Pre-harvest application of proline, methionine, and melatonin improves shelf-life and maintains nutritional quality of Brassica oleracea florets during cold storage

The reduction in shelf-life and nutritional value of cauliflower florets are the most vital problems during cold storage. This research was performed to explore impact pre-harvest foliar implementation proline (PR), methionine (MT), melatonin (ML), at a rate 25 mg.L−1, on active composites (cv. ‘Arasya’) stored 10 °C for 14 d. obtained results exhibited that from treated plants with PR, MT, ML were lower water loss, electrolyte leakage, browning index, titratable acidity (TA) compared untreated plants, end Furthermore, these treatments significantly slow down loss total sugar content, reducing sugar, soluble solid (TSS), glucosinolates concentration (Gly), phenols (TP), vitamin C (VC), antioxidant activity (DPPH) than control samples. After days storage, application improved levels phenylalanine ammonia-lyase (PAL), catalase (CAT) as well declined polyphenol oxidase (PPO), peroxidase (POD) activates Therefore, might be promising substances keep quality forests reduce index