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Type: Artigo de periódico
Title: Effects Of Modified Atmosphere Packaging On Ripening Of 'douradão' Peach Related To Pectolytic Enzymes Activities And Chilling Injury Symptoms [efeitos Da Embalagem Sob Atmosfera Modificada No Amadurecimento De Pêssego 'douradão' Relativos às Atividades Das Enzimas Pectinolíticas E Sintomas De Danos Causados Pelo Frio]
Author: de Santana L.R.R.
Benedetti B.C.
Sigrist J.M.M.
Sato H.H.
Abstract: The present study evaluated the effects of modified atmosphere packaging on inhibition of the development of chilling injury symptoms in 'Douradão' peach after cold storage and the possible involvement of cell wall enzymes. Fruits were harvested at the middle stadium of ripening, packed in polypropylene trays and placed inside low density polyethylene (LDPE) bags (30, 50, 60 and 75 μm of thickness) with active modified atmosphere (10 kPa CO 2 + 1.5 kPa O 2, balance N 2). The following treatments were tested: Control: peaches held in nonwrapped trays; MA30: LDPE film - 30 μm; MA50: LDPE film - 50 μm; MA60: LDPE film - 60 μm and MA75: LDPE film - 75 μm. Fruits were kept at 1±1°C and 90±5% relative humidity (RH) for 28 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 After 14, 21 and 28 days, samples were withdrawn from MAP and kept in air at 25±1°C and 90±5% RH for ripening.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 and after 4 days, peaches were evaluated for woolliness incidence, pectolytic enzymes activities. The respiratory rate and ethylene synthesis were monitored during 6 days of ripening. The results showed that MA50 and MA60 treatments had positive effect on the inhibition of the development of woolly texture and reduced pectin methylesterase activity on the ripe fruits, keeping good quality of 'Douradão' peach during 28 days of cold storage. The treatments Control, MA30 and MA75 showed higher woolliness incidence and did not present marketable conditions after 14 days of cold storage.
Rights: aberto
Identifier DOI: 10.1590/S0100-29452011000400006
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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