Antimicrobial, antioxidant, volatile and phenolic profiles of cabbage-stalk and pineapple-crown flour revealed by GC-MS and UPLC-MS E

Unconventional parts of vegetables represent a rich source of health-promoting phytochemicals. The phenolic profile of cabbage-stalk flour (CSF), pineapple-crown flour (PCF), and their essential oils were characterized via UPLC-ESI-QTOF-MS and GC-FID/MS. Antimicrobial activity was tested against fiv...

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Bibliographic Details
Published in:Food chemistry 2021-03, Vol.339, p.127882
Main Authors: Brito, T B N, R S Lima, L, B Santos, M C, A Moreira, R F, Cameron, L C, C Fai, A E, S L Ferreira, M
Format: Article
Language:English
Subjects:
Ananas - chemistry
Ananas - metabolism
Anti-Infective Agents - analysis
Anti-Infective Agents - pharmacology
Antioxidants - chemistry
Brassica - chemistry
Brassica - metabolism
Chromatography, High Pressure Liquid
Discriminant Analysis
Flour - analysis
Gas Chromatography-Mass Spectrometry
Gram-Negative Bacteria - drug effects
Gram-Positive Bacteria - drug effects
Oils, Volatile - analysis
Oils, Volatile - chemistry
Phenols - analysis
Phenols - chemistry
Phenols - pharmacology
Plant Extracts - chemistry
Plant Extracts - pharmacology
Principal Component Analysis
Spectrometry, Mass, Electrospray Ionization
Volatile Organic Compounds - analysis
Volatile Organic Compounds - chemistry
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Summary:Unconventional parts of vegetables represent a rich source of health-promoting phytochemicals. The phenolic profile of cabbage-stalk flour (CSF), pineapple-crown flour (PCF), and their essential oils were characterized via UPLC-ESI-QTOF-MS and GC-FID/MS. Antimicrobial activity was tested against five strains, and antioxidant activities were determined in free and bound extracts. Globally, 177 phenolics were tentatively identified in PCF (major p-coumaric acid, ferulic acid, and 4-hydroxybenzaldehyde) and 56 in CSF (major chlorogenicacid, quercetin 3-O-glucuronide, and p-coumaric acid). PCF exhibited a distinguished profile (lignans, stilbenes) and antioxidant capacity, especially in bound extracts (1.3 g GAE.100 g ; 0.6 g catechin eq.100 g ; DPPH: 244.7; ABTS: 467.8; FRAP: 762.6 µg TE.g , ORAC: 40.9 mg TE.g ). The main classes of volatile compounds were fatty acids, their esters, and terpenes in CSF (30) and PCF (41). A comprehensive metabolomic approach revealed CSF and PCF as a promising source of PC, showing great antioxidant and discrete antimicrobial activities.
ISSN:1873-7072