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Abstract
Mentha mozaffarianii is an endemic mint species from Iran. In this research essential oil composition from fresh and dry samples of two ecotypes of this species from Iran were studied. The results showed, essential oil yields of M. mozaffarianii in dry samples were 1.98 % and 2.28 % (v/w) in ecotypes (ECTPs) A and B respectively, while essential oil content in fresh samples were 2.88 % and 2.43 % (v/w) respectively. The main constituents of essential oil of ECTP A on dry and fresh samples respectively were piperitone (12 and 27 %), piperitenone (22.4 and 9.9 %), piperitenone oxide (15.4 and 11.4 %), trans-piperitone epoxide (5.2 and 15.6 %) and pulegone (9.2 and 3.4 %). Whereas the major oil components of dry and fresh sample of ECTP B were menthone (21.7 and 48.5 %), pulegone (38.8 and 22.5 %) 1,8-cineole (7.5 and 5.1 %) and borneol (6 and 4.3 %) respectively. The results showed that piperitenone and pulegone in both ECTPs were as major compounds. Also identified major constituents strongly affected by ecotype and drying treatment.