Asghari Gholamreza, Gholamali Houshfar, Mahmoudi Zahra, Asghari Matin
Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences, Isfahan, IR Iran.
Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, IR Iran.
Jundishapur J Nat Pharm Prod. 2014 Feb;9(1):35-8. doi: 10.17795/jjnpp-12229. Epub 2014 Feb 20.
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.
刺环菊（Pycnocycla spinosa Decne. ex Boiss）是一种芳香植物，对离体回肠收缩有松弛作用且具有止泻活性。从刺环菊精油中已提取出34种成分，其中几种主要成分呈现季节性变化。
本研究旨在评估该植物精油成分在一天中特定时间段的日变化情况。
在一天中的不同时间采集刺环菊样本。采用气相色谱（GC）和气相色谱 - 质谱联用（GC/MS）对采集的刺环菊地上部分经水蒸馏得到的精油进行分析。
鉴定出14种单萜类和9种倍半萜类成分，其中波动成分有对伞花烃、反式-β-罗勒烯、β-香茅醇、香茅基戊酸酯、香叶基异戊酸酯、α-葎草烯、氧化石竹烯、α-杜松醇和α-桉叶醇。精油中对伞花烃在一天不同时间的含量为0.16%至4.19%，香叶基异戊酸酯为7.75%至23.99%。
根据植物一天中的采收时间可获得不同品质的精油。
