Jean-Michel Allirand
Institut national de la recherche agronomique
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Featured researches published by Jean-Michel Allirand.
Annals of Botany | 2011
Alexandra Jullien; Amélie Mathieu; Jean-Michel Allirand; Amélie Pinet; Philippe De Reffye; Paul-Henry Cournède; Bertrand Ney
BACKGROUND AND AIMSnThis study aimed to characterize the interaction between architecture and source-sink relationships in winter oilseed rape (WOSR): do the costs of ramification compromise the source-sink ratio during seed filling? The GreenLab model is a good candidate to address this question because it has been already used to describe interactions between source-sink relationships and architecture for other species. However, its adaptation to WOSR is a challenge because of the complexity of its developmental scheme, especially during the reproductive phase.nnnMETHODSnEquations were added in GreenLab to compute expansion delays for ramification, flowering of each axis and photosynthesis of pods including the energetic cost of oil synthesis. Experimental field data were used to estimate morphological parameters while source-sink parameters of the model were estimated by adjustment of model outputs to the data. Ecophysiological outputs were used to assess the sources/sink relationships during the whole growth cycle.nnnKEY RESULTSnFirst results indicated that, at the plant scale, the model correctly simulates the dynamics of organ growth. However, at the organ scale, errors were observed that could be explained either by secondary growth that was not incorporated or by uncertainties in morphological parameters (durations of expansion and life). Ecophysiological outputs highlighted the dramatic negative impact of ramification on the source-sink ratio, as well as the decrease in this ratio during seed filling despite pod envelope photosynthesis that allowed significant biomass production to be maintained.nnnCONCLUSIONSnThis work is a promising first step in the construction of a structure-function model for a plant as complex as WOSR. Once tested for other environments and/or genotypes, the model can be used for studies on WOSR architectural plasticity.
2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications | 2012
Alexandra Jullien; Amélie Mathieu; Bertrand Ney; Rui Qi; Jean-Michel Allirand; Céline Richard-Molard
A functional-structural model of winter oilseed rape (WOSR) has been developed to study plant morphogenetic plasticity, i.e. how processes of morphogenesis are adapted in response to environmental constraints. The phyllochron (time between emergence of two successive leaves) is one of the variables sensitive to environment. The aim of this article is to use model sensitivity analysis to quantify the impact of an increase or a reduction in phyllochron on plant growth and source/sink functioning.
Agronomie | 1986
Ghislain Gosse; Claude Varlet-Grancher; Raymond Bonhomme; Michel Chartier; Jean-Michel Allirand; Gilles Lemaire
Annals of Botany | 1991
Gilles Lemaire; B. Onillon; Ghislain Gosse; Michel Chartier; Jean-Michel Allirand
Agronomie | 1997
Bruno Andrieu; Jean-Michel Allirand; K. Jaggard
Agronomie | 1989
Michel Chartier; P. Bonchretien; Jean-Michel Allirand; Ghislain Gosse
European Journal of Agronomy | 2011
Pascal Thiebeau; Nicolas Beaudoin; Eric Justes; Jean-Michel Allirand; Gilles Lemaire
Annals of Botany | 1991
S. Philippot; Jean-Michel Allirand; Michel Chartier; Ghislain Gosse
Archive | 2004
Safia Médiène; Jonathan Hillier; Jean-Michel Allirand; C. Richard-Mollard; Florence Lafouge; Bertrand Ney
Agronomie | 1997
Jean-Michel Allirand; Michel Chartier; Bruno Andrieu; Ghislain Gosse; Claude Varlet-Grancher; D. Coulmier