Etude des processus écophysiologiques caractérisant la distribution du carbone entre les sources et les puits au sein de la charpentière du pommier. Eléments pour un modèle fonction-structure

Abstract : The synthesis and the transport of carbon in apple are basedon a whole host of complex and interlaced mechanisms thatdepend on endogenous and exogenous factors. An approachthat combines the ecophysiological characterisation with theuse of a Functional-Structural Plant Model (FSPM) representsan interesting method in this fi eld of research, inasmuch assuch an FSPM allows integrating the topology and the geometryof the plant and its constituting organs with the entiretyof factors involved in assimilation as well as water andcarbon transport. The present study has contributed to thebetter understanding of the source-sink relations characterizingthis system but also to the elaboration of a multi-scaledFSPM. First, the development of models for the prediction ofthe architecture of different shoot types in apple from simplevariables provides a novel way to simplify the simulationof theinitial structure of branches but also to quantify leaf area in arobust manner. Second, the creation of a network of correlationsamong morphometric variables of the different organsformed by the mixed bud of apple clearly shows the functionalrelations among the spur organs. In the end, the study ofsource-sink relations at the branch scale has allowed, on theone hand, to characterize the regulation of net photosynthesisas a function of a changed source/sink ratio but also asa function of leaf type and, on the other hand, to shed somelight on the infl uence that the competition among fruits hason increasing sink strength and thus regulating the leaf
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-01709029
Contributor : Abes Star <>
Submitted on : Wednesday, February 14, 2018 - 2:26:07 PM
Last modification on : Tuesday, May 7, 2019 - 6:30:16 PM
Long-term archiving on : Tuesday, May 8, 2018 - 12:40:55 AM

File

pdfa_JyUIy8US_bairam.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01709029, version 1

Citation

Emna Bairam. Etude des processus écophysiologiques caractérisant la distribution du carbone entre les sources et les puits au sein de la charpentière du pommier. Eléments pour un modèle fonction-structure. Amélioration des plantes. Agrocampus Ouest, 2017. Français. ⟨NNT : 2017NSARC129⟩. ⟨tel-01709029⟩

Share

Metrics

Record views

372

Files downloads

139