Variation of Yield and Chemical Composition of Essential Oil from Cupressus lusitanica Growing in Different Agro-ecological Zones of Rwanda

Chemical composition and essential oil contents among oil-bearing plants are mostly influenced by different factors including ecological features of habitat. In this study, variation in yield chemical oils (EOs) from the leaves Cupressus lusitanica Mill. (Cupressaceae) regions Rwanda was investigated. Extraction fresh C. collected March 2021 April, three zones Rwanda, Buberuka highland zone (Burera), Central plateau (Huye) Eastern savannah (Kayonza) realized through steam distillation. The compositions distilled EOs were analyzed using both Fourier transform infrared (FT-IR) spectroscopy gas chromatography-mass spectrometry (GC-MS), while their yields determined simple calculus. average 0.27 ± 0.02, 0.34 0.02 0.39 0.01% (v/w) for Burera, Huye Kayonza, respectively. Results FT-IR analysis confirmed those GC-MS analysis, indicated presence groups compounds aliphatic alkanes, carboxylic acids, alkenes, aldehydes, aromatics ketones EOs. results revealed that sabinene (20.84%), myrcene (19.63%), ?-pinene (10.23%) ?-3-carene (10.13%) dominant constituents Burera. Umbellulone (24.21%), (16.76%), (10.54%) (8.21%) main Huye, ?-terpinene (18.77%), umbellulone (18.16%), isobornyl acetate (9.972%), (7.20%) major components Kayonza. current demonstrated an intraspecific content profile one geographical region to another. observed variations due interactions species with climatic environmental conditions However, it could also be effects various biotic factors, as well maturity plant stage growth. Further studies needed establish influence geo-climatic on each single component