Biostimulatory Action of Vegetal Protein Hydrolysate and the Configuration of Fruit Physicochemical Characteristics in Grafted Watermelon

Foliar application of a vegetal-derived protein hydrolysate as biostimulant was assessed for possible interaction with the ripening diploid watermelon grafted onto interspecific hybrid rootstock. Assessment encompassed crop performance; fruit morphometric and sensory quality traits; soluble carbohydrates; macrominerals; bioactive composition at 10, 20, 30, 40, 50 days post anthesis (dpa). The effect on yield components confounded by vigorous rootstock effect. Pulp firmness declined precipitously cell enlargement from 10 to 30 dpa, phyto-hormonal potential rind thickness masked grafting. colorimetry determined solely peaked 40 dpa. reduced lycopene content 8% compared control. Total sugars coevolved solids content, then stabilized. Fructose glucose prevailed during rapid growth dpa sucrose advanced ripeness between 40–50 whereas acidity 20 decreased. Potassium, which most abundant micromineral, before full process is not granted, least regarding conditions this study carried out under. absence might relate vigorousness, physiology, or type used.