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24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal Institut Agro Montpellier LEPSE membre de University of Montpellier Labex AGRO Institut Carnot DigitAg

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Leveau Stéphane

Leveau Stéphane
Modelling and analysis of interactions between genetic variability, water stress and nitrogen demand on growth and tillering in wheat.

Researcher Doctoral student in CIFRE with ITK SAS and l'UMR LEPSE

Thesis defended on 17.11.2022

Title : “Sensitivities of shoot expansion to abiotic stresses in wheat. Relationships between processes, at different levels, in an expanded genetic diversity”

Abstract :

Elementary summary on research chapters : The first study provides ecophysiological formalisms of leaf growth and transpiration in response to temperature and evaporative demand. In a second part, we propose a method for selecting a sub-panel of genotype to maximize yield diversity according to the grains number in durum wheat and the spikes number in bread wheat. This study also structured the genotypes according to their rank of sensitivity to the constraints of low irrigation input and nitrogen supply. The third study explores this sub-panel under water stress scenarios to provide formalisms of responses to soil water potential and genotypic trait output. These variables allow us to identify tillering as an important factor of shoot expansion in response to soil water potential. In our last study, we show that the genotypic parameters estimated in platform can be used in crop models for field projects.

Keywords: wheat, leaf growth, tillering, ecophysiology, nitrogen fertilisation, water-nitrogen interaction, crop model

Jury :


UMR LEPSE - INRAE :  Pierre Martre (thesis director) and Boris Parent (co-director)

ITK SAS : Serge Zaka (doctor in agronomy)



Phone: +33 (04) 99 61 31 80