A process-based model of C and N metabolism in the wheat culm

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Linking traits and metabolic processes to whole plant performance results in improved crops. Barillot et al., present CN-Wheat, a comprehensive and mechanistic model of carbon (C) and nitrogen (N) metabolism within wheat culms after anthesis.

Botanical description of the culm structure of wheat as implemented in the model.
Botanical description of the culm structure of wheat as implemented in the model. Culm structure is defined as a single root compartment and photosynthetic organs are organized in phytomers, chaff and grains. Phytomers are numbered acropetally according to their rank (n being the uppermost phytomer) and are composed of a lamina (Lam), a sheath (She) and an internode (Int) or a peduncle (Ped). Parts of the internode n and peduncle are either exposed (exp) or enclosed (enc), i.e. surrounded by the previous sheath.

Culm organs are described explicitly and include structural, storage and mobile metabolites. An innovative aspect of CN-Wheat lies in the regulation of physiological processes by metabolite concentration and the environment perceived by the organs, together with the calculation of the balance of primary metabolites. Thus, metabolite concentrations act as the internal variables that allow for integration of multiple processes.

Reference

Romain Barillot, Camille Chambon, Bruno Andrieu, 2016, 'CN-Wheat, a functional–structural model of carbon and nitrogen metabolism in wheat culms after anthesis. I. Model description', Annals of Botany, vol. 118, no. 5, pp. 997-1013 http://dx.doi.org/10.1093/aob/mcw143


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