Quantitative and qualitative changes of essential oil of Zosimia absinthifolia (Vent.) Link. in different phenological stages

Zosimia absinthifolia (Vent.) Link.is a permanent herb that belongs to Umbelliferae family and grows wild in Iran. The plant materials were collected from Alshtar in North of Lorestan province at three stages including before flowering, full flowering and fruiting stages and subjected to hydrodistillation using a Cleavenger type apparatus for 3h. Yields of essential oil were 0.4%, 0.6% and 0.8% w/w before flowering, full flowering and fruiting stages, respectively. Fourty seven, thirty eigth and thirty seven compounds were identified in oils before flowering, full flowering and fruiting stages, respectively. n-octanol, germacrene-D, β-caryophyllene, octyl acetate, caryophyllene oxide, α-pinene and limonene were the main components of essential oil of different growth stages.