Model-assisted analysis of spatial and temporal variations in fruit temperature and transpiration highlighting the role of fruit development

Thibault Nordey; Mathieu Léchaudel; Marc Saudreau; Jacques Joas; Michel Génard

Model-assisted analysis of spatial and temporal variations in fruit temperature and transpiration highlighting the role of fruit development

Thibault Nordey ^{1, 2} Mathieu Léchaudel ^{3, 4, 2} Marc Saudreau ⁵ Jacques Joas ^{3, 4} Michel Génard ⁶

1 CIRAD-PERSYST-Direction - Direction du département Performances des systèmes de production et de transformation tropicaux

2 UPR 103 HORTSYS - Fonctionnement agroécologique et performances des systèmes de cultures horticoles

3 Qualisud Réunion - Qualisud - Pôle de La Réunion

UMR Qualisud - Démarche intégrée pour l'obtention d'aliments de qualité

4 UMR Qualisud - Démarche intégrée pour l'obtention d'aliments de qualité

5 PIAF - Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier

6 PSH - Unité de recherche Plantes et Systèmes de Culture Horticoles

Abstract : Fruit physiology is strongly affected by both fruit temperature and water losses through transpiration. Fruit temperature and its transpiration vary with environmental factors and fruit characteristics. In line with previous studies, measurements of physical and thermal fruit properties were found to significantly vary between fruit tissues and maturity stages. To study the impact of these variations on fruit temperature and transpiration, a modelling approach was used. A physical model was developed to predict the spatial and temporal variations of fruit temperature and transpiration according to the spatial and temporal variations of environmental factors and thermal and physical fruit properties. Model predictions compared well to temperature measurements on mango fruits, making it possible to accurately simulate the daily temperature variations of the sunny and shaded sides of fruits. Model simulations indicated that fruit development induced an increase in both the temperature gradient within the fruit and fruit water losses, mainly due to fruit expansion. However, the evolution of fruit characteristics has only a very slight impact on the average temperature and the transpiration per surface unit. The importance of temperature and transpiration gradients highlighted in this study made it necessary to take spatial and temporal variations of environmental factors and fruit characteristics into account to model fruit physiology. (Résumé d'auteur)

Keywords : vapor-pressure deficit mangifera-indica l. mango fruit respiration rate tomato fruits peach fruit apple fruit surface conductance aerobic conditions simulation-model

Document type :

Journal articles

Domain :

Life Sciences [q-bio] / Food engineering

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http://hal.univ-reunion.fr/hal-01193198
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Model-assisted analysis of spatial and temporal variations in fruit temperature and transpiration highlighting the role of fruit development

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Model-assisted analysis of spatial and temporal variations in fruit temperature and transpiration highlighting the role of fruit development

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