A model approach revealed the relationship between banana pulpacidity and composition during growth and post harvest ripening

Etienne Audrey, Génard Michel, Bancel Doriane, Benoit Sophie, Bugaud Christophe. 2013. A model approach revealed the relationship between banana pulpacidity and composition during growth and post harvest ripening. Scientia Horticulturae, 162 : 125-134.

Quartile : Q2, Sujet : HORTICULTURE

Résumé : Titratable acidity and pH are important chemical traits for the organoleptic quality of banana since theyare related to the perception of sourness and sweetness. Banana fruit has the particularity of havingseparate growth and ripening stages, during which pulp acidity changes. A modeling approach was used tounderstand the mechanisms involved in changes in acidity during pulp growth and post harvest ripening.Changes in pH and titratable acidity were modeled by solving a set of equations representing acid/basereactions. The models were built using data from growth and post harvest ripening of three dessertbanana cultivars with contrasting acidity. For each model, calculated values were compared to observedvalues. These models allowed the prediction of pH (R2= 0.34; RMSE = 0.75, biais = 0.05) and of titratableacidity (R2= 0.81, RMSE = 2.05, biais = ?1.44) during fruit growth and post harvest ripening. The sensitivityanalyses showed that among acids, malic, citric and oxalic acids are the main contributors to banana pulpacidity, and that among soluble minerals, potassium also plays an important role. Studying the factorsthat affect the accumulation of organic acids (citric, malic, and oxalic acids) and potassium in bananapulp could be a relevant area of research with the objective of modifying banana fruit acidity.

Mots-clés Agrovoc : Musa, banane, mûrissage, pulpe de fruits, variété, acidité, pH, composition globale, acide organique, teneur en éléments minéraux, potassium, modèle mathématique, technologie après récolte

Classification Agris : Q04 - Composition des produits alimentaires
F60 - Physiologie et biochimie végétale
U10 - Informatique, mathématiques et statistiques

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Etienne Audrey, CIRAD-PERSYST-UMR Qualisud (MTQ)
• Génard Michel, INRA (FRA)
• Bancel Doriane, INRA (FRA)
• Benoit Sophie
• Bugaud Christophe, CIRAD-PERSYST-UMR Qualisud (MTQ)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570795/)

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