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Evaluation of the Essential Oil Content of Cretan Dittany Cultivated in Northern Greece

Catherine Argyropoulou, Marilena Papadatou, Catherine Grigoriadou, Eleni Maloupa and Helen Skaltsa

Origanum dictamnus was cultivated at the Laboratory of Conservation and Evaluation of the Native and Floricultural Species (North Greece), far away from the island of Crete (South Greece) where it is growing wild. After one year of cultivation dittany barks/leaves and flowers were analyzed on the basis of their essential oils (yield and quality) for two subsequent years. The essential oils from different parts of the plants were obtained by hydrodistillation in a modified Clevenger-type apparatus, and their chemical analyses were performed by GC and GC-MS. The essential oil yield (1.05-3.14%) and content did not show a negative response to cultivation. Carvacrol was shown to be the main constituent in all samples (45.3-75.1%), with its percentages increasing at the second year of cultivation.