Chemical composition and biological activities of Salvia officinalis essential oil from Tunisia
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Date
2017-03-06
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Abstract
The aim of this study is to evaluate the chemical composition, antioxidant, antimicrobial,
insecticidal and allelopa- thic activities of Tunisia Salvia officinalis essential oil (SoEO). The
SoEO was characterized by the presence of 49 components with camphor (25.14 %), α-thujone (18.83
%), 1,8-cineole (14.14 %), viridiflorol (7.98 %), β-thu- jone (4.46 %) and β-caryophyllene (3.30 %)
as the major components, determined by gas chromatography-mass spectrometry. The level of
antioxidant activity, determined by complementary tests, namely 2,2-diphenyl-1-pic- rylhydrazyl
radical-scavenging (IC50= 6.7 mg/mL), linoleic acid peroxidation (IC50= 9.6 mg/mL) and ferric
reduc- ing assays (IC50= 28.4 mg/mL), was relatively moderate. The SoEO was also screened for its
antimicrobial activity. Good to moderate inhibitions were recorded for most of tested
microorganisms. It also exhibited important insec- ticidal activity against Spodoptera littoralis
larvae and Tribolium castaneum adults with LC50 values of 55.99 and
97.43 µl/L air, respectively. The effect of the SoEO on seeds germination and growth showed
different activities against radical and hypocotyl elongation of the tested species. These results
suggest the potential use of the SoEO
as natural antimicrobial preservative in cosmetic, pharmaceutical industry and in pest management.
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Keywords
salvia officinalis, essential oil, antioxidant, antimicrobial activity, insecticidal activity, phytotoxicity