Abstract
Pycnocycla spinosa Decne. ex Boiss is an aromatic plant which showed relaxant effects on isolated ileum contractions and antidiarrheal activity. Thirty four components have been extracted from P. spinosa essential oil, of which several major constituents were found to show seasonal variation. The aim of this work is to evaluate the diurnal variation of its oil constituents during specific hours of the day. The Pycnocycla spinosa samples were collected at different times of the day. The hydro-distilled aerial parts oils of collected P. spinosa were analyzed by GC and GC/MS. Fourteen monoterpenoid and nine sesquiterpenoid components were identified, of which the fluctuating constituents were p-cymene, trans-β-ocimene, β-citronellol, citronellyl pentanoate, geranyl isovalerate, α-humulene, caryophyllen oxide, α-cadinol, and α-eudesmol. The content of p-cymene in the essential oil in different daily times varied from 0.16 to 4.19%, and the geranyl isovalerate 7.75 -23.99%. Essential oils with different qualities can be obtained according to the harvest time of the plant in a day.
Highlights
Pycnocycla spinosa Decne. ex Boiss is an aromatic plant which showed relaxant effects on isolated ileum contractions and antidiarrheal activity
This paper reports the diurnal variation of the essential oil from aerial parts of the plant
Several studies on aromatic plants have shown that the essential oil composition may vary considerably throughout a year [27, 28]
Summary
Pycnocycla spinosa Decne. ex Boiss is an aromatic plant which showed relaxant effects on isolated ileum contractions and antidiarrheal activity. Ex Boiss is an aromatic plant which showed relaxant effects on isolated ileum contractions and antidiarrheal activity. Thirty four components have been extracted from P. spinosa essential oil, of which several major constituents were found to show seasonal variation. It was reported that the essential oil and extract of P. spinosa have relaxant effects on isolated ileum contractions in relatively low concentration. The hydrodistilled aerial parts oil of Pycnocycla spinosa was analyzed and thirty-four components have been identified. The most abundant constituents identified in the essential oil are geranyl isopantanoate, caryophyllene oxide, β-eudesmol, citronellol, elemicin, p-cymene, citronellyl acetate, α-cadinol, nonadecane, sabinene, octanal, δ-candinene, methyl eugenol, decanal, trans-β-ocimene, limonene, trans-caryophyllene and octadecane respectively, of which several major constituents were found to show seasonal variation [5, 6].
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