Tag Archives: Essential oil

xxx I. Sivicka, A. Adamovics, S. Ivanovs and E. Osinska
Some morphological and chemical characteristics of oregano (Origanum vulgare L.) in Latvia
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Some morphological and chemical characteristics of oregano (Origanum vulgare L.) in Latvia

I. Sivicka¹*, A. Adamovics¹, S. Ivanovs¹ and E. Osinska²

¹Latvia University of Life Sciences and Technologies, Liela iela 2, LV-3001 Jelgava, Latvia
²Warsaw University of Life Sciences, Nowoursynowska 159, PL02-776 Warsaw, Poland
*Correspondence: Irina.Sivicka@llu.lv

Abstract:

By European Cooperative Programme for Plant Genetic Resources (ECPGR), oregano (Origanum vulgare L.) is included on the list of priority species of medicinal and aromatic plants. In Latvia, it is important to cultivate oregano for keeping biodiversity and for meeting the needs of medicinal plant`s production. 44 accessions of oregano from the ex situ collection of genetic resources of medicinal and aromatic plants, attached to the Latvia University of Life Sciences and Technologies, were analysed during 2012–2014. Plants` morphological characteristics were described by the Draft Descriptor List of oregano, using the methodology of ECPGR. The essential oil was isolated using solvent-free microwave extraction method and analysed by gas chromatograph Hewlett Packard 6890 equipped with flame ionization detector FID and polar capillary column HP 20M. The results showed, that oregano accessions differ morphologically. Accessions are characterized with dense branching and the possibility to create big biomass. Local oregano is poor in content of essential oil, but 17 compounds were identified as the principal. As well as the correlation between the content of essential oil and colour of flowers in full flowering stage was observed – it is higher for accessions with dark flowers. Also, the influence of meteorological conditions per vegetation period (year) on chemical characteristics was significant (p < 0.05).

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1530-1547 K. Bahmani, A. Izadi Darbandi, D. Faleh Alfekaiki and M. Sticklen
Phytochemical Diversity of Fennel landraces from Various Growth Types and Origins
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Phytochemical Diversity of Fennel landraces from Various Growth Types and Origins

K. Bahmani¹, A. Izadi Darbandi¹*, D. Faleh Alfekaiki² and M. Sticklen³

¹Department of Agronomy and Plant Breeding Sciences, Aburaihan College, University of Tehran, IR 14174 Tehran, Iran
²Department of Food Sciences, Agriculture College, Basrah University, IQ 61004 Basrah, Iraq
³Department of Plant, Soil and Microbiology Sciences, Michigan State University, US 48823 East Lansing, USA
*Correspondence: aizady@ut.ac.ir

Abstract:

The presence of certain secondary metabolites in fennel essential oil is the cause of its pharmacological and flavoring properties. In this study phytochemical diversity including essential oil content and compositions of 26 fennel landraces from various growth types and geographical originations were assessed. Essential oil content of the fennel landraces varied from 1.1 to 4.8%; with late and medium maturities showing higher essential oil contents than early maturities. According to the Gas Chromatography Mass Spectrometry (GCMS) results, the main essential oil components were trans-anethole (1.2–88.4%), methyl chavicol (0.2–59.1%), fenchone (1.1–14.7%) and limonene (5.3–15.7%). According to the clustering results, it was noticed that all the fennel landraces originated from arid climates were trans-anethole chemotype with an average concentration of 76%. The early and late maturity fennels from humid climates were methyl chavicol chemotype with an average concentration of 54%. The late maturities from humid and moderate climates were fenchone chemotypes with 12% concentration, and finally the early and late maturities from semi-arid climates were limonene chemotype with 12% concentration. Our results confirm that climate is a major evolutionary determining factor on the phytochemical diversity of fennel landraces.

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