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Abstract
The chemotaxonomic significance of the enantiomeric composition of monoterpenes was investigated in selected species of Origanum, Salvia, and Rosmarinus genera. The combination of SPME-chiral-GC-MS analysis and two-dimensional hierarchical cluster analysis provided a fast, easy, and reliable method to discriminate between species with similar morphological appearance or between different cultivars in the same species.
Using the enantiomeric ratio of monoterpenes instead of the relative percentage of compounds in total volatiles permitted us to distinguish clearly between the closely related Israeli aromatic plants O. dayi and O. ramonense, and between three selected R. officinalis commercial cultivars.