Characterization of the Biological Potential of the Essential Oils from Five Species of Medicinal Plants

Abstract

Essential oils from Mentha piperita, Cymbopogon citratus, Rosmarinus officinalis, Peumus boldus and Foeniculum vulgare were extracted by hydrodistillation, chemically characterized and quantified by GC/MS and GC/FID. The principal componentes in the essential oil of M. piperita (carvone and limonene), C. citratus (geranial, neral and myrcene), R. officinalis (1,8-cineole, camphor and α-pinene), P. boldus (α-terpinyl formate, p-cymene and 1,8-cineole) and F. vulgare (methyl chavicol, limonene and fenchone) were identified. The oils were tested for antioxidant activity employing the DPPH (2,2-diphenyl-1-picryl-hydrazyl) radical-capture method, the oxidation of the β-carotene/linoleic acid system, and the ABTS radical-capture method. The essential oils were not effective. The antioxidant activities of the oils were determined by the hydroxyl method, and the highest activity (62.80%) was observed with the essential oil from M. piperita. Activities of 1.54 and 1.82 μg μg −1 , respectively, were observed for the essential oils from C. citratus and P. Boldus using the phosphomolybdenum method. No activity was observed with respect to reducing power. The essential oil from C. citratus was effective in inhibiting the growth of L. monocytogenes ( How to cite this paper: Rezende,

Assessment of Mentha piperita L. Essential Oil as Green Pesticide against Fungal and Insect Infestation of Chickpea

“…Rest other identified components were found in small or in trace amount (Table 1). The major component of MpEO is different from earlier findings where, p-mentha-6,8-dien-2-one (Afridi et al, 2016), menthone (Moghaddam et al, 2013), carvone (Rezende et al, 2017), limonene oxide (Mehani et al, 2015), etc. were reported as major components.…”

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“…The activity measured through stabilization of the ABTS• [2,2'‐azinobis (3‐ethylbenzthiazoline‐6‐sulfonic acid)] radical was determined according to a method described by Rezende et al To 1900 μL of the previously diluted ABTS• (Sigma‐Aldrich) radical, 100 μL of essential oil at different concentrations was added. The control reaction was prepared with 1900 μL of ethanol (Synth) and 100 μL of the most concentrated essential oil solution.…”

“…The activity measured through stabilization of the ABTS• [2,2'-azinobis (3-ethylbenzthiazoline-6-sulfonic acid)] radical was determined according to a method described by Rezende et al 12 To 1900…”

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