2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications最新文献_第2页

Automated valuation of leaves area for large-scale analysis needing data coupling or petioles deletion 用于需要数据耦合或叶柄删除的大规模分析的叶面积自动估值

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524812

P. Borianne, G. Brunel

{"title":"Automated valuation of leaves area for large-scale analysis needing data coupling or petioles deletion","authors":"P. Borianne, G. Brunel","doi":"10.1109/PMA.2012.6524812","DOIUrl":"https://doi.org/10.1109/PMA.2012.6524812","url":null,"abstract":"In this paper, we present a new fully-automated approach to analyze the geometry of homogeneous leaves from numerical images produced by a desktop scanner. Our method is focused on two particular aspects: data coupling, specifically weights and areas matching, and numerical deletion of petioles, both in a large-scale analysis context. The process limits user interaction, the leaves segmentation is self conditioned and realized by a k-means classification giving the threshold value for each image. The results are arranged according to the leaves disposition on the scanner pane: the leaves labels are defined by recognitions of rows, obtained by clustering. The result layout eases the data coupling, i.e. the matching of individual leaves measures produced by different devices. We do also propose a new automated petiole removal procedure. The deletion method, applied to each single leaf, uses a morphological analysis from the leaf medial line. The process is adaptive, without expert calibration. The method is implemented in a ready to use application. Tests hold on several data sets show satisfactory results on a wide range of leaf shapes.","PeriodicalId":117786,"journal":{"name":"2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131976448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

A coupled architecture and physiology 3D growth model for young longan tree 龙眼幼树结构与生理耦合三维生长模型

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524860

Liyu Tang, Chongcheng Chen, Hongyu Huang, J. Zou, Ding Lin

{"title":"A coupled architecture and physiology 3D growth model for young longan tree","authors":"Liyu Tang, Chongcheng Chen, Hongyu Huang, J. Zou, Ding Lin","doi":"10.1109/PMA.2012.6524860","DOIUrl":"https://doi.org/10.1109/PMA.2012.6524860","url":null,"abstract":"A longan (Dimocarpus longan Lour.) growth and development simulation model was created by integrating existing knowledge of different aspect of the Longan architecture and physiology. Field investigation and measurements were conducted in longan orchard in order to acquire architectural characteristics of longan tree. The three-dimensional canopy model of longan is consisted of trunk, branches and leaves. The basic unit of stem is a parameterized segment. The 3D segment was described with cone. The leaves were depicted using parametric NURBS surface. The 3D canopy was presented by connecting the elements according to the tree architecture and topology. Hourly photosynthesis per leaf under various environmental conditions was calculated, and the total photosynthesis assimilation of the young longan in growing season was estimated. Based on source-sink partitioning theory, the biomass was allocated among organs according to the organ expansion rate and age. Tree growth is driven by the available photosynthetic products after respiration losses. The development of longan was reshaped by expanding of existing organs or generating new organs corresponding to the increments of assimilation. Thus, the simulation of the dynamic growth processes of young longan under certain environmental factors was realized. A Tree growth simulation prototype system was implemented. It includes modeling of tree morphological structure, accumulating and partitioning assimilation products among different organs, and visualizing the partitioning outcome. The simulation of fruit tree growth in virtual plant environment will be useful to understand the longan growth and to develop strategies to improve fruits production.","PeriodicalId":117786,"journal":{"name":"2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121713402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Influence of an exogenous model parameter on the steady states in an auxin transport model 外源模型参数对生长素运输模型稳态的影响

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524819

Delphine Draelants, Wim Vanroose, J. Broeckhove, G. Beemster

引用次数: 1

Modeling the ecohydrological processes in the Landes de Gascogne, SW France 模拟法国西南部加斯科涅地区的生态水文过程

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524824

A. Govind, J. Bonnefond, J. Kumari, C. Moisy, D. Loustau, J. Wigneron

{"title":"Modeling the ecohydrological processes in the Landes de Gascogne, SW France","authors":"A. Govind, J. Bonnefond, J. Kumari, C. Moisy, D. Loustau, J. Wigneron","doi":"10.1109/PMA.2012.6524824","DOIUrl":"https://doi.org/10.1109/PMA.2012.6524824","url":null,"abstract":"In this study, we simulated the ecohydrological processes of a landscape that comprises of managed maritime pine stands and crops, in a spatially explicit manner. We used various spatio-temporal datasets to run the STEPS model that describes ecophysiological, biogeochemicaland hydrological processes in a tightly coupled manner. The simulated gross primary productivity (GPP) and evapotranspiration (ET) showed large spatial variability over this landscape owing to the heterogeneities in landcover, soil texture, topography and soil hydrology. Croplands exhibited higher magnitudes of GPP (200–2500 gCm−2 yr−1) and ET fluxes (150–800 mm yr−1) in comparison to other landcover types. Maize (C4) is generally cultivated in this landscape that is managed in terms of optimal availability of water and nutrients. The spatial variability was huge in the croplands due to the presence of fallow vs. cultivated lands. The maritime pine stands also showed considerable spatial variability in GPP (426 to 1320 gCm−2 yr−1) and ET (234 to 570 mm yr−1) because of their stand ages (and the LAI) and depending on the nature of their understory species compositions. It was found that the understory contributions to the stand scale annual GPP and annual ET as much as 27% and 34%, respectively. The comparison of the simulated daily values with the measurements taken at the LeBray eddy covariance site (a maritime pine stand) revealed that the model performance were reasonable for both GPP (R2= 0.92, RMSE= 0.77 gC m−2 day−1) and ET (r2=0.81, RMSE= 0.52 mm day−1). The seasonal patterns of ET fluxes were more dynamic than GPP due to the presence of distinct subcomponent processes that were uniquely governed by environmental factors.","PeriodicalId":117786,"journal":{"name":"2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122999359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Multi-scale reconstruction of crop canopy 作物冠层的多尺度重建

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524844

Shenglian Lu, Xinyu Guo, Chunjiang Zhao, Tingting Qian, Weiliang Wen, Jianjun Du

引用次数: 3

Functional-structural plant modeling to support complex trait phenotyping: Case of rice early vigour and drought tolerance using ecomeristem model 支持复杂性状表型的功能结构植物模型:利用生态系统模型研究水稻早期活力和耐旱性

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524845

D. Luquet, M. Rebolledo, J. Soulié

{"title":"Functional-structural plant modeling to support complex trait phenotyping: Case of rice early vigour and drought tolerance using ecomeristem model","authors":"D. Luquet, M. Rebolledo, J. Soulié","doi":"10.1109/PMA.2012.6524845","DOIUrl":"https://doi.org/10.1109/PMA.2012.6524845","url":null,"abstract":"Early vigour and drought tolerance are essential for rice (Oryza sativa L.) crop establishment and final yield in rainfed, vegetative drought prone environments. However, recently, a negative linkage between these complex traits was pointed out within the rice genetic diversity, making the seedling performance under drought dependent on complex, dynamic trade-offs among several elemental traits difficult to separate experimentally. This study explored the way Ecomeristem, a FSPM of rice morphogenesis and phenotypic plasticity, can support the analysis of the genetic and environmental control of traits underlying rice genetic diversity in terms of early vigour and drought tolerance. Once validated, the model was calibrated for 176 genotypes within a diversity panel studied in a drought phenotyping, greenhouse experiment. Model parameters controlling early vigour were heritable and thus relevant for genetic studies. Parameters reproduced the negative linkages pointed out experimentally among vigour and drought tolerance traits and clustered genotypes consistently according to experimental results. The need to improve model formalisms regarding C assimilation and gas exchanges is pointed out. Opportunities and limits to support the phenotyping and genetic study of complex traits and the exploration of rice ideotypes for drought prone environments are discussed.","PeriodicalId":117786,"journal":{"name":"2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125423381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Modeling temperature-modulated stem growth of cucumber plants (Cucumis sativus L.) 黄瓜茎部温度调节生长的模拟研究

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524832

K. Kahlen, J. Zinkernagel, H. Stȕtzel

{"title":"Modeling temperature-modulated stem growth of cucumber plants (Cucumis sativus L.)","authors":"K. Kahlen, J. Zinkernagel, H. Stȕtzel","doi":"10.1109/PMA.2012.6524832","DOIUrl":"https://doi.org/10.1109/PMA.2012.6524832","url":null,"abstract":"Variation in temperature has tremendous effects on plant growth and development. Below optimal conditions, a decrease in temperature can result in both, a reduced organ appearance rate and a reduced organ growth rate. For internode growth, the latter also depends on the light signal, which in turn might be altered by the temperature effect on the canopy. The aim of this work was to analyze the importance of both, temperature and light signals for a precise prediction of stem growth. Therefore, we (i) investigated the temperature effects on the main stem of greenhouse grown cucumber plants and (ii) used an extended functional-structural plant model of cucumber, L-Cucumber, to analyze the effects of temperature x light on cucumber stem growth. Data of a greenhouse experiment with 24, 20, 16 day temperature (°C) were used for model parameterization. Organ appearance on temperature sum basis rate was significantly reduced just in case of the lowest temperature condition, whereas average internode lengths decreased with temperature. The simulation scenarios highlighted the role of both characteristics on predicting final internode lengths (FILs) and showed how light and temperature both effect on FILs. However, the presented model concept needs to be properly evaluated. Future research should investigate the timing and duration of the temperature sensitive time window for internode growth.","PeriodicalId":117786,"journal":{"name":"2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122338025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparative analysis of C3 and C4 plants using constraint-based model 基于约束模型的C3和C4植物比较分析

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524867

Chuanli Wang, Longyun Guo, Zhuo Wang

{"title":"Comparative analysis of C3 and C4 plants using constraint-based model","authors":"Chuanli Wang, Longyun Guo, Zhuo Wang","doi":"10.1109/PMA.2012.6524867","DOIUrl":"https://doi.org/10.1109/PMA.2012.6524867","url":null,"abstract":"To realize the transition from C3 to C4 plants, the systematic comparison of C3 and C4 metabolism is necessary. In this study, we detected their differences using the improved constraint-based models by setting the ratio between carboxylation and oxygenation by Rubisco. We found the C3 model exhibit more dense topology structure than C4. The simulation of enzyme knockouts demonstrated that both C3 and C4 models are very robust, especially when optimizing CO2 fixation. Moreover, C4 plant has better robustness no matter the objective function is biomass or CO2 fixation. In addition, all the essential reactions in C3 model are also essential for C4, while there are some other reactions specifically essential for C4, which validated that the basic metabolism of C4 plant is similar to C3, but C4 is more complex. We also identified more correlated reaction sets in C4, and demonstrated C4 plants have better modularity with complex mechanism coordinates the reactions and pathways than that of C3 plants. Finally, the increase of both biomass and CO2 fixation with light intensity and CO2 concentration in C4 is faster than that in C3, which reflect more efficient use of light and CO2 in C4 plant. All results are consistent with the actual situation, which indicate that constraint-based modeling is a powerful method to study plant metabolism at systems level.","PeriodicalId":117786,"journal":{"name":"2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134404369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of tree branch motion 树枝运动的仿真

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524822

Thomas Guillon, Y. Dumont, T. Fourcaud

引用次数: 0

Sensitivity analysis for a forest growth model: A statistical and time-dependent point of view 森林生长模型的敏感性分析:一个统计和时间依赖的观点

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications Pub Date : 2012-10-01 DOI: 10.1109/PMA.2012.6524857

Xiaodong Song, Gang Zhao

{"title":"Sensitivity analysis for a forest growth model: A statistical and time-dependent point of view","authors":"Xiaodong Song, Gang Zhao","doi":"10.1109/PMA.2012.6524857","DOIUrl":"https://doi.org/10.1109/PMA.2012.6524857","url":null,"abstract":"Increasing number of computer models are being used to simulate and predict the state of certain systems, in which parameter calibration and model output uncertainties co-exist due to the incomplete understanding of the system under simulation and biased model structure. In this paper, we demonstrated the ability of using sensitivity analysis, which include both screening and variance-based methods, to explore model structure and behavior. A forest growth model 3-PG2 and 141 plots of Corymbia maculata and Eucalyptus cladocalyx are used. Two model outputs, leaf area index and root biomass, were evaluated. Comparability between screening and variance-based methods and the change in sensitivities over time were assessed. High consistency was found and the variance-based method exhibited excellent convergence and stable sensitivity rankings. The results show that for each model output, the methods presented here can effectively identify the relative sensitivities of each input parameter. The results present some instructive hints about the model structure and underlying model behavior evolution features as simulation period becoming longer. This study shows that the sensitivity analysis methods are effective tools in model calibration and identification.","PeriodicalId":117786,"journal":{"name":"2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115537038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1