Iranian Journal of Medicinal and Aromatic Plants Research

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A comparison of quantitative and qualitative essential oil yield in different species of thyme (Thymus spp.) in the natural habitats of Kurdistan province

Document Type : Research Paper

Authors

1 , Natural Resources Research Branch, Kordestan Agricultural and Natural Resources Research Center, Agricultural Research, Education and Extension Organization (AREEO), Sanandaj, Iran

2 Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

Abstract

This study was conducted to evaluate the essential oil (EO) quality and quantity of six thyme species (Thymus spp.), growing in the natural habitats of Kurdistan province, in 2010. To conduct this research, six species of thyme were identified in different habitats and used for essential oil extraction. Water distillation (Clevenger-type apparatus) was used to obtain the EOs and the components were identified using the gas chromatography (GC) system and a gas chromatograph connected to mass spectrometer (GC/MS). The results showed that more than 30 components were identified in the EOs, among which thymol, carvacrol, geraniol, alpha terpinole and linalool were the most important components. The EO yields were 3.05%, 2.53%, 2.83%, 1.51%, 1.31% and 1.05% for T. fallax, T. daenensis, T. pubescens, T. transcaucasicus, T. fedtschenkoi and T. kotschyanus, respectively. The content of thymol was calculated to be 70.6%, 62.2%, 27.8% and 1.5 in the EOs of T. daenensis, T. fedtschenkoi, T. pubescens and T. kotschyanus, respectivelyand the content of carvacrol was recorded to be 3.43%, 4.80% and 0.74% in the EOs of T. daenensis, T. fedtschenkoi and T. pubescens, respectively.

Keywords

References
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Iranian Journal of Medicinal and Aromatic Plants Research
Volume 34, Issue 5 - Serial Number 91
November and December 2018
Pages 748-756
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