Efficacy of 1-methylcyclopropene on the mitigation of storage disorders of 'Rocha' pear under normal refrigerated and controlled atmospheres

摘要

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, 3kPa O-2+0.7kPa CO2) for up to 9.4 months. At 312nll(-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 312nll(-1) was also more effective than diphenylamine in reducing superficial scald and internal browning disorders. 1-Methylcyclopropene at 150nll(-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 312nll(-1) reduced physiological disorders in Rocha pear under refrigerated storage and delayed ripening-related softening and color changes during shelf life. At 150nll(-1), 1-methylcyclopropene is as effective as diphenylamine against storage disorders without ripening impairment.