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Effects of Rootstock and Postharvest Treatments on Quality of Grapefruit Cultivars during Storage

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2007 ASAE Annual Meeting  072506.(doi:10.13031/2013.23390)
Authors:   M Soleimani, L Tabil, A Mirmajidi, A R Shafieezargar
Keywords:   Citrus, decay, physiology, respiration, storage, rootstock

Citrus cultivars in Iran are generally grafted on sour orange rootstocks. However, no study has been conducted to investigate the effects of rootstock and postharvest treatments and their interactions with fruit cultivar on storability and qualitative properties of grapefruit. In this study, the influence of 4 factors of cultivar, rootstock (Citrus volckameriana, Carizo citrange, Swingle citromelo, and Sour orange (Citrus aurantium), postharvest treatments (control, waxing fruit with a formulated shellac resin-based wax, treatment with Rovral TS solution, and combination of Rovral treatment and coating) and storage duration (1.5, 3 and 4.5 months) were investigated on the basis of full factorial experiments on weight loss, moldy contamination, average respiration, firmness, total soluble solids (TSS), acidity and ascorbic acid content of the two grapefruit cultivars, namely Marsh seedless and Ruby red. Results of the experiments indicated that rootstock could be effective on some qualitative properties of the stored fruit. Also, the bio-based wax was effective in controlling respiration and contamination as well as deterioration during long term (4.5 months) storage.

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