Effect of growth stage on essential-oil yield and composition of Daucus sahariensis.
The essential oils obtained by hydrodistillation from Daucus sahariensis Murb. harvested at three different growth stages were characterized by GC/MS analysis. In total, 88 compounds were identified, with myristicin (29.8-51.7%), myrcene (6.7-31.1%), α-pinene (11.6-14.8%), and limonene (5.3-11.5%) as main constituents. Monoterpene hydrocarbons were the most represented compounds in the oils of the plant samples collected during the flower-budding and full-flowering periods. On the contrary, during the fruiting stage, the oils were dominated by phenylpropanoids. The essential oils were subject of considerable variation in their composition during the various developmental stages, particularly concerning the content of myrcene that decreased significantly passing from the vegetative to the fruiting stage. Conversely, for myristicin, the opposite trend was observed. Furthermore, the essential-oil yields were quite low during the flower-budding phase (0.27%), but rapidly increased during plant development (0.63 and 0.68% for the flowering and fruiting phases, resp.).
Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, University of Pisa, Via Bonanno 33, I-56126 Pisa.
Guido
G
Flamini
Tahar
T
Smaili
Amar
A
Zellagui
Noureddine
N
Gherraf
Pier Luigi
PL
Cioni
D000080462:Acyclic Monoterpenes; D000475:Alkenes / Q000032:analysis / Q000378:metabolism; D000081248:Allylbenzene Derivatives; D019661:Apiaceae / Q000737:chemistry* / Q000254:growth & development*; D001593:Benzyl Compounds / Q000032:analysis / Q000378:metabolism; D000081008:Bicyclic Monoterpenes; D053138:Cyclohexenes / Q000032:analysis / Q000378:metabolism; D004148:Dioxolanes / Q000032:analysis / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry; D000077222:Limonene; D039821:Monoterpenes / Q000032:analysis / Q000378:metabolism; D009822:Oils, Volatile / Q000032:analysis* / Q000378:metabolism; D010938:Plant Oils / Q000032:analysis* / Q000378:metabolism; D011748:Pyrogallol / Q000031:analogs & derivatives / Q000032:analysis / Q000378:metabolism; D013729:Terpenes / Q000032:analysis / Q000378:metabolism
D000080462:Acyclic Monoterpenes; D000475:Alkenes; D000081248:Allylbenzene Derivatives; D001593:Benzyl Compounds; D000081008:Bicyclic Monoterpenes; D053138:Cyclohexenes; D004148:Dioxolanes; D039821:Monoterpenes; D009822:Oils, Volatile; D010938:Plant Oils; D013729:Terpenes; D011748:Pyrogallol; C005246:myristicin; C509595:myrcene; D000077222:Limonene; C005451:alpha-pinene
Daucus sahariensis; Essential oils; Myrcene; Myristicin