Effect of high hydrostatic pressure and drying methods on phenolic compounds profile of jabuticaba (Myrciaria jaboticaba) peel and seed

Abstract

Jabuticaba is a Brazilian berry rich in phenolic compounds (PC), which are mainly concentrated in its peel and seed (JPS), fractions that are not usually consumed. Thus, to develop a powder with potential functional properties, we investigated the effect of pressurization and dehydration methods on the chemical composition of JPS, with emphasis on PC. JPS showed a very diverse PC profile, including phenolic acids, flavonoids, ellagitannins and proanthocyanidins. Contrary to our hypothesis, pressurization was ineffective in increasing total PC contents of JPS. Freeze-drying and oven-drying at 75 °C yielded powders with similar total PC contents, but with distinct profile, the former richer in anthocyanins and the latter in ellagitannins. Considering that both dehydration methods produced a jabuticaba powder rich in PC, and that freeze-drying is a higher cost method, the choice between these drying methods depends on the purpose of the final product.

Keywords: Anthocyanins; Catechin (PubChem CID 9064); Cyanidin-3-O-glucoside (PubChem CID441667); Delphinidin-3-O-glucoside (PubChem CID 443650); Ellagic acid (PubChem CID 5281855); Ellagitannins; Freeze-drying; Gallic acid (PubChem CID 370); Gallocatechin (PubChem CID 65084); Myricetin-3-O-rhamnoside (PubChem CID 5352000); Oven-drying; Polyphenoloxidase; Proanthocyanidins; Quercetin-3-O-rutinoside (PubChem CID 5280805); Valoneic acid dilactone (PubChem CID 10151874); Vescalagin/Castalagin (PubChem CID 168165).