sulphur dioxide sheet and cold storage synergy for post-harvest management of thompson seedless grapes (vitis vinifera)

Purpose: this study examined the influence of various storage conditions on thompson seedless (vitis vinifera) grapes quality. research method: grapes were stored under four conditions: control (room temperature i.e., 20-22°c, no so2), t1 with so2 sheets at room temperature i.e., 20-22°c, t2 with so2 sheets in cold storage at 1°c and t3 without so2 sheets in cold storage at 1°c. changes in acidity, total soluble solids (tss), total anthocyanin content, total phenols, sugars (glucose and fructose), trans-resveratrol, decay %, weight loss % and antioxidant activity were monitored over 60 days. findings: the findings revealed a synergistic effect between so2 and cold storage. grapes stored with both so2 sheets and cold storage (t1) exhibited the slowest decline in anthocyanin, phenols and antioxidant activity of 211.06 mg/l, 2102.39 mg/l and 7.19 mm dpph, respectively after 60 days. t1 grapes found to have slower reduction in sugars and trans-resveratrol concentration i.e., 15.47 to 15.37 g/100ml and 695 to 516 µg/g, respectively compared to control samples 15.47 to 14.81 g/100ml and 695 to 500 µg/g, respectively. research limitations: the study focused solely on storage conditions of thompson seedless variety grapes, limiting the generalizability of the findings to different grape varieties and maturity levels. originality/value: these results highlighted the importance of proper storage techniques, particularly the combined use of so2 and cold storage, for maintaining grape quality and extending shelf life.