MAJOR COMPOUNDS OF ESSENTIAL OIL IN PLANT ORGANS OF A Tagetes coronopifolia Willd. POPULATION

Abstract

Tagetes coronopifolia Willd. is found on the Trans-Mexican Volcanic Belt and in some areas of Coahuila State. Its essential oil can be used for disease and pest control. From individual samples of root, stem-leaf and flower head of a plant population of T. coronopifolia located in Texcoco, México state, essential oils were obtained by hydro-distillation and analyzed by GC-MS. Major components (with 25 % or more of relative abundance) were: in root, 2,7,7-trimethylbicyclo[3.1.1] heptan-2-ol (100 %) and (1S, 2R, 5S)-4,6,6-trimethylbicyclo[3.1.1] hept-3-en-2-ol (verbenol) (38 %); in stem-leaf, (1S)-6,6-dimethyl-2-methylene-bicyclo [3.1.1] heptan-3-one (100 %), (1R)-cis-4,6,6-trimethylbicyclo-[3.1.1]hept-3-en-2-one (verbenone) (71 %), methyl 2-oxo-decanoate (54 %) and 2,7,7-trimethylbicyclo[3.1.1] hept-2-en-6-one (chrysantenone) (41 %); in flower head, (1S)-6,6-dimethyl-2-methylene-bicyclo[3.1.1]heptan-3-one (100 %) and verbenone (73 %).