Effect of Solution Conductivity on the Volatile Constituents of Origanum dictamnus L. in Nutrient Film Culture

The chemical composition of the essential oils obtained from leaves and bracts of hydroponically cultivated Origanum dictamnus L. (Cretan dittany), growing under various electrical conductivity (EC) levels (2.0, 4.0, and 6.0 mS/cm), was studied, using the nutrient film technique (NFT). The analysis...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2005-03, Vol.53 (5), p.1656-1660
Main Authors: Economakis, Costas, Karioti, Anastasia, Skaltsa, Helen, Perdetzoglou, Dimitrios, Demetzos, Costas
Format: Article
Language:English
Subjects:
Aroma and flavouring agent industries
Benzoquinones - analysis
Biological and medical sciences
bracts
chemical composition
Electric Conductivity
electrical conductivity
essential oils
Food industries
Fundamental and applied biological sciences. Psychology
gas chromatography
Gas Chromatography-Mass Spectrometry
leaves
mass spectrometry
medicinal plants
Monoterpenes - analysis
nutrient film technique
nutrient solutions
Oils, Volatile - chemistry
Origanum - chemistry
Origanum dictamnus
Plant Leaves - chemistry
Solutions - chemistry
volatile organic compounds
Volatilization
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Summary:The chemical composition of the essential oils obtained from leaves and bracts of hydroponically cultivated Origanum dictamnus L. (Cretan dittany), growing under various electrical conductivity (EC) levels (2.0, 4.0, and 6.0 mS/cm), was studied, using the nutrient film technique (NFT). The analysis of the essential oil content was achieved by GC-MS technique, and totals of 41 and 38 different compounds were identified in both cases of large-leaved and narrow-leaved samples of leaves and bracts, respectively. Differences in the composition content and of the percentage of each of the constituents in the two studied samples (i.e., large-leaved and narrow-leaved) and within the essential oils of leaves and bracts in both samples were observed. Carvacrol and p-cymene were identified as the main constituents in all essential oils, whereas thymoquinone was found in higher percentage in the essential oils of large-leaved than in narrow-leaved plants. The results obtained from GC-MS analysis were submitted to chemometric analysis, and a phenotypic similarity of the essential oils of narrow-leaved O. dictamnus was observed, whereas the essential oils of large-leaved O. dictamnus showed two separate subgroups Keywords: Origanum dictamnus essential oil; hydroponic cultivation; electrical conductivity; GC-MS
ISSN:0021-8561
1520-5118
DOI:10.1021/jf040365t