Extraction and characterization of phytochemical compounds from araçazeiro (Psidium cattleianum) leaf: Putative antioxidant and antimicrobial properties
Giovana Paula Zandonáa, Lucíola Bagatinia,c, Natália Woloszynb, Juliane de Souza Cardosod, Jessica Fernanda Hoffmanna,e, Liziane Schittler Moronic, Francieli Moro Stefanellod, Alexander Jungesb, Cesar Valmor Rombaldia
Agroindustrial Science and Technology Department, Federal University of Pelotas, Capão do Leão Campus, s/n, Pelotas, RS 96010-900, Brazil.
Underexplored species have phytochemical potential for pharmacological and nutraceutical applications. The fruits of such species, including aracá (Psidium cattleianum Sabine), are rich in specialized metabolites with putative antioxidant and antimicrobial activity; therefore, the leaves of these species are also a potential source of bioactive compounds. In this study, araçazeiro leaves were extracted using an aqueous infusion (Al) and a pressurized liquid extraction system with water (PLE-W), ethanol (PLE-E), and 1:1 water:ethanol ratio combination (PLE-W:E). PLE-W:E yielded a greater diversity of extracted compounds. Nonetheless, all extracts showed inhibitory activity against pathogenic Gram-positive and Gram-negative bacteria and antioxidant activity in the in vitro thiobarbituric acid reactive substances (TBARS) and reactive oxygen species (ROS) assays with rat brain and yeast model systems. Thus, araçazeiro leaves can be exploited as a promising source of bioactive compounds.
Keywords: Pampa biome, Native species, Phytochemicals, Pressurized liquid extraction, Antioxidant, Antimicrobial.