Effect of initial low oxygen stress combined with 1-methylcyclopropene in ‘Royal Gala’ apple quality stored under ultralow O2

Auri Brackmann, Rogério Oliveira Anese, Anderson Weber, Vanderlei Both, Adriano Roque de Gasperin, Elizandra Pivotto Pavanello

Abstract


The aim of this study was evaluated initial low oxygen stress (ILOS) and the interaction with 1-methylcyclopropene (1-MCP) during ultralow oxygen (ULO) storage in maintenance of ‘Royal Gala’ apple quality. The experiment was conducted in a completely randomized design, with two-factor. Each ILOS was applied for 14 days with 0.4 kPa O2. The treatments evaluated were: [1] 1.2 kPa O2 + 2.0 kPa CO2 (control); [2] 0.6 kPa O2 + 1.0 kPa CO2 (without stress); [3] 0.6 kPa O2 + 1.0 kPa CO2 (one stress); [4] 0.8 kPa O2 + 1.0 kPa CO2 (one stress); [5] 0.6 kPa O2 + 1.0 kPa CO2 (two stresses); [6] 0.6 kPa O2 + 1.0 kPa CO2 (three stresses). The fruits were kept at 0.5 ºC (±0.1) and relative humidity of 97% (±2.0). After seven months of storage plus seven days of self-life at 20 ºC, the following variables were assessed: internal breakdown, mealiness, crack, healthy fruits, flesh firmness, decay, ethylene production, ACC (1-aminocyclopropane-1-carboxylic acid) oxidase activity and respiration. ILOS and ULO do not decrease internal breakdown, mealiness and crack. ILOS associated to ULO, with or without 1-MCP, is not efficient in maintaining quality and reduce physiological disorders during ‘Royal Gala’ apple storage harvested at advanced maturity stage, besides induce more decay.


Keywords


Malus domestica Borkh.; Controlled atmosphere; Physiological disorders; Ultralow oxygen.



DOI: http://dx.doi.org/10.5433/1679-0359.2013v34n3p1185

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional