Volume 9, Numéro 2, Pages 1528-1542

Characterization Of Postharvest Physiology Of Thermised Dates (phoenix Dactylifera L.), Packed Under A Modified Atmosphere (map).

Authors : Marouf Aribi Mohamed . Khali Mustapha .


Description of the subject: The quality of the fruit is largely determined by growing conditions, a link must be made between this initial quality, linked to the agronomic conditions, and the preservation of this quality, linked to the harvest and the techniques of conservation or maturation applied thereafter. This study therefore focuses on the physiological characterization of the date stored under MAP after harvest and in the course of conservation. Objective: The effect of PET packaging on the postharvest physiology of Deglet-Nour Dates (Phoenix dactylifera L.) during storage was studied under different storage conditions (22°C ±1°C and 75-80% RH, 10°C ±2°C and 85-90% RH). Methods: The experimental setup consists of a box with internal dimensions of 7.5×15.00×7.5 cm. It is made of PET film thickness 0.0025 mm. The modified atmosphere inside the box is generated by the exchange between the product and the outside through the film. The dates are packaged in batches of 350g ±5g. The date samples were divided into two groups of batches with six samples each, corresponding to the storage period (0, 1, 2, 3, 4 and 5 months) before to be tested for the first at room temperature (22°C ±1°C) with a relative humidity of 75% to 80% and the second at low temperature of 10°C ±2°C with a relative humidity of 85 % to 90%. Results: We found that PET packaging to limit respiratory intensity during storage. The O2 and CO2 concentration of the samples stored under PET (at 22°C ±1°C) after harvesting at the Tamar stage experienced a sharp decrease in oxygen (from 20.25% to 12.86%). Likewise, the PET film packaging limited the degassed CO2 concentration after seven hours of storage compared to the control sample. After harvest, dates showed a typical respiration of non-climacteric fruit (less than 5 mmoles O2 kg-1.h-1) and low ethylene production thus with very low metabolic activities. Conclusion: The combination of thermization-packaging and cold storage (10°C ±2°C) is a storage method that ensures an optimal physiological criterion for dates by limiting their respiratory activity. Deglet-Nour dates so packaged in PET packaging, pre feel excellent storage ability beyond the five months tested.


Activité respiratoire, Cold storage, Conservation au froid, Film PET, PET packaging, Post-harvest, Poste récolte, Respiratory activity, Thermisation, Thermization

Ecology And Management Of The Date Moth, Ectomyeloisceratoniae (zeller) (lepidoptera: Pyralidae), A Pest Of Dates, Phoenix Dactylifera L., In The Southern Palm Grove Of Algeria

Boulanouar Ali .  Khelil Mohamed Anouar .  Moussaoui Abdellah .  Benlarbi Larbi .  Makhloufi Ahmed . 
pages 11-16.

Assessment Of Antioxidant And Antibacterial Activity Of Phoenix Dactylifera L. Seed Extracts: Perspective For The Development Of New Foods

Ait Ouahioune Lidia .  Bara Fatma .  Bariz Karim .  Houali Karim .  Djenane Djamel . 
pages 298-308.

Contrôle De La Contamination Des Vitroplants De Palmier Dattier (phoenix Dactylifera L.)

Mesnoua Mohammed .  Zeguerrou Reguia .  Tahar Chaouch Souad .  Chaaraoui Hafsa .  Lahmadi Salwa .  Tahirine Mohamed .  Roumani Messaoud . 
pages 82-87.