Abstract
Abstract: The objective of this work was to evaluate cold storage periods and postharvest longevity of the seedless table grape 'BRS Vitória' subjected to the application of the disease-resistance inducer acibenzolar-S-methyl (ASM). Bunches were treated or not with 1% ASM, placed individually in plastic clamshell trays and stored in a cold chamber at 2±1ºC, at a high relative humidity, for three periods (30, 45, and 60 days), followed by a 5-day period of shelf life in plastic clamshells, at 22±2ºC. After each storage period, gray mold (Botrytis cinerea) incidence was evaluated, and the physicochemical analysis was performed. A completely randomized design, with four replicates, was used in two 2x3 factorial arrangements: one evaluating ASM application and cold storage periods; and another, ASM and cold storage + shelf-life periods. ASM did not change the physicochemical characteristics of the bunches, and the incidence of gray mold was lower than 1% in all treatments. Water loss from bunches increased with storage periods. Even without ASM application, 'BRS Vitória' grape can preserve its postharvest quality for up to 60 days of cold storage, plus five days of shelf life in plastic clamshells.
Highlights
Table grapes consumption has increased in the last years, specially the red and black ones, since they are one of the most important sources of phenolic compounds, which are free radicals scavengers (Orak, 2007; Rastija et al, 2009).The 'BRS Vitória' seedless grape (Vitis spp.), recently released in Brazil, is recommended for cultivation in tropical and subtropical areas, with excellent horticultural performance, high-bud fecundity, and tolerance to downy mildew, the most important disease which affects grapevines in humid subtropical areas
ASM application had no influence on the evaluated variables in 'BRS Vitória' table grape, and differences among treatments were observed only for cold storage and cold storage and shelf life periods
Gray mold incidence was not observed at the end of the cold storage periods; a very low decay (
Summary
Table grapes consumption has increased in the last years, specially the red and black ones, since they are one of the most important sources of phenolic compounds, which are free radicals scavengers (Orak, 2007; Rastija et al, 2009).The 'BRS Vitória' seedless grape (Vitis spp.), recently released in Brazil, is recommended for cultivation in tropical and subtropical areas, with excellent horticultural performance, high-bud fecundity, and tolerance to downy mildew, the most important disease which affects grapevines in humid subtropical areas. There is a lack of information for the use of ASM associated to different cold storage periods, to improve postharvest longevity of table grapes. The objective of this work was to evaluate cold storage periods and postharvest longevity of the new seedless table grape 'BRS Vitória' subjected to ASM application.
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