بررسی بازده و ترکیبات اسانس گیاه سنبله‌ای دماوندی (Stachys laxa) در دو رویشگاه گدوک و بلده استان مازندران

In this study, the medicinal species Stachys laxa from the Lamiaceae family, which is native to Iran and grows in the northern part of the country, was studied to investigate the percentage of yield and chemical compositions of its essential oil. For this purpose, the aerial parts of the plant were randomly collected in three plant populations with three replications from two habitats, Gaduk and Baladeh, in Mazandaran Province. Soil samples were also collected from a depth of 0-30 cm. After transferring the samples to the laboratory, the plant essential oil was extracted by Clevenger apparatus and its compositions were determined using a GC-MS device. There were a total of 17 common compounds in all essential oil samples, among which α-Pinene, β-Pinene, Myrtenyl acetote, and Hexadecanoic acid had the highest amounts. The percentage of essential oil yield in the Gaduk habitat was significantly (P≤0.01) higher than in the Baladeh habitat. The soil texture in the Baladeh region was loamy silty and in the Gaduk region it was loamy, and the percentage of soil moisture, pH, EC, K, Ca, Mg and Cao in the Baladeh region was significantly (p≤0.01) higher than in the Gaduk region. In general, the results showed that soil factors significantly affect the synthesis of plant active ingredients and have a significant correlation with the percentage of essential oil yield and the compounds Sabinene, β- Pinene, α -terpinenyl acetate, Myrtenyl acetote, Spathulenol, Hexadecanoic acid, Limonene, Linalool, Bicycle [3.1.1] heptan-3, Germacrene D and Hexahydrofarnesyl acetone.