Cited by 522Essential Oils and Antimicrobial ActivityAntimicrobial agents and applicationsInsect Pest Control Strategies

Antibacterial and antioxidant activity of essential oil terpenes against pathogenic and spoilage-forming bacteria and cell structure-activity relationships evaluated by SEM microscopy

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Zengin, Hatice, Baysal, Ayse·2014·Molecules

Abstract

The antibacterial activity and antioxidant effect of the compounds α-terpineol, linalool, eucalyptol and α-pinene obtained from essential oils (EOs), against pathogenic and spoilage forming bacteria were determined. The antibacterial activities of these compounds were observed in vitro on four Gram-negative and three Gram-positive strains. S. putrefaciens was the most resistant bacteria to all tested components, with MIC values of 2% or higher, whereas E. coli O157:H7 was the most sensitive strain among the tested bacteria. Eucalyptol extended the lag phase of S. Typhimurium, E. coli O157:H7 and S. aureus at the concentrations of 0.7%, 0.6% and 1%, respectively. In vitro cell growth experiments showed the tested compounds had toxic effects on all bacterial species with different level of potency. Synergistic and additive effects were observed at least one dose pair of combination against S. Typhimurium, E. coli O157:H7 and S. aureus, however antagonistic effects were not found in these combinations. The results of this first study are encouraging for further investigations on mechanisms of antimicrobial activity of these EO components.

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Crossref · 10.3390/molecules191117773

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  • The potential effect of essential oils on rumen fermentation and methanogenesis is mainly mediated by their antimicrobial activities owing to their interaction with cell membranes of microbes by disrupting membrane stability of the lipid bilayer.

    “The potential effect of EO on rumen fermentation and methanogenesis is mainly mediated by their antimicrobial activities owing to their interaction with cell membranes of microbes (by disrupting membrane stability of lipid bilayer).”

    From Phytogenic Additives Can Modulate Rumen Microbiome to Mediate Fermentation Kinetics and Methanogenesis Through Exploiting Diet–Microbe Interaction (2020) · cites this paper as [232]

    Section 2.2 describes monoterpenes entering bacterial membranes and increasing membrane fluidity and permeability; section 2.5 reports membrane damage after terpene treatment. These passages support the proposed antimicrobial mechanism, but the paper studies pathogenic and spoilage bacteria, not rumen fermentation or methanogenesis. It does not establish that this mechanism mainly mediates effects on those rumen processes. (LLM, conf=0.87)

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  • Essential oils are most effective against gram-positive bacteria and possess almost no activity against gram-negative bacteria because of their hydrophilic bilayer, except thymol and carvacrol.

    “They are most effective against gram +ve bacteria and possess almost no activity against gram –ve (because of their hydrophilic bilayer) except thymol and carvacrol (232).”

    From Phytogenic Additives Can Modulate Rumen Microbiome to Mediate Fermentation Kinetics and Methanogenesis Through Exploiting Diet–Microbe Interaction (2020) · cites this paper as [232]

    Section 2.5 says Gram-positive bacteria are generally more sensitive to terpenes and explains how the hydrophilic surface of some Gram-negative bacteria can impede entry. But Section 2.2 reports that Gram-negative E. coli and Salmonella were inhibited by α-terpineol, linalool, and eucalyptol. The claim that Gram-negative bacteria have almost no susceptibility except to thymol and carvacrol overstates the source. (LLM, conf=0.90)

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Authors
Zengin, H., & Baysal, A.
Affiliations
  • Izmir Institute of Technology (TR)
  • Department of Food Engineering, Izmir Institute of Technology, Urla, Izmir 35437, Turkey
Venue
Molecules
Publisher
MDPI AG
Published
2014-11-03
Volume
19
Issue
11
Pages
17773-17798
ISSN
1420-3049 (ISSN-L)
OpenAlex
W1966480046
Cited by
519
References
65
Citations by year
2026: 31 · 2025: 54 · 2024: 56 · 2023: 59 · 2022: 50 · 2021: 43 · 2020: 72 · 2019: 55 · 2018: 42 · 2017: 30 · 2016: 19 · 2015: 8
FWCI
27.24
Type
journal article
Language
en
Open access
Locations
  • Molecules (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • IYTE GCRIS Database (Izmir Institute of Technology) (submittedVersion, other-oa)
  • İYTE (İZMİR YÜKSEK TEKNOLOJİ ENSTİTÜSÜ) (submittedVersion, other-oa)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
  • Physical Sciences › Chemistry › Organic Chemistry › Antimicrobial agents and applications
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Insect Pest Control Strategies
Keywords
antibacterial activity, antioxidant activity, α-terpineol, linalool, 1,8-cineole, α-pinene, pathogenic bacteria, synergistic and additive effects, Salmonella typhimurium, Escherichia coli O157:H7, Staphylococcus aureus, minimum inhibitory concentration, bacterial growth inhibition
MeSH terms
Eucalyptol, Acyclic Monoterpenes, Cyclohexane Monoterpenes, Bicyclic Monoterpenes, Anti-Bacterial Agents, Antioxidants, Bacteria, Cyclohexanols, Microscopy, Electron, Scanning, Oils, Volatile, Structure-Activity Relationship, Terpenes, Monoterpenes, Cyclohexenes

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