Effect of Geographic Location, Ontogenesis on Essential Oil Composition and Spontaneously Emitted Volatile Organic Compounds of Inula viscosa (L.) Greuter. (Astraceae) Grown in Jordan

The present study aimed at investigating the variation in the chemical composition of emitted volatile organic compounds (VOCs) and essential oils obtained from fresh aerial parts of Inula viscosa (Asteraceae) as affected by growth stage and geographical location zone. VOCs were extracted by solid phase microextraction (SPME) method from whole aerial parts of I. viscosa during the vegetative (spring-August) period, and from fresh leaves, closed …