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- W2591662637 abstract "Accurately predicting photosynthesis in response to water and nitrogen stress is the first step towards predicting crop growth, yield and many quality traits under fluctuating environmental conditions. While mechanistic models are capable of predicting photosynthesis under fluctuating environmental conditions, simplifying the parameterisation procedure is important towards a wide range of model applications. In this study, the biochemical photosynthesis model of Farquhar, von Caemmerer and Berry (the FvCB model) and the stomatal conductance model of Ball, Woodrow and Berry which was revised by Leuning and Yin (the BWB-Leuning-Yin model) were parameterised for Lilium (L. auratum × speciosum ‘Sorbonne’) grown under different water and nitrogen conditions. Linear relationships were found between biochemical parameters of the FvCB model and leaf nitrogen content per unit leaf area (Na), and between mesophyll conductance and Na under different water and nitrogen conditions. By incorporating these Na-dependent linear relationships, the FvCB model was able to predict the net photosynthetic rate (An) in response to all water and nitrogen conditions. In contrast, stomatal conductance (gs) can be accurately predicted if parameters in the BWB-Leuning-Yin model were adjusted specifically to water conditions; otherwise gs was underestimated by 9% under well-watered conditions and was overestimated by 13% under water-deficit conditions. However, the 13% overestimation of gs under water-deficit conditions led to only 9% overestimation of An by the coupled FvCB and BWB-Leuning-Yin model whereas the 9% underestimation of gs under well-watered conditions affected little the prediction of An. Our results indicate that to accurately predict An and gs under different water and nitrogen conditions, only a few parameters in the BWB-Leuning-Yin model need to be adjusted according to water conditions whereas all other parameters are either conservative or can be adjusted according to their linear relationships with Na. Our study exemplifies a simplified procedure of parameterising the coupled FvCB and gs model that is widely used for various modelling purposes." @default.
- W2591662637 created "2017-03-16" @default.
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- W2591662637 date "2017-03-28" @default.
- W2591662637 modified "2023-10-18" @default.
- W2591662637 title "Can the Responses of Photosynthesis and Stomatal Conductance to Water and Nitrogen Stress Combinations Be Modeled Using a Single Set of Parameters?" @default.
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- W2591662637 doi "https://doi.org/10.3389/fpls.2017.00328" @default.
- W2591662637 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5368885" @default.
- W2591662637 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28400773" @default.
- W2591662637 hasPublicationYear "2017" @default.
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