Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” Model
Stomatal conductance (gs) and water use efficiency (WUE) of tomato leaves exposed to different irrigation regimes and at ambient CO2 (a[CO2], 400 ppm) and elevated CO2 (e[CO2], 800 ppm) environments were simulated using the “Ball-Berry” model (BB-model). Data obtained from a preliminary experiment (...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-04-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | http://journal.frontiersin.org/article/10.3389/fpls.2018.00445/full |
| _version_ | 1828812062627725312 |
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| author | Zhenhua Wei Zhenhua Wei Taisheng Du Xiangnan Li Xiangnan Li Liang Fang Fulai Liu |
| author_facet | Zhenhua Wei Zhenhua Wei Taisheng Du Xiangnan Li Xiangnan Li Liang Fang Fulai Liu |
| author_sort | Zhenhua Wei |
| collection | DOAJ |
| description | Stomatal conductance (gs) and water use efficiency (WUE) of tomato leaves exposed to different irrigation regimes and at ambient CO2 (a[CO2], 400 ppm) and elevated CO2 (e[CO2], 800 ppm) environments were simulated using the “Ball-Berry” model (BB-model). Data obtained from a preliminary experiment (Exp. I) was used for model parameterization, where measurements of leaf gas exchange of potted tomatoes were done during progressive soil drying for 5 days. The measured photosynthetic rate (Pn) was used as an input for the model. Considering the effect of soil water deficits on gs, an equation modifying the slope (m) based on the mean soil water potential (Ψs) in the whole root zone was introduced. Compared to the original BB-model, the modified model showed greater predictability for both gs and WUE of tomato leaves at each [CO2] growth environment. The models were further validated with data obtained from an independent experiment (Exp. II) where plants were subjected to three irrigation regimes: full irrigation (FI), deficit irrigation (DI), and alternative partial root-zone irrigation (PRI) for 40 days at both a[CO2] and e[CO2] environment. The simulation results indicated that gs was independently acclimated to e[CO2] from Pn. The modified BB-model performed better in estimating gs and WUE, especially for PRI strategy at both [CO2] environments. A greater WUE could be seen in plants grown under e[CO2] associated with PRI regime. Conclusively, the modified BB-model was capable of predicting gs and WUE of tomato leaves in various irrigation regimes at both a[CO2] and e[CO2] environments. This study could provide valuable information for better predicting plant WUE adapted to the future water-limited and CO2 enriched environment. |
| first_indexed | 2024-12-12T09:37:45Z |
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| id | doaj.art-4ebba609286e48b29139a5dba0a7f560 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-12T09:37:45Z |
| publishDate | 2018-04-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Plant Science |
| spelling | doaj.art-4ebba609286e48b29139a5dba0a7f5602022-12-22T00:28:40ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2018-04-01910.3389/fpls.2018.00445341345Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” ModelZhenhua Wei0Zhenhua Wei1Taisheng Du2Xiangnan Li3Xiangnan Li4Liang Fang5Fulai Liu6Center for Agricultural Water Research in China, China Agricultural University, Beijing, ChinaDepartment of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, DenmarkCenter for Agricultural Water Research in China, China Agricultural University, Beijing, ChinaDepartment of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, DenmarkNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, ChinaDepartment of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, DenmarkDepartment of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, DenmarkStomatal conductance (gs) and water use efficiency (WUE) of tomato leaves exposed to different irrigation regimes and at ambient CO2 (a[CO2], 400 ppm) and elevated CO2 (e[CO2], 800 ppm) environments were simulated using the “Ball-Berry” model (BB-model). Data obtained from a preliminary experiment (Exp. I) was used for model parameterization, where measurements of leaf gas exchange of potted tomatoes were done during progressive soil drying for 5 days. The measured photosynthetic rate (Pn) was used as an input for the model. Considering the effect of soil water deficits on gs, an equation modifying the slope (m) based on the mean soil water potential (Ψs) in the whole root zone was introduced. Compared to the original BB-model, the modified model showed greater predictability for both gs and WUE of tomato leaves at each [CO2] growth environment. The models were further validated with data obtained from an independent experiment (Exp. II) where plants were subjected to three irrigation regimes: full irrigation (FI), deficit irrigation (DI), and alternative partial root-zone irrigation (PRI) for 40 days at both a[CO2] and e[CO2] environment. The simulation results indicated that gs was independently acclimated to e[CO2] from Pn. The modified BB-model performed better in estimating gs and WUE, especially for PRI strategy at both [CO2] environments. A greater WUE could be seen in plants grown under e[CO2] associated with PRI regime. Conclusively, the modified BB-model was capable of predicting gs and WUE of tomato leaves in various irrigation regimes at both a[CO2] and e[CO2] environments. This study could provide valuable information for better predicting plant WUE adapted to the future water-limited and CO2 enriched environment.http://journal.frontiersin.org/article/10.3389/fpls.2018.00445/fullCO2alternative partial root-zone irrigationmodel simulationstomatal conductancewater use efficiencytomato |
| spellingShingle | Zhenhua Wei Zhenhua Wei Taisheng Du Xiangnan Li Xiangnan Li Liang Fang Fulai Liu Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” Model Frontiers in Plant Science CO2 alternative partial root-zone irrigation model simulation stomatal conductance water use efficiency tomato |
| title | Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” Model |
| title_full | Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” Model |
| title_fullStr | Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” Model |
| title_full_unstemmed | Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” Model |
| title_short | Simulation of Stomatal Conductance and Water Use Efficiency of Tomato Leaves Exposed to Different Irrigation Regimes and Air CO2 Concentrations by a Modified “Ball-Berry” Model |
| title_sort | simulation of stomatal conductance and water use efficiency of tomato leaves exposed to different irrigation regimes and air co2 concentrations by a modified ball berry model |
| topic | CO2 alternative partial root-zone irrigation model simulation stomatal conductance water use efficiency tomato |
| url | http://journal.frontiersin.org/article/10.3389/fpls.2018.00445/full |
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