Folate biofortification strategy by elicitation in kale baby leaves

Introduction: Humans cannot synthesize folates, so they must be acquired through dietary sources, with plants serving as a primary source. To enhance folate levels in vegetables, this study investigated the pre-harvest application of elicitors on kale ('Cavolo Nero') baby leaves under greenhouse-autumn conditions in Southern Italy. Methods: fluorescence), and compositional properties (nitrate, vitamin C, phenols, flavonoids, carotenoids, antioxidant capacity) were determined. Results: d.w.). Salicylic acid application enhanced antioxidant compounds (vitamin C, carotenoids) without modifying antioxidant capacity and nitrate levels. In contrast, phenylalanine decreased antioxidant compounds (phenols, vitamin C) along with antioxidant capacity, and enhanced nitrate level (+56%). Discussion: Considering the limited literature available on this topic, the present work provides an important first step toward producing folate-biofortified baby leaf vegetables with enhanced beneficial traits.