1
|
Pu L, Li Y, Gao P, Zhang H, Hu J. A photosynthetic rate prediction model using improved RBF neural network. Sci Rep 2022; 12:9563. [PMID: 35688825 PMCID: PMC9187728 DOI: 10.1038/s41598-022-12932-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/18/2022] [Indexed: 11/09/2022] Open
Abstract
A photosynthetic prediction rate model is a theoretical basis for light environmental regulation, and the existing photosynthetic rate prediction models are limited by low modeling speed and prediction accuracy. Therefore, this paper analyses effects of light quality on photosynthesis rate, and proposes a method based on Radial basis function (RBF) optimized by Quantum genetic algorithm (QGA) to establish photosynthetic rate prediction model. We selected "golden embryo2 formula 98-1F1" cucumber seedlings as experimental material and used LI-6800 to record the photosynthetic rates under different temperatures, light intensities and light quality. Experimental data is used to train and test the proposed model. The determinant coefficient of the model between the predicted and the measured values is 0.996, the straight slope of linear fitting is 1.000, and the straight intercept of linear fitting is 0.061. Moreover, the proposed method is compared with 6 artificial intelligence algorithms. The comparison results also validate that the proposed model has the highest accuracy compared with other algorithms.
Collapse
Affiliation(s)
- Liuru Pu
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yuanfang Li
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.,Key Laboratory of Agricultural Internet of Things, Ministry of Agriculture, Yangling, 712100, Shaanxi, China
| | - Pan Gao
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.,Key Laboratory of Agricultural Internet of Things, Ministry of Agriculture, Yangling, 712100, Shaanxi, China
| | - Haihui Zhang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.,Key Laboratory of Agricultural Internet of Things, Ministry of Agriculture, Yangling, 712100, Shaanxi, China
| | - Jin Hu
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China. .,Key Laboratory of Agricultural Internet of Things, Ministry of Agriculture, Yangling, 712100, Shaanxi, China.
| |
Collapse
|
2
|
Wentz KF, Neff JC, Suding KN. Leaf temperatures mediate alpine plant communities' response to a simulated extended summer. Ecol Evol 2019; 9:1227-1243. [PMID: 30805155 PMCID: PMC6374730 DOI: 10.1002/ece3.4816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 09/26/2018] [Accepted: 11/20/2018] [Indexed: 11/10/2022] Open
Abstract
We use a quantitative model of photosynthesis to explore leaf-level limitations to plant growth in an alpine tundra ecosystem that is expected to have longer, warmer, and drier growing seasons. The model is parameterized with abiotic and leaf trait data that is characteristic of two dominant plant communities in the alpine tundra and specifically at the Niwot Ridge Long Term Ecological Research Site: the dry and wet meadows. Model results produce realistic estimates of photosynthesis, nitrogen-use efficiency, water-use efficiency, and other gas exchange processes in the alpine tundra. Model simulations suggest that dry and wet meadow plant species do not significantly respond to changes in the volumetric soil moisture content but are sensitive to variation in foliar nitrogen content. In addition, model simulations indicate that dry and wet meadow species have different maximum rates of assimilation (normalized for leaf nitrogen content) because of differences in leaf temperature. These differences arise from the interaction of plant height and the abiotic environment characteristic of each plant community. The leaf temperature of dry meadow species is higher than wet meadow species and close to the optimal temperature for photosynthesis under current conditions. As a result, 2°C higher air temperatures in the future will likely lead to declines in dry meadow species' carbon assimilation. On the other hand, a longer and warmer growing season could increase nitrogen availability and assimilation rates in both plant communities. Nonetheless, a temperature increase of 4°C may lower rates of assimilation in both dry and wet meadow plant communities because of higher, and suboptimal, leaf temperatures.
Collapse
Affiliation(s)
| | - Jason C. Neff
- Environmental Studies DepartmentUniversity of ColoradoBoulderColorado
| | - Katharine N. Suding
- Institute of Arctic & Alpine Research, Ecology & Evolutionary Biology DepartmentUniversity of ColoradoBoulderColorado
| |
Collapse
|
3
|
Pardo N, Sánchez ML, Su Z, Pérez IA, García MA. SCOPE model applied for rapeseed in Spain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 627:417-426. [PMID: 29426164 DOI: 10.1016/j.scitotenv.2018.01.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 01/22/2018] [Accepted: 01/24/2018] [Indexed: 06/08/2023]
Abstract
The integrated SCOPE (Soil, Canopy Observation, Photochemistry and Energy balance) model, coupling radiative transfer theory and biochemistry, was applied to a biodiesel crop grown in a Spanish agricultural area. Energy fluxes and CO2 exchange were simulated with this model for the period spanning January 2008 to October 2008. Results were compared to experimental measurements performed using eddy covariance and meteorological instrumentation. The reliability of the model was proven by simulating latent (LE) and sensible (H) heat fluxes, soil heat flux (G), and CO2 exchanges (NEE and GPP). LAI data used as input in the model were retrieved from the MODIS and MERIS sensors. SCOPE was able to reproduce similar seasonal trends to those measured for NEE, GPP and LE. When considering H, the modelled values were underestimated for the period covering July 2008 to mid-September 2008. The modelled fluxes reproduced the observed seasonal evolution with determination coefficients of over 0.77 when LE and H were evaluated. The modelled results offered good agreement with observed data for NEE and GPP, regardless of whether LAI data belonged to MODIS or MERIS, showing slopes of 0.87 and 0.91 for NEE-MODIS and NEE-MERIS, and 0.91 and 0.94 for GPP-MODIS and GPP-MERIS, respectively. Moreover, SCOPE was able to reproduce similar seasonal behaviours to those observed for the experimental carbon fluxes, clearly showing the CO2 sink/source behaviour for the whole period studied.
Collapse
Affiliation(s)
- Nuria Pardo
- Department of Applied Physics, University of Valladolid, Valladolid, Spain.
| | - M Luisa Sánchez
- Department of Applied Physics, University of Valladolid, Valladolid, Spain
| | - Zhongbo Su
- Department of Water Resources, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Enschede, The Netherlands
| | - Isidro A Pérez
- Department of Applied Physics, University of Valladolid, Valladolid, Spain
| | - M Angeles García
- Department of Applied Physics, University of Valladolid, Valladolid, Spain
| |
Collapse
|
4
|
Soderquist BS, Kavanagh KL, Link TE, Seyfried MS, Winstral AH. Simulating the dependence of aspen (
Populus tremuloides
) on redistributed snow in a semi‐arid watershed. Ecosphere 2018. [DOI: 10.1002/ecs2.2068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- B. S. Soderquist
- Department of Forest, Rangeland, and Fire Sciences University of Idaho Moscow Idaho 83844 USA
| | - K. L. Kavanagh
- Department of Ecosystem Science and Management Texas A&M University College Station Texas 77843 USA
| | - T. E. Link
- Department of Forest, Rangeland, and Fire Sciences University of Idaho Moscow Idaho 83844 USA
| | - M. S. Seyfried
- USDA Agricultural Research Service 800 Park Boulevard, Plaza IV, Suite 105 Boise Idaho 83712 USA
| | - A. H. Winstral
- Swiss Federal Research Institute for Snow and Avalanche Research WSL Flüelastrasse 11 Davos Dorf 7260 Switzerland
| |
Collapse
|
5
|
Vanuytrecht E, Thorburn PJ. Responses to atmospheric CO 2 concentrations in crop simulation models: a review of current simple and semicomplex representations and options for model development. GLOBAL CHANGE BIOLOGY 2017; 23:1806-1820. [PMID: 28134461 DOI: 10.1111/gcb.13600] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 11/21/2016] [Accepted: 12/06/2016] [Indexed: 05/22/2023]
Abstract
Elevated atmospheric CO2 concentrations ([CO2 ]) cause direct changes in crop physiological processes (e.g. photosynthesis and stomatal conductance). To represent these CO2 responses, commonly used crop simulation models have been amended, using simple and semicomplex representations of the processes involved. Yet, there is no standard approach to and often poor documentation of these developments. This study used a bottom-up approach (starting with the APSIM framework as case study) to evaluate modelled responses in a consortium of commonly used crop models and illuminate whether variation in responses reflects true uncertainty in our understanding compared to arbitrary choices of model developers. Diversity in simulated CO2 responses and limited validation were common among models, both within the APSIM framework and more generally. Whereas production responses show some consistency up to moderately high [CO2 ] (around 700 ppm), transpiration and stomatal responses vary more widely in nature and magnitude (e.g. a decrease in stomatal conductance varying between 35% and 90% among models was found for [CO2 ] doubling to 700 ppm). Most notably, nitrogen responses were found to be included in few crop models despite being commonly observed and critical for the simulation of photosynthetic acclimation, crop nutritional quality and carbon allocation. We suggest harmonization and consideration of more mechanistic concepts in particular subroutines, for example, for the simulation of N dynamics, as a way to improve our predictive understanding of CO2 responses and capture secondary processes. Intercomparison studies could assist in this aim, provided that they go beyond simple output comparison and explicitly identify the representations and assumptions that are causal for intermodel differences. Additionally, validation and proper documentation of the representation of CO2 responses within models should be prioritized.
Collapse
Affiliation(s)
- Eline Vanuytrecht
- Division of Soil and Water management, Department of Earth & Environmental Sciences, KU Leuven, Celestijnenlaan 200E, po 2411, B-3001, Heverlee, Belgium
| | - Peter J Thorburn
- CSIRO Agriculture and Food, 306 Carmody Road, St Lucia, Qld, 4068, Australia
| |
Collapse
|
6
|
Sun J, Sun J, Feng Z. Modelling photosynthesis in flag leaves of winter wheat (Triticum aestivum) considering the variation in photosynthesis parameters during development. FUNCTIONAL PLANT BIOLOGY : FPB 2015; 42:1036-1044. [PMID: 32480743 DOI: 10.1071/fp15140] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 08/10/2015] [Indexed: 06/11/2023]
Abstract
The Farquhar-von Caemmerer-Berry (FvCB) model of photosynthesis has been widely used to estimate the photosynthetic C flux of plants under different growth conditions. However, the seasonal fluctuation of some photosynthesis parameters (e.g. the maximum carboxylation rate of Rubisco (Vcmax), the maximum electron transport rate (Jmax) and internal mesophyll conductance to CO2 transport (gm)) is not considered in the FvCB model. In this study, we investigated the patterns of the FvCB parameters during flag leaf development based on measured photosynthesis-intercellular CO2 curves in two cultivars of winter wheat (Triticum aestivum L.). Parameterised seasonal patterns of photosynthesis parameters in the FvCB model have subsequently been applied in order to predict the photosynthesis of flag leaves. The results indicate that the Gaussian curve characterises the dynamic patterns of Vcmax, Jmax and gm well. Compared with the model with fixed photosynthesis parameter values, updating the FvCB model by considering seasonal changes in Vcmax and Jmax during flag leaf development slightly improved predictions of photosynthesis. However, if the updated FvCB model incorporated the seasonal patterns of Vcmax and Jmax, and also of gm, predictions of photosynthesis was improved a lot, matching well with the measurements (R2=0.87, P<0.0001). This suggests that the dynamics of photosynthesis parameters, particularly gm, play an important role in estimating the photosynthesis rate of winter wheat.
Collapse
Affiliation(s)
- Jingsong Sun
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | | | - Zhaozhong Feng
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| |
Collapse
|
7
|
Niinemets U. Improving modeling of the 'dark part' of canopy carbon gain. TREE PHYSIOLOGY 2014; 34:557-563. [PMID: 24812041 DOI: 10.1093/treephys/tpu030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- Ulo Niinemets
- Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia
| |
Collapse
|
8
|
Simulating canopy photosynthesis for two competing species of an anthropogenic grassland community in the Andes of southern Ecuador. Ecol Modell 2012. [DOI: 10.1016/j.ecolmodel.2012.01.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
9
|
Tosens T, Niinemets U, Vislap V, Eichelmann H, Castro Díez P. Developmental changes in mesophyll diffusion conductance and photosynthetic capacity under different light and water availabilities in Populus tremula: how structure constrains function. PLANT, CELL & ENVIRONMENT 2012; 35:839-56. [PMID: 22070625 DOI: 10.1111/j.1365-3040.2011.02457.x] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Finite mesophyll diffusion conductance (g(m) ) significantly constrains net assimilation rate (A(n) ), but g(m) variations and variation sources in response to environmental stresses during leaf development are imperfectly known. The combined effects of light and water limitations on g(m) and diffusion limitations of photosynthesis were studied in saplings of Populus tremula L. An one-dimensional diffusion model was used to gain insight into the importance of key anatomical traits in determining g(m) . Leaf development was associated with increases in dry mass per unit area, thickness, density, exposed mesophyll (S(mes) /S) and chloroplast (S(c) /S) to leaf area ratio, internal air space (f(ias) ), cell wall thickness and chloroplast dimensions. Development of S(mes) /S and S(c) /S was delayed under low light. Reduction in light availability was associated with lower S(c) /S, but with larger f(ias) and chloroplast thickness. Water stress reduced S(c) /S and increased cell wall thickness under high light. In all treatments, g(m) and A(n) increased and CO(2) drawdown because of g(m) , C(i) -C(c) , decreased with increasing leaf age. Low light and drought resulted in reduced g(m) and A(n) and increased C(i) -C(c) . These results emphasize the importance of g(m) and its components in determining A(n) variations during leaf development and in response to stress.
Collapse
Affiliation(s)
- Tiina Tosens
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014, Estonia, Spain.
| | | | | | | | | |
Collapse
|
10
|
Percy KE, Matyssek R, King JS. Facing the Future: evidence from Joint Aspen FACE, SoyFACE and SFB 607 meeting. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2010; 158:955-958. [PMID: 20022151 DOI: 10.1016/j.envpol.2009.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
|