Int. J. Biosci.3(4), 208-212, April 2013
One of the most important endemic medicinal species of Iran is Thymus daenesis. This plant grows by itself in many places. The aim of this study was determination of the most suitable time for harvesting of aerial part so that we can have maximum percent and yield of essential oil. This study had been done as factorial experiment in complete randomized block design with two factors, 3 times of harvesting(at the beginning of flowering, middle of flowering and end of flowering)and three distances of bushes in row(30, 50 and 70 cm)and 3 replications during one year (2011-2012). Traits under study were wet weight of aerial part, dry weight of aerial part, percent and yield of essential. Results showed that effect of harvesting time was significant for all traits. Means comparison of dry weight of aerial part of pant by Duncan’s test showed that the highest value for this trait was obtained at the end of flowering with 125.47 g/m2.Also, the highest percent and yield of essential oil equal to 2.76% and3.505 g/m2were observed at the end of flowering.
Andrikopoulos Nk, Antonopoulou S, Kaliora AC. 2002. Oleuropein Inhibits LDL Oxidation Induced by Cooking Oil Frying By-products and Platelet Aggregation Induced by Platelet-Activating Factor. LWT-Food Science and Technology 35, 479-484.
Bahreininejad B, Mohammadi A, Darvish Q. 2005. Effect of density of planting and date of harvesting on yield phenology of Thymus. Final report of research. Institute of Forest and Pasture Research, Tehran. Iran.
Benzie IFF. 1996. Lipid per oxidation: A review of causes, measurement and dietary influences. International Journal of Food Science and Nutrition. Inter. International Journal of Food Sciences and Nutrition 47, 233-261.
Djeridane A, Yousfi M, Nadjemi B, Boutassouna D, Stocker P, Vidal N. 2006. Antioxidant activity of some algerian medicinal plants extracts containing phenolic compounds. Food Chemistry 97, 659-660.
Donnelly JK, Robinson DS. 1995. Free radicals in foods. Free Radical Research 22, 147-176.
Jamzadeh Z. 2001 Thymus. Institute of Forest and Pasture Research, Tehran. Iran.
Mcgimpsey JA. Duglas MH. Vankink JW. Beauregard DA. Perry NB. 1994. Seasonal Variation in essential oil yield and composition.
Mohammadi A, Sepehri A. 2004. Effect of some ecological factors on effective compositions of thymus. 2nd congress on drug plant. Tehran Uni.
Naghdibadi H, Yazdani A., Nazari D, Mohammadali FS. 2002. Seasonal variation of yield and compositions of thymus essential oil at different densities. Pharmaceutical plants 56, 5-51.
Omidbeighi R. 2000. Production and Processing of Drug Plants. Astan-e GhodsRazavi Press.
Proestos C, Boziaris IS, Nychas GJE, Komitis M. 2006. Analysis of flavonoides and phenolic acids in Greek aromatic plants: Investigation of their antioxidant and antimicrobial activity. Food Chemistry 95(4), 664_671.
Robbins RJ, Bean SR. 2004. Development of a quantitative high performance liquid chromatography photodiodes array detection measurement system for phenolic acids. Journal of Chromatogry A. 1038, 97-105.
Soler_Rivas C, Espin JC, Wichers HJ. 2000. Oleuropein and related compound. Journal of Science Food and Agriculture 80(7), 1013_1023.