title: Efficacy of 1-methylcyclopropene on the mitigation of storage disorders of "Rocha" pear under normal refrigerated and controlled atmospheres.
abstract: Alternatives are needed for long-term preservation of European pears (Pyrus communis L.) after the ban on diphenylamine. "Rocha" pear fruit harvested at commercial maturity were treated with 1-methylcyclopropene (1-methylcyclopropene, SmartFresh™) and diphenylamine and stored at 0 ℃, 90-95% relative humidity, under normal atmosphere for up to six months or under controlled atmosphere (controlled atmosphere, 3 kPa O2 + 0.7 kPa CO2) for up to 9.4 months. At 312 nl l(-1), 1-methylcyclopropene reduced softening and yellowing, and increased soluble solids content during shelf life in comparison with fruit treated with diphenylamine. 1-Methylcyclopropene at 312 nl l(-1) was also more effective than diphenylamine in reducing superficial scald and internal browning disorders. 1-Methylcyclopropene at 150 nl l(-1) had little effect on ripening-related changes but was effective against physiological disorders of pears stored in regular atmosphere or under controlled atmosphere. Delayed controlled atmosphere slightly reduced internal browning disorders but increased superficial scald. 1-Methylcyclopropene at 312 nl l(-1) reduced physiological disorders in "Rocha" pear under refrigerated storage and delayed ripening-related softening and color changes during shelf life. At 150 nl l(-1), 1-methylcyclopropene is as effective as diphenylamine against storage disorders without ripening impairment.
authors.affiliation: Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal dalmeida@isa.ulisboa.pt.
authors.forename: Domingos Pf
authors.initials: DP
authors.lastname: Almeida
authors.affiliation: Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal.
authors.forename: Rita
authors.initials: R
authors.lastname: Carvalho
authors.affiliation: AgroFresh Inc., Barcelona, Spain.
authors.forename: Eve
authors.initials: E
authors.lastname: Dupille
mesh_terms: D003080:Cold Temperature; D003521:Cyclopropanes / Q000008:administration & dosage*; D004159:Diphenylamine / Q000008:administration & dosage; D005030:Ethylenes; D005519:Food Preservation / Q000379:methods*; D063427:Food Quality; D005638:Fruit / Q000737:chemistry / Q000254:growth & development; D015416:Maillard Reaction / Q000187:drug effects; D010937:Plant Growth Regulators; D011174:Portugal; D031989:Pyrus
chemical_list: D003521:Cyclopropanes; D005030:Ethylenes; D010937:Plant Growth Regulators; D004159:Diphenylamine; C412563:1-methylcyclopropene
keywords: Diphenylamine; Pyrus communis; internal browning; postharvest treatment; storage disorders; superficial scald