Abstract
The essential oil yield, volatile profile and antioxidant activity, of 37 samples collected from the Rosmarinus officinalis shrubs growing wild in the different ecosystems of the provinces of Taourirt and Jerada (Oriental region in the east of Morocco), were studied in order to determine the effect of the habitat and how the vegetal associations are influencing the volatile variability of their essential oil. The essential oil compositions were determined by gas chromatography-mass spectrometry (GC-MS). The yield of the essential oil extraction ranged from 1.09 to 2.81 %. The major components found were 1.8-cineol (37.71-65.02 %), camphor (6.09-27.49 %), α-pinene (3.08-9.98 %) and β-pinene (2.83-11.7 %). The interpretation of these results revealed that the variability is attributed to varieties and genetic background rather than the ecosystems. The antioxidant activity was determined by 1,1-diphenyl-1-picrylhydrazyl (DPPH) assay which revealed a strong radical scavenging capacity for all the samples with some variability which can be explained by the variability of the content of monoterpenes oxygenated.
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