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Chemical characterization, antioxidant capacity and antimicrobial activity against food related microorganisms of Citrus limon var. pompia leaf essential oil

Fancello, Francesco and Petretto, Giacomo Luigi and Zara, Severino and Sanna, Maria Lina and Addis, Roberta and Maldini, Mariateresa and Foddai, Marzia and Rourke, Jonathan P. and Chessa, Mario and Pintore, Giorgio Antonio Mario (2016) Chemical characterization, antioxidant capacity and antimicrobial activity against food related microorganisms of Citrus limon var. pompia leaf essential oil. LWT - Food Science and Technology, Vol. 69 , p. 579-585. ISSN 0023-6438. Article.

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DOI: 10.1016/j.lwt.2016.02.018

Abstract

In this study, leaves of Citrus limon var. pompia (pompia) were subjected to hydro-distillation and an essential oil (EO) was obtained. Gas chromatographic analysis allowed us to determine its chemical composition, both qualitatively and quantitatively: the major compounds in the EO were limonene, geranial and neral. In vitro DPPH and ABTS assays, conducted on the EO, demonstrate its ability to act as an antioxidant. The antimicrobial activity of the EO against 12 bacteria and 4 yeasts was tested by a microdilution broth test; in addition the effect on maximum growth rate (μ) and lag phase (λ) was assessed. Results show a low inhibitory activity against food grade and Lactobacillus strains, whereas Listeria monocytogenes and Staphylococcus aureus were inhibited at low EO concentration. The pompia EO demonstrated an antimicrobial activity against yeast, with Saccharomyces cerevisiae being the most sensitive strain. The pompia EO, even at sub-MIC concentration, negatively affects the microbial growth rate (μ) and delayed the lag phase on all pathogens microbial strains tested, except Candida albicans 3993.

Item Type:Article
ID Code:11263
Status:Published
Refereed:Yes
Uncontrolled Keywords:Lactic acid bacteria, antioxidant activity, antilisterial agent, GRAS compounds, chemical composition
Subjects:Area 05 - Scienze biologiche > BIO/15 Biologia farmaceutica
Area 07 - Scienze agrarie e veterinarie > AGR/16 Microbiologia agraria
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Publisher:Elsevier
ISSN:0023-6438
Deposited On:18 Mar 2016 09:23

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