Effect of hyperbaric atmospheres in the post-harvest of palmer mango

Author(s)

Josiane Pereira da Silva

• Document type: Doctoral Thesis
• Press: Jaboticabal. 2017-04-18.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal
• Defense date: 2016-12-16
• Advisor: Ben Hur Mattiuz; Giuseppina Pace Pereira Lima

Abstract

The purpose of the present work was to study the effect of hyperbaric atmospheres in the postharvest conservation of ‘Palmer’ mango. The experiments were carried out in the Post-Harvest Laboratory of FCAV-UNESP, Jaboticabal Campus. Palmer' mangoes were used at the stage of physiological maturation, from orchards of the Ogata Citrus Company, in the city of Taquaritinga-SP. In the first stage the treatments consisted in placing the fruits in hyperbaric chambers and applying five pressure levels (1, 2, 4, 6 and 8 atm) at 22 ± 1 °C and 1 atm at 12 °C. The relative humidity (inside the chambers) was balanced at 98-100%. Mangoes were stored for 2, 4 and 6 days. At the end of each storage period, one batch of the fruits was evaluated immediately and another batch kept in a room with ambient condition (22 °C, 51-53% RH, 1 atm) for a further 3 days. In the second stage the treatments consisted in subjecting the mangoes to pressure conditions of 1, 2, 4, 6 and 8 atm and a temperature of 12 ± 1 ºC. The relative humidity inside the chambers was equilibrated to 98-100% and storage was performed for 6 and 12 days at different pressure levels. At the end of each hyperbaric period, one batch of the fruits was evaluated immediately and another batch kept in a room with ambient condition (22 °C, 83-87% RH, 1 atm) for another 2 and 4 days. Fresh mass loss, skin and pulp color, ascorbic acid, soluble solids content, titratable acidity, total antioxidant activity, phenols, total carotenoids, soluble sugars, polyamines, enzymatic activity and respiratory rate were analyzed. The pressure of 8 atm slowed the ripening of the fruits under ambient conditions and at 12 °C, with lower mass loss, lower SS content and higher AT, lower amount of β-carotene, lower sugar content and reduction of respiratory rate. (AU)

• FAPESP's process: 13/06566-6 - Effect of high oxygen concentration atmosphere in the postharvest of fresh fruits and vegetables
• Grantee: Josiane Pereira da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate