Effect of Phosphorus Concentration of the Nutrient Solution on the Volatile Constituents of Leaves and Bracts of Origanum dictamnus

Abstract

The chemical composition of the essential oils obtained from the leaves and bracts of hydroponically cultivated Origanum dictamnus were analyzed by GC-MS techniques. Three different concentrations of phosphorus (5, 30, and 60 mg/L) in the nutrient solution were used for the cultivation, using the nutrient film technique (NFT). A total of 46 different compounds were identified and significant differences (qualitative and quantitative) were observed between the samples. Carvacrol and p-cymene were identified as the main compounds in all samples analyzed, whereas thymoquinone was found in higher percentage in the leaves than in bracts. The essential oils were tested for their antibacterial activity against Gram-positive and Gram-negative bacteria. The oils obtained from the bracts were found to be more active. The results obtained from GC-MS analyses were submitted to chemometric analysis.

Extraction and analysis of antioxidant components from Origanum dictamnus

“…1 shows the extraction yields, expressed as g kg − 1 dictamnus on dry basis. The PE extracted 46.7 g kg − 1 of the dry herb that is higher than the essential oil usually recovered from the herb that amounts to 3-4% v/w (Economakis, Skaltsa, Demetzos, Sokovic, & Thanos, 2002). A following extraction with DE resulted in a lower yield than extraction with EAc.…”

Dittany of Crete: A botanical and ethnopharmacological review

“…The so-called character of the essential oil is defined from its major components. For O. dictamnus the major components of its essential oil are the monoterpenes: carvacrol, ␥-terpinene and p-cymene (Argyropoulou et al, 2009;Liolios et al, 2009;Chorianopoulos et al, 2004;Daferera et al, 2003;Daferera et al, 2002;Daferera et al, 2000;Figueredo et al, 2006;Economakis et al, 2005;Economakis et al, 2002;Economakis et al, 1999;Sivropoulou et al, 1996;Harvala et al, 1987;Katsiotis and Oikonomou, 1986;Scrubis, 1979;Schaden and Hesse, 1976). In most cases, carvacrol proved as the major component of the studied oils (Fig.…”

“…Because of its wide application as a traditional herbal medicinal product, it receives growing attention from modern pharmacology. There are various examples in recent literature where plant decoctions and the essential oils of O. dictamnus are tested for pharmacological effects (Pellecuer et al, 1980;Gergis et al, 1990;Economou et al, 1991;Panizzi et al, 1993;Lagouri and Boskou, 1996;Sivropoulou et al, 1996;Lionis et al, 1998;Moller et al, 1999;Economakis et al, 1999;Daferera et al, 2000;Karanika et al, 2001;Economakis et al, 2002;Goun et al, 2002;Couladis et al, 2003;Daferera et al, 2003;Stamatis et al, 2003;Chinou et al, 2007;Kouri et al, 2007;Liolios et al, 2009). Additionally, since it is characterized by the U.S.A. CFR (2009) as a safe spice for consumption, it can be easily applied as a natural additive in food industry, with flavouring, antioxidant or preservative role (Liolios et al, 2009).…”

Effect of NP and foliar spray on growth and chemical compositions of some medicinal Apiaceae plants grow in arid regions in Egypt

“…Three different concentrations of P (5, 30, and 60 mg L -1 ) in the nutrient solution were used for the cultivation of Origanum dictamnus, significant differences (qualitative and quantitative) were observed between the essential oil samples (Economakis et al, 2002).…”