The investigation of essential oil composition in Nepeta cephalotes Boiss. and Nepeta gloeocephala Rech.f. in dry and wet conditions

Subject Areas : Phytochemistry

Merdokht Najafpour Navaei, ¹ , mehdi mirza ²

1 - Assistant Professor, Research Institute for Forest and Rangelands, Agricultural Research and Education Organization, Tehran, Iran
2 - Professor, Research Institute for Forest and Rangelands, Agricultural Research and Education Organization, Tehran, Iran

Received: 2017-07-04 Accepted : 2017-10-04 Published : 2017-11-22

Keywords: 1, Essential oil, Nepeta cephalotes, Nepeta gloeocephala, 8-cineol, Nepetalacton,

Abstract :

Nepeta cephalotes Boiss. and Nepeta gloeocephala Rech.f. are the exclusive species ,which are distributed in Irano-Turani region from Iran. The purpose of this study was identifying the comparision of essential oil composition from these two species in fresh and dry conditions. The aerial parts of N. gloeocephala in blooming were gathered from kashsn habitat in Ghamsar and Ghohrood (1700 m) and N.cephalotes were collected from Damavand by the river (1500 m) in May and June 2015, respectively. The essential oils were obtained in fresh and dried conditions by hydro distillation (Clevenger apparatus) and were analyzed by (GC) and (GC-MS). The results were showed that the yield of essential oils of both species in dry condition was higher than fresh condition. In Nepeta gloeocephala 29 compounds were identified, which that the 1,8-cineoles (28.9%, 36.5%)  had the highest percentage in wet and dry condition, respectively, but in Nepeta cephaloutes 17 compounds were identified, which that 4aα, 7α, 7aα neptata-lactone (wet 43%, dry 64%) were the highest amount in dry condition.Nepeta cephalotes Boiss. and Nepeta gloeocephala Rech.f. are the exclusive species ,which are distributed in Irano-Turani region from Iran. The purpose of this study was identifying the comparision of essential oil composition from these two species in fresh and dry conditions. The aerial parts of N. gloeocephala in blooming were gathered from kashsn habitat in Ghamsar and Ghohrood (1700 m) and N.cephalotes were collected from Damavand by the river (1500 m) in May and June 2015, respectively. The essential oils were obtained in fresh and dried conditions by hydro distillation (Clevenger apparatus) and were analyzed by (GC) and (GC-MS). The results were showed that the yield of essential oils of both species in dry condition was higher than fresh condition. In Nepeta gloeocephala 29 compounds were identified, which that the 1,8-cineoles (28.9%, 36.5%)  had the highest percentage in wet and dry condition, respectively, but in Nepeta cephaloutes 17 compounds were identified, which that 4aα, 7α, 7aα neptata-lactone (wet 43%, dry 64%) were the highest amount in dry condition.

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