Carbon allocation between growth and production in fruit trees

Génard Michel, Dauzat Jean, Franck Nicolas, Lescourret Françoise, Moitrier Nicolas, Vaast Philippe, Vercambre Gilles. 2007. Carbon allocation between growth and production in fruit trees. In : 21st International Conference on Coffee Science, Montpellier (France), 11th - 15th September 2006 = 21ème Colloque scientifique international sur le café ; 21. Internationales Wissenshaftliches Kolloquium über Kaffee ; 21e Coloquio Cientifico Internacional sobre el Café. ASIC. Montpellier : ASIC, 1003-1022. ISBN 2-900212-20-0 Colloque Scientifique International sur le Café. 21, Montpellier, France, 11 Septembre 2006/15 Septembre 2006.

Résumé : Carbon allocation within a plant depends on complex rules linking source organs (mainly shoots) and sink organs (mainly roots and fruits). The complexity of these rules comes from both regulations and interactions between various plant processes involving carbon. This paper presents these regulations and interactions, and analyses how agricultural management can influence them. Ecophysiological models of carbon production and allocation are good tools for such analyses. The fundamental bases of these models are first presented, focusing on their underlying processes and concepts. Different approaches are used for modelling carbon economy. They are classified as empirical, teleonomic, source-sink or based on transport and chemical/biochemical conversion concepts. These four approaches are presented with a particular emphasis on the regulations and interactions between organs and between processes. The role of plant architecture in carbon partitioning is also discussed and the interest of coupling plant architecture models with carbon allocation models is highlighted. The link between roots, shoots and reproductive compartments is analysed through a model developed for peach trees, describing carbon transfer within the plant, and based on source-sink and Munch transport theory. On this basis, the consequences of fruit load or plant pruning on fruit and vegetative growth can be evaluated.

Mots-clés Agrovoc : arbre fruitier, glucide, carbone, régulation physiologique, développement biologique, croissance, relation source puits

Mots-clés complémentaires : Sink effect, Architecture des arbres

Classification Agris : F62 - Physiologie végétale - Croissance et développement
F61 - Physiologie végétale - Nutrition

Auteurs et affiliations

• Génard Michel, INRA (FRA)
• Dauzat Jean, CIRAD-AMIS-UMR AMAP (FRA)
• Franck Nicolas, Universidad de Chile (CHL)
• Lescourret Françoise, INRA (FRA)
• Moitrier Nicolas, INRA (FRA)
• Vaast Philippe, CIRAD-FORET-UPR Ecosystèmes de plantations (CRI)
• Vercambre Gilles, INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/540101/)

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