Modified atmosphere packaging extending the storage life of 'douradão' peach

Abstract

-'Douradão' peach is a perishable product and when cold stored is subject to chilling injury. The objective of the experiment was to evaluate the effect of modified atmosphere packaging (MAP) and cold storage on quality and storage life of these peaches. Fruits were packed in polypropylene (PP) trays and placed inside low density polyethylene (LDPE) bags (30, 50, 60, 75 µm thickness) with active modified atmosphere (10 kPa CO 2 + 1.5kPa O 2 , balance N 2 ). The control was made with peaches held in nonwrapped PP trays. Fruits were kept at 1 ± 1 °C and 90 ± 5% relative humidity (RH) for 28 days and CO 2 and O 2 within packages was monitored every two days. After 14, 21 and 28 days, samples were withdrawn from MAP and kept in air at 25 ± 1 °C and 90 ± 5% RH for ripening. On the day of removal from the cold storage and after 4 days, peaches were evaluated for weight loss, decay incidence, flesh firmness, woolliness incidence, soluble solids content (SSC), titratable acidity (TA) and juice content. The results showed that MAP had influence on reducing weight loss and prevented postharvest decay. MAP of 1-2 kPa O 2 and 3-6 kPa CO 2 at 1 ºC (from 50 and 60 µm LDPE films) were effective for keeping good quality of 'Douradão' peaches during 28 days of storage, the ripe fruits showed reduced incidence of woolliness, adequate juiciness and flesh firmness. Packages of 30 and 75 µm LDPE films were ineffective for reducing woolliness during cold storage. MAP fruits showed lower SSC and no relevant effect on TA. Control fruits did not present marketable conditions after 14 days of cold storage. Index terms: Prunus persica, LDPE, chilling injury, woolliness, storage life. USO DE ATMOSFERA MODIFICADA PARA ESTENDER O PERÍODO DE ESTOCAGEM DE PÊSSEGOS 'DOURADÃO'RESUMO -O pêssego 'Douradão' é um produto perecível e, quando armazenado sob refrigeração, está sujeito à injúria pelo frio. O objetivo deste trabalho foi avaliar o efeito da embalagem de atmosfera modificada (AM) na qualidade e na extensão da vida de estocagem destes pêssegos refrigerados. Os frutos foram acondicionados em bandejas de polipropileno (PP) e colocados dentro de sacos plásticos de polietileno de baixa densidade (PEBD) com espessuras de 30; 50; 60 e 75 µm e com modificação ativa da atmosfera (10 kPa CO 2 + 1.5 kPa O 2 , balance N 2 ). O tratamento controle foi feito com pêssegos acondicionados em bandejas de PP sem embalagem plástica. Os frutos foram mantidos em câmara a 1 ± 1 °C e 90 ± 5% de umidade relativa (UR) por 28 dias, e as concentrações de CO 2 e O 2 dentro das embalagens foram avaliadas a cada dois dias. Após 14; 21 e 28 dias, as embalagens plásticas foram retiradas, e as amostras foram mantidas em ar a 25 ± 1 °C e 90 ± 5% UR para amadurecimento. No dia da remoção e após 4 dias, os pêssegos foram avaliados quanto a perda de massa, incidência de podridão, firmeza da polpa, incidência de lanosidade, conteúdo de sólidos solúveis (CSS), acidez titulável (AT) e teor de suco. Os resultados mostraram que as embalagens de AM tiveram influência na red...

Changes in Fruit Quality Phytochemicals of Late-Mature Peach ‘Yonglian No.1’ during Storage

“…As a typical climacteric fruit, the preservation period of the ‘Yonglian No.1’ peach is short at room temperature. In peaches and nectarines, MAP slows down the respiration rate of fruits and retards the decrease in titratable acidity values, maintaining the fruit sugar and soluble solids content, flesh firmness, vitamin C and juice content, and slows deterioration through decreasing fruit injury and browning development [ 15 ]. This study demonstrated that MAP is an excellent addition to 4 ± 1 °C temperature management for extending the storage life of ‘Yonglian No.1’ peaches produced in Fujian province.…”

“…This has the effect of delaying ripening, suppresses the decay of fresh fruit, inhibits the degradation of chlorophyll and other pigments, and maintains the organoleptic properties and fresh-like characteristics of the fruit [ 12 , 13 , 14 ]. This could also have an influence on reducing the loss of weight and could prevent the postharvest decay of ‘Douradão’ peaches [ 15 ].…”

Enhancement of the antioxidant capacity and reduction of chilling injury in ‘Douradão’ peaches refrigerated under pre-storage and modified atmosphere

“…Choi and Lee (1997) observed a significant effect on the reduction of woolliness using a passive modified atmosphere in 'Yumyeong' peaches when the fruits were compared with unpackaged ones. Santana, Benedetti, Sigrist, and Sarantopóulos (2010) and Santana, Benedetti, Sigrist, and Sato (2011) observed a significant reduction in woolliness with the use of active modified atmosphere and LDPE packaging (with values of 1% O 2 and 3% CO 2 ).…”

“…However, changes in the levels of O 2 and CO 2 should not exceed the critical limit to prevent the occurrence of physiological disorders such as fermentation (Beaudry, 1999). Studies indicate that the use of passive modified atmosphere in peaches under cold storage reduces the loss of weight and firmness and may decrease chilling injuries in some cultivars (Santos, Castro, Picoli, & Rolim, 2008;Santana, Benedetti, Sigrist, & Sarantopóulos, 2010). After evaluating the use of polypropylene and polyethylene, Akbudak and Eris (2004) reported that these packages were efficient in maintaining the quality of 'Flavorcrest' peaches and 'Fantasia' nectarines for 30 and 45 days of storage, respectively.…”

Uso de diferentes embalagens e atmosferas modificadas no armazenamento pós-colheita de muricis in natura

“…Esta técnica consiste na redução do O 2 e aumento do CO 2 , reduzindo assim a síntese de etileno e, com isso, prolongando a vida pós-colheita dos frutos (Mendonça et al, 2015). Outros efeitos do uso dessa técnica em produtos frescos, durante a comercialização, podem incluir a redução da taxa respiratória, a minimização da perda de massa e a manutenção da cor e da firmeza, o que, consequentemente, pode contribuir para o retardo do amadurecimento (Santana et al, 2010).…”