CHEMICAL COMPOSITION, ANTIOXIDANT ACTIVITY AND FUNGISTATIC EFFECT AGAINST Candida albicans OF THE ESSENTIAL OIL OF Piper aduncum L. "MATICO"

Abstract

The essential oil was obtained from leaves of Piper aduncum L. "matico" from in Department of Loreto by steam distillation with a yield of 1.1% v/w. The chemical composition has determined by chromatography/mass spectrometry (GC/MS). Thirty-five chemical components were identified, of which eight represent 76,53 % of the total area. The main volatile compounds are phenylpropanoids (1, 2, 4-trimethoxy-5- (1-propenyl) -benzene (39,32%) and methyleugenol (12,85%)), sesquiterpenoid hydrocarbons (germacrene D (7,52%), bicyclogermacrene (5,88%), β-caryophyllene (2,82%) and δ-cadinene (2,81%)), a monoterpenoid hydrocarbon (β-ocimene (2,34%)) and an oxygenated monoterpenoid (4,7,7-trimethylbicyclo [2.2.1] heptan-3-one (2,99%)). The antioxidant activity was evaluated by DPPH● and ABTS●+ radical scavenging methods. The antioxidant capacity equivalent to Trolox (TEAC-DPPH) (TEAC-ABTS) was 1.839 and 17.79 μg Trolox/mg of the essential oil, respectively. The fungistatic effect was evaluated by colorimetric broth microdilution method, showing activity with a MIC of 1.24 mg/ mL. The results show that although the antioxidant activity and the fungistatic effect of the essential oil of Piper aduncum L. were limited, however, the high content of phenylpropanoids makes it a promising candidate for future research.