ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Phenolic profile, antioxidant activity and antimicrobial properties of avocado (Persea americana) seed extracts

Carmen Miramontes-Corona, Gabriela Torres-Santiago, Marcela M. J. Rodriguez, Rosa I. Corona-González, and Guillermo Toriz

Transdisciplinary Research and Services Institute (ITRANS), University of Guadalajara, Zapopan, Mexico

E-mail: carmen.miramontes@academicos.udg.mx

Received: 25 November 2023  Accepted: 6 April 2024

Abstract:

The metabolic profiles of seed extracts from two cultivars of avocado (Hass var. and Criollo var., thereafter Hass and Criollo) were obtained using FTIR and ¹H NMR spectroscopies. The extracts can be regarded as a rich source of bioactive compounds with significant antioxidant and antimicrobial properties. The extraction yields was 25.5% for Hass and 17.5% for Criollo. Total phenolic content and antioxidant activity were higher for Hass (287.41 ± 1.36 mg GAE/g dry extract and 1329.48 ± 6.89 μmol Fe + 2/g dry seed) as compared to Criollo (207.01 ± 1.38 mg GAE/g dry extract and 1276.18 ± 6.4 μmol Fe + 2/g dry seed). Also, the composition of the extracts was determined by using UPLC-ESI-QTOF-MS/MS. Eleven compounds were identified in both extracts, which included mainly phenolic acids, epicatechin derivatives and flavonoids. These compounds were correlated to the profiles obtained with FTIR and ¹H NMR. A higher inhibition growth of S. aureus was observed for Hass extracts. The results obtained here suggest that avocado seeds from Hass variant are a substantial source of bioactive compounds, which may have significant potential in the food industry.

Keywords: Avocado seeds; Antioxidants; Antimicrobial; ESI-QTOF-MS/MS; 1H NMR; FTIR

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-024-03452-z

Chemical Papers 78 (8) 5061–5069 (2024)