Agritrop
Home

A biochemical model of photosynthesis for mango leaves : evidence for the effect of fruit on photosynthetic capacity of nearby leaves

Urban Laurent, Le Roux Xavier, Sinoquet Hervé, Jaffuel Sylvie, Jannoyer Magalie. 2003. A biochemical model of photosynthesis for mango leaves : evidence for the effect of fruit on photosynthetic capacity of nearby leaves. Tree Physiology, 23 (5) : pp. 289-300.

Journal article ; Article de revue à facteur d'impact
Full text not available from this repository.

Abstract : Summary Variations in leaf nitrogen concentration per unit mass (Nm) and per unit area (Na), mass-to-area ratio (Ma), total nonstructural carbohydrates (Ta), and photosynthetic capacity (maximum carboxylation rate, electron transport capacity, rate of phosphate release in triose phosphate utilization and dark respiration rate) were studied within the digitized crowns of two 3-year-old mango trees (#Mangifera indica# L.) on La Réunion Island. Additional measurements of Nm, Na, Ma, Ta, and photosynthetic capacities were performed on young, fully expanded leaves of 11-year-old mango trees. Leaves of similar gap fractions were taken far from and close to developing fruits. Unlike Nm, both Na, and Ta were linearly correlated to gap fraction. Similar relationships were found for all leaves whatever their age and origin, except for Ta, for which we found a significant tree effect. Photosynthetic capacity was nonlinearly correlated to Na, and a unique relationship was obtained for all types of leaves. Photosynthetic acclimation to light was mainly driven by changes in Ma, but allocation of total leaf N between the different photosynthetic functions also played a substantial role in acclimation to the lowest irradiances. Leaves close to developing fruits exhibited a higher photosynthetic capacity than other leaves, but similar Ta. Our data suggest that Ta does not control photosynthetic capacity in mango leaves. We used the data to parameterize a biochemically based model of photosynthesis and an empirical stomatal conductance model, allowing accurate predictions of net photosynthesis of leaves in field-grown mango trees. (Résumé d'auteur)

Mots-clés Agrovoc : Mangifera indica, Photosynthèse, Modèle, Biochimie, Âge, Feuille, Lumière du jour, Radiation solaire, Glucide, Teneur en azote

Mots-clés géographiques Agrovoc : Réunion

Classification Agris : F61 - Plant physiology - Nutrition

Auteurs et affiliations

  • Urban Laurent, CIRAD-FLHOR-ARF (REU)
  • Le Roux Xavier, INRA (FRA)
  • Sinoquet Hervé, INRA (FRA)
  • Jaffuel Sylvie, CIRAD-AMIS-AMAP (FRA)
  • Jannoyer Magalie, CIRAD-FLHOR-ARF (REU)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/514159/)

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2020-10-26 ]