Evaluation of phytochemical diversity of Cuminum cyminum L. essential oil components collected from different farms in Khorasan Razavi province

Iran is one of the richest sources of medicinal plants in the world due to its high climatic diversity. Cumin is one of the most important and economical medicinal plants of the Umbelliferae family, which has a high distribution in different parts of the country and is one of the most important export plants of Iran. This study was conducted to investigate the quantitative and qualitative diversity of cumin essential oil in Khorasan Razavi province in 2018-2019. For this purpose, seeds were collected from farms in 6 different regions of the province at the harvest time. Seeds were extracted by water distillation for 2 hours. Gas chromatography (GC) and gas chromatography-mass spectrometry (GC / MS) devices were used to identify the essential oil compounds and determine their percentage. Nine compounds in the essential oils of Gonabad (N1), Neishabour (N2), Taybad (N3) and Khoshab (N4), 15 compounds in the essential oils of plants in Fariman region (N5) and finally 13 compounds in the essential oils of Dargaz region (N6) were identified. In total, 9 compounds; gamma-terpinene-7-al, cuminaldehyde, terpinene-4-ol, gamma-terpinene, α-phellandrene, p-cymene, sabinene, β-Pinene, α-Pinene were common in cumin essential oil extracted from 6 regions of Khorasan Razavi province. The two compounds cis-dihydrocarvone and (E) -Caryophyllene were identified exclusively in region (N5) with of 0.45% and 0.19%, respectively. α-thujene, α-terpinene, limonene and 1,8-cineol were obtained only from essential oils of (N5) and (N6).