer, Johanna1, Autor
Abbas, Ammad1, Autor
Mengin, V.2, Autor           
Ishihara, H.2, Autor           
Romanowski, Andrés1, Autor
Furniss, James J1, Autor
Moraes, T. A.2, Autor           
Krohn, Nicole2, Autor           
Annunziata, Maria Grazia2, Autor           
Feil, R.2, Autor           
Alseekh, S.3, Autor           
Obata, T.4, Autor           
Fernie, A. R.4, Autor           
Stitt, M.2, Autor           
Halliday, Karen J1, Autor
Affiliations:
1external, ou_persistent22              
2System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              
3The Genetics of Crop Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_3244836              
4Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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 Zusammenfassung: Phytochrome (phy) photoreceptors are known to regulate plastic growth responses to vegetation shade. However, recent reports also suggest an important role for phys in carbon resource management, metabolism, and growth. Here, we use 13CO2 labelling patterns in multi-allele phy mutants to investigate the role of phy in the control of metabolic fluxes. We also combine quantitative data of 13C incorporation into protein and cell wall polymers, gas exchange measurements and system modelling to investigate why biomass is decreased in adult multi-allele phy mutants. Phy influences the synthesis of stress metabolites like raffinose and proline, and the accumulation of sugars, possibly through regulating vacuolar sugar transport. Remarkably, despite their modified metabolism and vastly altered architecture, growth rates in adult phy mutants resemble those of wild-type plants. Our results point to delayed seedling growth and smaller cotyledon size as the cause of the adult-stage phy mutant biomass defect. Our data signify a role for phy in metabolic stress physiology, carbon partitioning and illustrate that phy action at the seedling stage sets the trajectory for adult biomass production.

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Sprache(n): eng - English
 Datum: 2021
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1093/jxb/erab038
 Art des Abschluß: -

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Titel: Journal of Experimental Botany
  Andere : J. Exp. Bot
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford : Oxford University Press [etc.]
Seiten: - Band / Heft: 72 (8) Artikelnummer: - Start- / Endseite: 3263 - 3278 Identifikator: ISSN: 0022-0957
CoNE: https://pure.mpg.de/cone/journals/resource/954925413883