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Barillot R, Chambon C, Andrieu B. CN-Wheat, a functional-structural model of carbon and nitrogen metabolism in wheat culms after anthesis. II. Model evaluation. Ann Bot. 2016;118(5):1015-1031doi: 10.1093/aob/mcw144.
Barillot, R., Chambon, C., & Andrieu, B. (2016). CN-Wheat, a functional-structural model of carbon and nitrogen metabolism in wheat culms after anthesis. II. Model evaluation. Annals of botany, 118(5), 1015-1031. https://doi.org/10.1093/aob/mcw144
Barillot, Romain, et al. "CN-Wheat, a functional-structural model of carbon and nitrogen metabolism in wheat culms after anthesis. II. Model evaluation." Annals of botany vol. 118,5 (2016): 1015-1031. doi: https://doi.org/10.1093/aob/mcw144
Barillot R, Chambon C, Andrieu B. CN-Wheat, a functional-structural model of carbon and nitrogen metabolism in wheat culms after anthesis. II. Model evaluation. Ann Bot. 2016 Oct 01;118(5):1015-1031. doi: 10.1093/aob/mcw144. PMID: 27497243; PMCID: PMC5055823.
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Ann Bot. 2016 Oct 01;118(5):1015-1031. doi: 10.1093/aob/mcw144.

CN-Wheat, a functional-structural model of carbon and nitrogen metabolism in wheat culms after anthesis. II. Model evaluation.

Annals of botany

Romain Barillot, Camille Chambon, Bruno Andrieu

Affiliations

  1. UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France.

PMID: 27497243 PMCID: PMC5055823 DOI: 10.1093/aob/mcw144

Abstract

Background and Aims Simulating resource allocation in crops requires an integrated view of plant functioning and the formalization of interactions between carbon (C) and nitrogen (N) metabolisms. This study evaluates the functional-structural model CN-Wheat developed for winter wheat after anthesis. Methods In CN-Wheat the acquisition and allocation of resources between photosynthetic organs, roots and grains are emergent properties of sink and source activities and transfers of mobile metabolites. CN-Wheat was calibrated for field plants under three N fertilizations at anthesis. Model parameters were taken from the literature or calibrated on the experimental data. Key Results The model was able to predict the temporal variations and the distribution of resources in the culm. Thus, CN-Wheat accurately predicted the post-anthesis kinetics of dry masses and N content of photosynthetic organs and grains in response to N fertilization. In our simulations, when soil nitrates were non-limiting, N in grains was ultimately determined by availability of C for root activity. Dry matter accumulation in grains was mostly affected by photosynthetic organ lifespan, which was regulated by protein turnover and C-regulated root activity. Conclusions The present study illustrates that the hypotheses implemented in the model were able to predict realistic dynamics and spatial patterns of C and N. CN-Wheat provided insights into the interplay of C and N metabolism and how the depletion of mobile metabolites due to grain filling ultimately results in the cessation of resource capture. This enabled us to identify processes that limit grain mass and protein content and are potential targets for plant breeding.

© The Author 2016. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: [email protected].

Keywords: Triticum aestivum ; Amino acids; carbon; cytokinins; fructans; nitrogen; plant metabolism and physiology; process-based functional–structural plant model; proteins; sink–source relations; sucrose; wheat

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