Comparison of Antioxidant and Free Radical Scavenging Activities of the Essential Oils from Flowers and Fruits of Otostegia persica Boiss
- 15 October 2007
- journal article
- research article
- Published by Science Alert in Pakistan Journal of Biological Sciences
- Vol. 10 (21), 3895-3899
- https://doi.org/10.3923/pjbs.2007.3895.3899
Abstract
The aerial parts of the endemic plant of Otostegia persica Boiss. in two different stages of flowering and fruiting were hydro-distilled to extract oils in the yields of 0.3 and 0.15% (v/w), respectively. The oils were analyzed by GC and GC/MS. Twenty-eight and thirty-one components were identified, representing 97.59 and 94.61% of the oils, respectively. The main compounds of the essential oil flowers (EOFL) were alpha-pinene (17.21%), 1-octen,3-ol (13.44%) and cubenol (7.27%), whereas diisooctyl phthalate (45%) and hexadecanoic acid (11.07%) were the major constituents of the essential oil of the fruits (EOFR). The oils were screened for their possible antioxidant activities by two complementary test systems, namely DPPH free radical-scavenging and ammonium thiocyanate. In both tested systems, EOFL exerted greater antioxidant and radical scavenging activity. In the first case, EOFL exerted antioxidant activity with an IC50 19.8 +/- 1.8 microg mL(-1) almost similar to BHA and ascorbic acid (15.2 +/- 1.1 and 17.4 +/- 1.3), respectively. In the ammonium thiocyanate system, the inhibition rate of oxidation of linoleic acid for EOFL was estimated 93.5 +/- 2.8. The higher activity of this oil in comparison to EOFR may be attributed to its high content of monoterpenes, especially oxygenated ones in the oil of the flowers.Keywords
This publication has 12 references indexed in Scilit:
- Antioxidant and antiacetylcholinesterase activities of five plants used as Portuguese food spicesFood Chemistry, 2007
- Cytotoxic, antioxidant and antibacterial activities of Varthemia iphionoides Boiss. extractsJournal of Ethnopharmacology, 2006
- Comparative evaluation of 11 essential oils of different origin as functional antioxidants, antiradicals and antimicrobials in foodsFood Chemistry, 2005
- Dietary Polyphenols and the Prevention of DiseasesCritical Reviews in Food Science and Nutrition, 2005
- Antimicrobial and antioxidant activities of the essential oil and various extracts of Salvia tomentosa Miller (Lamiaceae)Food Chemistry, 2005
- Methodological considerations for characterizing potential antioxidant actions of bioactive components in plant foodsMutation Research, 2003
- Antioxidant activity of Nigella sativa essential oilPhytotherapy Research, 2000
- Antioxidant activity of selected essential oil components in two lipid model systemsFood Chemistry, 2000
- Antioxidative curcuminoids from rhizomes of Curcuma xanthorrhizaPhytochemistry, 1992
- Monoterpene content in Origanum syriacum as affected by environmental conditions and floweringPhysiologia Plantarum, 1992