Effect of delactosed whey permeate treatment on physico-chemical, sensorial, nutritional and microbial properties of whole tomatoes during postharvest storage

► Effect of DWP on antioxidants and quality of whole tomatoes has been examined. ► DWP treatment inhibited the loss of firmness of whole tomatoes stored for 21 days. ► DWP treated tomatoes had higher vitamin C, total phenols and antioxidant activity. ► DWP treatment reduced the growth of total aerobic counts and yeast and moulds. ► DWP treatment could be used to extend the shelf-life of whole tomatoes.