BACKGROUND Plums are much appreciated by consumers as fresh fruit but have a limited storage life. Since reactive oxygen species (ROS) are associated with fruit ripening, an increase in ROS scavenging antioxidant systems could lead to a delay in postharvest plum ripening and in maintaining fruit quality after long cold storage. RESULTS CONCLUSION Results showed that crop yield (kg per tree) and fruit weight were enhanced by preharvest oxalic acid (OA) treatment of plum cultivars ('Black Splendor' and 'Royal Rosa'), although the on-tree ripening process was delayed. In addition, the ripening process during cold storage was delayed in plums from OA-treated tress, manifested by lower firmness and acidity losses and reduced ethylene production, as compared with fruits from control trees. Antioxidant compounds (phenolics, anthocyanins and carotenoids) and the activity of antioxidant enzymes were higher in plums from OA-treated trees than in controls, at harvest and during 50 days of cold storage. OA preharvest treatment could be a useful tool to maintain plum quality properties during long-term storage, by delaying the postharvest ripening process through a delay in ethylene production, with an additional effect on increasing bioactive compounds with health beneficial effects. (c) 2018 Society of Chemical Industry
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Univ Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Postharvest & Refrigerat Grp UPCT, Paseo Alfonso 13,48, Cartagena 30203, SpainUniv Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Martinez-Sanchez, Ascension
Lozano-Pastor, Pedro
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Verdimed, Dept Res & Dev, San Javier 30730, SpainUniv Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Lozano-Pastor, Pedro
Artes-Hernandez, Francisco
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Univ Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Postharvest & Refrigerat Grp UPCT, Paseo Alfonso 13,48, Cartagena 30203, SpainUniv Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Artes-Hernandez, Francisco
Artes, Francisco
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Univ Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Postharvest & Refrigerat Grp UPCT, Paseo Alfonso 13,48, Cartagena 30203, SpainUniv Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Artes, Francisco
Aguayo, Encarna
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Univ Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain
Postharvest & Refrigerat Grp UPCT, Paseo Alfonso 13,48, Cartagena 30203, SpainUniv Politecn Cartagena UPCT, Inst Plant Biotechnol, Food Qual & Hlth Grp, Campus Muralla del Mar, Cartagena 30202, Spain