Skip to Main content Skip to Navigation
Theses

Modélisation de l’architecture 4D du blé : identification des patterns dans la morphologie, la sénescence et le positionnement spatial des organes dans une large gamme de situations de croissance

Abstract : The simulation of plant architecture has become a very active front of research because of its importance for understanding the functioning of plants and their interactions with the environment. When analysing observations of experimental treatments, it is of a great interest to be able to simulate the architecture of the crop with sufficient fidelity to represent the specific traits resulting from the experiment. In this context, the objective of the thesis project was to develop an operational model allowing to simulate the 4D architecture of a collection of individual plants for the whole crop cycle and in a way faithful to the observations. Our approach builds on the experimental characterization of a range of commercial cultivars cultivated in the Paris region. These data represent a wide range of climatic sequences, sowing dates, densities of seedlings and nitrogen fertilization. The data analysis allowed us to identify stable and robust functions that describe the dynamics of appearance and mortality and the final dimensions of the different components of the plant. Our work brings also novel information on the evolution of their geometry and spatial organisation over time. These functions were coded into a model that describes the dynamics of the architecture of a collection of plants from their emergence to their full maturity. Our reconstruction method allowed us to generate 4D reconstructions for a large part of our experimental treatments; it has also been used in several projects carried out in parallel with this work. Our model can also be used to explore potential architectures traits in order to propose new ideotypes. Finally, our modelling approach can be applied to other cereals: it provides a framework for comparing patterns of morphology and development between species and provides a tool to study, by simulation, the impact of the architectural traits of each species.
Document type :
Theses
Complete list of metadatas

Cited literature [68 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02316154
Contributor : Abes Star :  Contact
Submitted on : Tuesday, October 15, 2019 - 10:20:34 AM
Last modification on : Tuesday, September 29, 2020 - 6:10:23 AM
Long-term archiving on: : Thursday, January 16, 2020 - 2:10:24 PM

File

52108_ABICHOU_2016_archivage.p...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02316154, version 1

Citation

Mariem Abichou. Modélisation de l’architecture 4D du blé : identification des patterns dans la morphologie, la sénescence et le positionnement spatial des organes dans une large gamme de situations de croissance. Agronomie. Université Paris Saclay (COmUE), 2016. Français. ⟨NNT : 2016SACLA022⟩. ⟨tel-02316154⟩

Share

Metrics

Record views

108

Files downloads

170