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Two-Source δ¹⁸O Method to Validate the CO¹⁸O-Photosynthetic Discrimination Model: Implications for Mesophyll Conductance

Holloway-Phillips, Meisha-Marika; Cernusak, Lucas; Stuart-Williams, Hilary; Ubierna, Nerea; Farquhar, Graham


Theoretical models of photosynthetic isotopic discrimination of CO2 (13C and 18O) are commonly used to estimate mesophyll conductance (gm). This requires making simplifying assumptions and assigning parameter values so that gm can be solved for as the residual term. Uncertainties in gm estimation occur due to measurement noise and assumptions not holding, including parameter uncertainty and model parametrization. Uncertainties in the 13C model have been explored previously, but there...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Plant Physiology
DOI: 10.1104/pp.19.00633


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