Artemisia arborescens Essential Oil Composition, Enantiomeric Distribution, and Antimicrobial Activity from Different Wild Populations from the Mediterranean Area

Mohammed El-Amin Said (1) , Marcello Militello (2) , Sergio Saia (3) , Luca Settanni (2) , Aurora Aleo (4) , Caterina Mammina (4) , Isabelle Bombarda (1) , Pierre Vanloot (1) , Christian Roussel (5) , Nathalie Dupuy (1)

1 LISA - Laboratoire d'Instrumentation et Sciences Analytiques
2 Department of Agricultural and Forest Sciences
3 CREA - Consiglio per la Ricerca in Agricoltura e l’analisi dell’economia agraria = Council for Agricultural Research and Economics
4 Sciences for Health Promotion
5 ISM2 - Institut des Sciences Moléculaires de Marseille

Aerial parts of Artemisiaarborescens were collected from different sites of the Mediterranean area (southwestern Algeria and southern Italy) and the chemical composition of their essential oil (EO) extracted by hydrodistillation was studied by both gas chromatography (GC) equipped with an enantioselective capillary column and GC/mass spectrometry (GC/MS). The EOs obtained were tested against several Listeriamonocytogenes strains. Using GC and GC/MS, 41 compounds were identified, accounting for 96.0-98.8% of the total EO. All EOs showed a similar terpene profile, which was rich in chamazulene, -thujone, and camphor. However, the concentration of such compounds varied among the EOs. A.arborescens EO inhibited up to 83.3% of the L.monocytogenes strains, but the inhibitory spectrum varied among the EOs, with those from Algeria showing a higher inhibition degree than the Italian EOs. Such effect likely depended on the ketone (-thujone+camphor) content of the EO. The differences in the EO composition support the hypothesis that A.arborescens has at least two different chemotypes: a -thujone and a chamazulene type. The EO inhibitory spectrum indicates the A.arborescens EO as a valuable option in the control of the food-borne pathogens. Artemisiaarborescens Essential Oil Composition, Enantiomeric Distribution, and Antimicrobial Activity from Different Wild Populations from the Mediterranean Area

Mots clés: Enantiomeric distribution; Biological activity; Gram-negative bacteria; Volatile composition; Listeria monocytogenes

Domaines: Chimie

Mohammed El-Amin Said, Marcello Militello, Sergio Saia, Luca Settanni, Aurora Aleo, et al.. Artemisia arborescens Essential Oil Composition, Enantiomeric Distribution, and Antimicrobial Activity from Different Wild Populations from the Mediterranean Area. Chemistry and Biodiversity, 2016, 13 (8), pp.1095 - 1102. ⟨10.1002/cbdv.201500510⟩. ⟨hal-01442580⟩