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  Flux balance analysis of metabolism during growth by osmotic cell expansion and its application to tomato fruits

Shameer, S., Vallarino, J. G., Fernie, A. R., Ratcliffe, R. G., & Sweetlove, L. J. (2020). Flux balance analysis of metabolism during growth by osmotic cell expansion and its application to tomato fruits. The Plant Journal, 103(1), 68-82. doi:10.1111/tpj.14707.

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Shameer, Sanu1, Autor
Vallarino, J. G.2, Autor           
Fernie, A. R.2, Autor           
Ratcliffe, R. George1, Autor
Sweetlove, Lee J1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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Schlagwörter: flux modelling, fruit development, cell expansion, Solanum lycopersicum
 Zusammenfassung: Abstract Cell expansion is a significant contributor to organ growth and is driven by the accumulation of osmolytes to increase cell turgor pressure. Metabolic modelling has the potential to provide insights into the processes that underpin osmolyte synthesis and transport, but the main computational approach for predicting metabolic network fluxes, flux balance analysis (FBA), often uses biomass composition as the main output constraint and ignores potential changes in cell volume. Here we present GrOE-FBA (Growth by Osmotic Expansion - Flux Balance Analysis), a framework that accounts for both the metabolic and ionic contributions to the osmotica that drive cell expansion, as well as the synthesis of protein, cell wall and cell membrane components required for cell enlargement. Using GrOE-FBA, the metabolic fluxes in dividing and expanding cell were analyzed, and the energetic costs for metabolite biosynthesis and accumulation in the two scenarios were found to be surprisingly similar. The expansion phase of tomato fruit growth was also modelled using a multi-phase single optimization GrOE-FBA model and this approach gave accurate predictions of the major metabolite levels throughout fruit development as well as revealing a role for transitory starch accumulation in ensuring optimal fruit development.

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Sprache(n): eng - English
 Datum: 2020
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1111/tpj.14707
BibTex Citekey: doi:10.1111/tpj.14707
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Titel: The Plant Journal
  Andere : Plant J.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Oxford : Blackwell Science
Seiten: - Band / Heft: 103 (1) Artikelnummer: - Start- / Endseite: 68 - 82 Identifikator: ISSN: 0960-7412
CoNE: https://pure.mpg.de/cone/journals/resource/954925579095_1