A model of leaf photosynthesis for mango cv. Lirfa.
Urban L., Jannoyer M., Roux X. le, Sinoquet H., Jaffuel S.
Author Affiliation: INRA/CIRAD-Flhor, Station de Bassin-Martin, BP 180, 97455 Saint-Pierre, France.
: 411-416
Abstract : The carbon status plays a key role in flowering and fruiting of mango trees while influxes of carbohydrates seem to influence fruit size and taste. A model of carbon gain, losses and distribution between branch parts for mango is proposed. Photosynthesis represents the starting point of the modelling approach. The first step consists of using 3D digitizing to establish the relationship between the amount of leaf nitrogen per unit leaf area (Na) and the gap fraction. The second step establishes the relationship between Na and the parameters of photosynthetic capacity derived from response curves of net photosynthesis to the intercellular CO2 concentration (A-Ci curves). The results are presented of a study in 2000-01 with 3-year-old mango cv. Lirfa trees grafted on 'Maison rouge' in a commercial farm near Saint Paul, France. The capacity of the model for simulating leaf photosynthesis is also discussed.