Abstract
ABSTRACT The chemical properties of Helichrysum italicum (Roth) G.Don. (common name ‘immortelle’), depend largely on the cultivation type, climatic conditions, and cultivation methods. The time and the harvesting method are crucial for enhancing the quality of essential oils. This investigation aimed to evaluate how harvesting month affects the amount and quality of essential oils (EOs). The results showed that the qualitative properties of the essential oil were influenced by the method of harvest (by hand or by machine) and, harvesting time. Harvesting by machine gave better γ-curcumene content, and harvesting by hand gave better a-pinene and neryl acetate quality. It is also observed that Reactive Oxygen Species (ROS) production under machine harvesting raised lipid peroxidation of membranes. In general, better qualitative properties of immortelle essential oil were obtained from manual harvesting.
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