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Foods 2016, 5(4), 73; doi:10.3390/foods5040073

Antibacterial Activity of Fructus forsythia Essential Oil and the Application of EO-Loaded Nanoparticles to Food-Borne Pathogens

1,2,3,†
,
1,2,3,†
,
1,2,3
,
1,2,3
,
1,2,3
and
1,2,3,*
1
Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, 150040 Harbin, China
2
Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, 150040 Harbin, China
3
Collaborative Innovation Center for Development and Utilization of Forest Resources, Northeast Forestry University, 150040 Harbin, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Angel A. Carbonell-Barrachina
Received: 19 September 2016 / Revised: 17 October 2016 / Accepted: 24 October 2016 / Published: 29 October 2016
(This article belongs to the Special Issue Flavour Volatiles of Foods)
View Full-Text   |   Download PDF [1543 KB, uploaded 29 October 2016]   |  

Abstract

Fructus forsythia essential oil (FEO) with excellent antibacterial activity was rarely reported. The objective of the present study was to investigate the antibacterial activity and the antibacterial mechanism of FEO against two food-borne pathogenic bacteria, Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) in vitro. When treated FEO, the zones of inhibition (ZOI) of E. coli (20.5 ± 0.25 mm) and S. aureus (24.3 ± 0.21 mm) were much larger than control (p < 0.05). The minimum inhibitory concentrations (MICs) of FEO were 3.13 mg/mL and 1.56 mg/mL for E. coli and S. aureus, respectively. The antibacterial mechanism of FEO against E. coil was due to the changes in permeability and integrity of cell membrane leading to the leakage of nucleic acids and proteins. With the superior antibacterial activity of FEO, the nano-encapsulation method has been applied in FEO. When compared to FEO and blank chitosan nanoparticles, FEO-loaded nanoparticles (chitosan to FEO of 1:1) can effectively inhibit the growth of E. coil above 90% at room temperature. It is necessary to consider that FEO and FEO-loaded nanoparticles will become promising antibacterial additives for food preservative, cosmetic, and pharmaceutical applications. View Full-Text
Keywords: Forsythia suspense; Fructus forsythia essential oil; chitosan nanoparticles; antibacterial activity; antibacterial mechanism Forsythia suspense; Fructus forsythia essential oil; chitosan nanoparticles; antibacterial activity; antibacterial mechanism
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MDPI and ACS Style

Guo, N.; Gai, Q.-Y.; Jiao, J.; Wang, W.; Zu, Y.-G.; Fu, Y.-J. Antibacterial Activity of Fructus forsythia Essential Oil and the Application of EO-Loaded Nanoparticles to Food-Borne Pathogens. Foods 2016, 5, 73.

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