نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم باغبانی و فضای سبز، دانشکده کشاورزی، دانشکدگان کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران
2 گروه مهندسی علوم باغبانی و فضای سبز، دانشکده کشاورزی، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Climate changes and long periods of drought has caused that many studies focuses on drought tolerance plants. Kakootie-koohi (Ziziphora clinopodioides) is known as an important medicinal plant in herbal medicine and treatment of respiratory diseases. Besides having vast geographical distribution in Iran, it has conspicuous morphological and phytochemical diversities. To investigate the effect of water stress upon growth and phytochemical traits of Kakootie-koohi, a field experiment was performed as a split plot in the form of a complete randomized design with three replications. Different levels of irrigation were assigned as first factor including irrigation at 90-100% available water, stopping irrigation at vegetative stage and stopping irrigation at flowering stage, and different ecotypes assigned as second factor named as Galoogah, Taleghan, Kaboodarahang, Shazand and Velian. At the 50% flowering stage, the plants were harvested for desired traits measurements. Essence of treated plants were extracted by Clevenger apparatus and the components of the essence were determined and quantified using GC and GC-Mass. Inducing water stress at both stages caused a significant increase in percentage and yield of essential oil. The maximum amount of essential oil yield obtained in Galoogah, Taleghan and Velian ecotypes. The most dominant essential oil component was pulegone and its maximum amount (39.9%) was observed in plants of Taleghan ecotype under drought stress at vegetative stages. It can be concluded that there is a possibility of improving yield of essential oils in Kakootie-koohi by stopping irrigation at vegetative or flowering stages.
کلیدواژه‌ها [English]
)