Authors : Sadrollah Ramezani , Mehdi Rahmanian , Rohollah Jahanbin , Fatemeh Mohajeri , Mohammad Reza Rezaei and Behnaz Solaimani
Abstract: Iranian Coriander (Coriandrum sativum L.) is one of the most commonly collected from cultivated Coriander species in Iran. In this study, the diurnal variability of the essential oil content in Coriandrum sativum L. grown in the ecological conditions of Shiraz was studied during 2008. The seed of coriander were sown in April 2008 by hand in rows of 55 cm apart and spaced 35 cm distances between every plant in the row at the experimental farm of Shiraz University in a complete plot design with 3 replications. Shoots in green fruit stage of life cycle of this species including green fruit and leaves were collected 4 times a day (at 6, 12, 18 and 24 o’clock). The content of the essential oil were obtained in the aerial parts samples by using an all glass Clevenger-type apparatus, for 3 h. The results of this experiment indicated that essential oil content changed according to the hour of day and night. Essential oils in 12 h was more than other hours so that yields of essential oil (w w-1%) at different times were in the order of 6 (0.432%), 12 (0.436%), 18 (0.404%) and 24 (0.319%) treatments. The significant differences were obtained between these hours in 1% level. According to these results, we conclude that for obtaining of more yields of essential oil and other volatile compounds, harvesting of matter plants must be accomplished at special hour in one day.
Sadrollah Ramezani , Mehdi Rahmanian , Rohollah Jahanbin , Fatemeh Mohajeri , Mohammad Reza Rezaei and Behnaz Solaimani , 2009. Diurnal Changes in Essential Oil Content of Coriander (Coriandrum sativum L.) Aerial Parts from Iran. Research Journal of Biological Sciences, 4: 277-281.