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A Comparative Study of Antimicrobial and Antioxidant Activities of Plant Essential Oils and Extracts as Candidate Ingredients for Edible Coatings to Control Decay in 'Wonderful' Pomegranate.
- Source :
-
Molecules (Basel, Switzerland) [Molecules] 2021 Jun 02; Vol. 26 (11). Date of Electronic Publication: 2021 Jun 02. - Publication Year :
- 2021
-
Abstract
- This study determined the antimicrobial and antioxidant activity of lemongrass (LO), thyme (TO), and oregano (OO) essential oils and ethanolic extracts of pomegranate peel (PPE) and grape pomace (GPE) as candidate ingredients for edible coatings. Antifungal effects against Botrytis   cinerea and Penicillium spp. were tested using paper disc and well diffusion methods. Radical scavenging activity (RSA) was evaluated using 2,2-diphenyl-1-picrylhydrazyl and 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonic acid assays. Gas chromatography-mass spectrometry analysis identified limonene (16.59%), α-citral (27.45%), β-citral (27.43%), thymol (33.31%), paracymene (43.26%), 1,8-cineole (17.53%), and trans-caryphellene (60.84%) as major compounds of the essential oils. From both paper disc and well diffusion methods, LO recorded the widest zone of inhibition against tested microbes ( B. cinerea and Penicillium spp.). The minimum inhibitory concentrations of LO against B. cinerea and Penicillium spp., were 15 µL/mL and 30 µL/mL, respectively. The highest (69.95%) and lowest (1.64%) RSA at 1 mg/mL were recorded for PPE and OO. Application of sodium alginate and chitosan-based coatings formulated with LO (15 or 30 µL/mL) completely inhibited spore germination and reduced the decay severity of 'Wonderful' pomegranate. Lemongrass oil proved to be a potential antifungal agent for edible coatings developed to extend shelf life of 'Wonderful' pomegranate.
- Subjects :
- Anti-Infective Agents chemistry
Antioxidants chemistry
Botrytis drug effects
Gas Chromatography-Mass Spectrometry
Microbial Sensitivity Tests
Oils, Volatile chemistry
Penicillium drug effects
Plant Oils chemistry
Plant Oils pharmacology
Spores, Fungal drug effects
Terpenes
Anti-Infective Agents pharmacology
Antioxidants pharmacology
Cymbopogon chemistry
Oils, Volatile pharmacology
Origanum chemistry
Thymus Plant chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1420-3049
- Volume :
- 26
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Molecules (Basel, Switzerland)
- Publication Type :
- Academic Journal
- Accession number :
- 34199618
- Full Text :
- https://doi.org/10.3390/molecules26113367