title: Genotype effects on internal gas gradients in apple fruit.
abstract: A permeation-diffusion-reaction model was applied to study gas exchange of apple fruit (Kanzi, Jonagold, and Braeburn) as effected by morphology and respiratory metabolism. The gas exchange properties and respiration parameters of the fruit organ tissues were measured. The actual internal tissue geometry of the fruit was reconstructed from digital fruit images and the model was solved over this geometry using the finite element method. The model was validated based on measurements of internal gas concentrations and the gas flux of the fruit to its environment. Both measurements and an in silico study revealed that gradients of metabolic gases exist in apple fruit, depending on diffusion properties and respiration of the different cultivars. Macroscale simulation confirmed that Jonagold has large potential for controlled atmosphere (CA) storage while low diffusion properties of cortex tissue in Braeburn indicated a risk of storage disorder development. Kanzi had less O(2) anoxia at CA storage compared with Braeburn.
authors.affiliation: Flanders Centre of Postharvest Technology/BIOSYST-MeBioS, Faculty of Bioscience Engineering, Katholieke Universiteit Leuven, Willem de Croylaan 42, Leuven, Belgium.
authors.forename: Q Tri
authors.initials: QT
authors.lastname: Ho
authors.forename: Pieter
authors.initials: P
authors.lastname: Verboven
authors.forename: Bert E
authors.initials: BE
authors.lastname: Verlinden
authors.forename: Ann
authors.initials: A
authors.lastname: Schenk
authors.forename: Mulugeta A
authors.initials: MA
authors.lastname: Delele
authors.forename: Hardy
authors.initials: H
authors.lastname: Rolletschek
authors.forename: Jef
authors.initials: J
authors.lastname: Vercammen
authors.forename: Bart M
authors.initials: BM
authors.lastname: Nicolaï
mesh_terms: D001272:Atmosphere; D001692:Biological Transport; D002245:Carbon Dioxide / Q000378:metabolism; D019069:Cell Respiration; D004058:Diffusion; D005638:Fruit / Q000166:cytology / Q000235:genetics* / Q000378:metabolism*; D005740:Gases / Q000378:metabolism*; D005838:Genotype; D007700:Kinetics; D027845:Malus / Q000166:cytology / Q000235:genetics* / Q000378:metabolism*; D008954:Models, Biological; D009584:Nitrogen / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D010101:Oxygen Consumption; D010313:Partial Pressure; D010539:Permeability; D016062:Porosity; D013997:Time Factors
chemical_list: D005740:Gases; D002245:Carbon Dioxide; D009584:Nitrogen; D010100:Oxygen