Essential Oil Variation within and between Stachys inflata Benth. and Stachys lavandulifolia Vahl. Populations from Iran
By: Seyed Mehdi Shahgolzari, Afagh Yavari
Key Words: Essential oils, GC–MS, Stachys inflata, Stachys lavandulifolia.
J. Bio. Env. Sci. 8(2), 240-248, February 2016.
Although several species of Stachys possess characteristic essential oils, only a few published studies have described within and between populations of their volatile constituents. The aim of the present study was to evaluate the chemical composition of essential oils from two chemically unexplored Stachys species, Stachys lavandulifolia and Stachys inflata. Populations of these species were collected from Touyserkan, Hamedan province west of Iran. The essential oils of the dried flowering aerial parts of two species were isolated by hydrodistillation and analysed by means of GC and GC–MS. In this survey, 12 populations of both species were studied. Then data obtained were analyzed by Pc-ord software. 64 oil components were identified. 6, 10, 14-trimethyl-2-pentadecanone, Dibutylphthalate, isobutyl phthalate, spathulenol, trans-caryophyllene and α-copaene was observed in all populations of two species. δ-3-carene, Mytenal and α-thujene only in S. lavandulifolia and E-Citral (Geranial), n-docosane, neryl acetate, Nerylphenylacetate, Z-citral (Neral) only in S. inflata was observed. No similarity was observed between the chemical profile of essential oils obtained from S. lavandulifolia and S. inflata. The results of the present study indicated that essential oil components of S. lavandulifolia and S. inflata could be varied within and between populations.