title: Chemical Composition Variability of Essential Oils of Daucus gracilis Steinh. from Algeria.
abstract: The chemical compositions of 20 Algerian Daucus gracilis essential oils were investigated using GC-FID, GC/MS, and NMR analyses. Altogether, 47 compounds were identified, accounting for 90 - 99% of the total oil compositions. The main components were linalool (18; 12.5 - 22.6%), 2-methylbutyl 2-methylbutyrate (20; 9.2 - 20.2%), 2-methylbutyl isobutyrate (10; 4.2 - 12.2%), ammimajane (47; 2.6 - 37.1%), (E)-β-ocimene (15; 0.2 - 12.8%) and 3-methylbutyl isovalerate (19; 3.3 - 9.6%). The chemical composition of the essential oils obtained from separate organs was also studied. GC and GC/MS analysis of D. gracilis leaves and flowers allowed identifying 47 compounds, amounting to 92.3% and 94.1% of total oil composition, respectively. GC and GC/MS analysis of D. gracilis leaf and flower oils allowed identifying linalool (22.7%), 2-methylbutyl 2-methylbutyrate (18.9%), 2-methylbutyl isovalerate (13.6%), ammimajane (10.4%), 3-methylbutyl isovalerate (10.3%), (E)-β-ocimene (8.4%) and isopentyl 2-methylbutyrate (8.1%) as main components. The chemical variability of the Algerian oil samples was studied using statistical analysis, which allowed the discrimination of three main Groups. A direct correlation between the altitudes, nature of soils and the chemical compositions of the D. gracilis essential oils was evidenced.
authors.affiliation: Laboratoire des Substances Naturelles & Bioactives (LASNABIO), Département de Chimie, Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen, 13000, Algeria.
authors.forename: Batoul
authors.initials: B
authors.lastname: Benyelles
authors.affiliation: Laboratoire des Substances Naturelles & Bioactives (LASNABIO), Département de Chimie, Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen, 13000, Algeria.
authors.forename: Hocine
authors.initials: H
authors.lastname: Allali
authors.affiliation: Laboratoire des Substances Naturelles & Bioactives (LASNABIO), Département de Chimie, Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen, 13000, Algeria.
authors.forename: Mohamed El Amine
authors.initials: MEA
authors.lastname: Dib
authors.affiliation: Département de Chimie, Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen, 13000, Algeria.
authors.forename: Nassim
authors.initials: N
authors.lastname: Djabou
authors.affiliation: Laboratoire Chimie des Produits Naturels, Université de Corse, UMR CNRS 6134, Campus Grimaldi, BP 52, FR-20250, Corte, France.
authors.forename: Julien
authors.initials: J
authors.lastname: Paolini
authors.affiliation: Laboratoire Chimie des Produits Naturels, Université de Corse, UMR CNRS 6134, Campus Grimaldi, BP 52, FR-20250, Corte, France.
authors.forename: Jean
authors.initials: J
authors.lastname: Costa
mesh_terms: D000462:Algeria; D019661:Apiaceae / Q000737:chemistry*; D004777:Environment; D035264:Flowers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D009822:Oils, Volatile / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D009822:Oils, Volatile
keywords: 
  Daucus gracilis
  ; Altitudes; Ammimajane; Chemical variability; Essential oils; Nature soils