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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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 Creators:
Krahmer, Johanna1, Author
Abbas, Ammad1, Author
Mengin, V.2, Author              
Ishihara, H.2, Author              
Romanowski, Andrés1, Author
Furniss, James J1, Author
Moraes, T. A.2, Author              
Krohn, Nicole2, Author              
Annunziata, Maria Grazia2, Author              
Feil, R.2, Author              
Alseekh, S.3, Author              
Obata, T.4, Author              
Fernie, A. R.4, Author              
Stitt, M.2, Author              
Halliday, Karen J1, Author
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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 Abstract: 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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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1093/jxb/erab038
 Degree: -

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Title: Journal of Experimental Botany
  Other : J. Exp. Bot
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press [etc.]
Pages: - Volume / Issue: 72 (8) Sequence Number: - Start / End Page: 3263 - 3278 Identifier: ISSN: 0022-0957
CoNE: https://pure.mpg.de/cone/journals/resource/954925413883