Fruit-extract coating keeps grapes fresher in cold storage
Food Forest
If you grow table grapes on a backyard arbor, a simple edible coating made from starch and berry extract could help your harvest stay firm and flavorful for weeks longer in the fridge without synthetic preservatives.
Researchers made a thin, edible coating from a starch called maltodextrin, mixed with tiny potassium carbonate particles and extract from Pyracantha berries (the ornamental shrub with bright red-orange fruit). Dipping 'Rish Baba' grapes in this coating before cold storage helped the fruit hold onto its vitamins, antioxidants, and crisp texture longer than untreated grapes. It's a promising, more natural alternative to the chemical treatments growers often use to keep grapes looking and tasting good after harvest.
Key Findings
Maltodextrin-based coating combined with potassium nanocarbonate and Pyracantha extract slowed quality decline in 'Rish Baba' grapes during cold storage
Treated grapes retained higher levels of bioactive compounds (antioxidants/phenolics) compared to uncoated controls
The coating approach shows potential as a natural, edible alternative to synthetic postharvest preservatives for table grapes
chevron_right Technical Summary
Coating grapes with a starch-based film containing potassium nanocarbonate and Pyracantha berry extract kept them fresher and more nutritious during cold storage, offering a low-chemical way to extend shelf life.
Species Mentioned
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A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus Vitis. Grapes are a non-climacteric type of fruit, generally occurring in clusters.