Endorsing and extending the repertory of nutraceutical and antioxidant sources in mangoes during postharvest shelf life

Mango byproducts, such as peels, contain high levels of antioxidants and fiber and represent important sources of nutraceuticals and pharmacological products. Fruit are collected at the mature green stage then stored and ripened, undergoing several structural and molecular changes over the course of this process. However, very little is known regarding the content and nature of antioxidant compounds in peels of elite and local cultivars during postharvest shelf life (PSL). We screened the phenolic compound content of six cultivars during PSL, including elite (Kent, Tommy, and Ataulfo) and local (Manila, Manililla, and Criollo) mangoes, using a targeted metabolomics approach. We determined that Ataulfo mangoes exhibited the highest content of phenolic compounds during PSL. Untargeted metabolomics and comparative proteomics in Ataulfo and Manililla showed these cultivars to be significant sources of phenolic and lipidic compounds, with the latter cultivar also representing an interesting candidate as a new source for nutraceutical products.