Pomegranate (Punica granatum L.) peel extracts as antimicrobial and antioxidant additives used in alfalfa sprouts

Aqueous and ethanolic pomegranate peel extracts (PPE) were studied as a source of phenolic compounds with antimicrobial, anti-quorum sensing, and antioxidant properties. The aqueous extract showed higher total phenolic and flavonoid content (153.43 mg GAE/g and 45.74, respectively) and antioxidant c...

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Detalles Bibliográficos
Autores: Cruz-Valenzuela, Manuel Reynaldo, Ayala-Soto, Rosa E., Ayala-Zavala, J. Fernando, Espinoza-Silva, Brenda A., González-Aguilar, Gustavo A., Martín Belloso, Olga, Soliva-Fortuny, Robert, Nazzaro, Filomena, Fratianni, Florinda, Tapia-Rodríguez, Melvin R., Bernal-Mercado, Ariadna Thalia
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/84374
Acceso en línea:https://doi.org/10.3390/foods11172588
http://hdl.handle.net/10459.1/84374
Access Level:acceso abierto
Palabra clave:Food byproduct
Phenolic compounds
Anti-quorum sensing agents
Natural food additive
Added value
Descripción
Sumario:Aqueous and ethanolic pomegranate peel extracts (PPE) were studied as a source of phenolic compounds with antimicrobial, anti-quorum sensing, and antioxidant properties. The aqueous extract showed higher total phenolic and flavonoid content (153.43 mg GAE/g and 45.74, respectively) and antioxidant capacity (DPPH radical inhibition: 86.12%, ABTS radical scavenging capacity: 958.21 mg TE/dw) compared to the ethanolic extract. The main phenolic compounds identified by UPLC-DAD were chlorogenic and gallic acids. The aqueous PPE extract showed antimicrobial activity against Listeria monocytogenes, Salmonella Typhimurium, Candida tropicalis (MICs 19–30 mg/mL), and anti-quorum sensing activity expressed as inhibition of Chromobacterium violaceum violacein production (%). The aqueous PPE extracts at 25 mg/mL applied on alfalfa sprouts reduced psychrophilic bacteria (1.12 Log CFU/100 g) and total coliforms (1.23 Log CFU/100 g) and increased the antioxidant capacity of the treated sprouts (55.13 mol TE/100 g (DPPH) and 126.56 mol TE/100 g (ABTS)) compared to untreated alfalfa. This study emphasizes PPE’s antioxidant and antimicrobial activities in alfalfa sprouts preservation.

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