Drought is one of the most important factors of limiting plant growth around the world and is the most common environmental stress. Coriander (Coriandrum sativum L.) is a culinary and medicinal plant from the Umbelliferae family. In order to investigation of selenium foliar application on enhancing drought tolerance of coriander an experimental was carried out in a factorial experiment based on RCB design with three replication during 2012-2013. Drought stress was in four levels: 100% of field capacity (FC) as control, 80% FC, 60% FC and 40% FC and selenium was in shape of sealant sodium substance in four concentration: without using selenium as control, 20 mg/l, 25 mg/l and 30 mg/l. Measured traits were morphologic traits such as number of sub shrub, number of subshrubs with flower, plant height and root height. Results showed that simple effect of irrigation was significant in all of the traits (p<0.01). Simple effect of selenium had significant effect on all of the traits (in 1% level) too. Interaction effect of irrigation and selenium spraying had significant effect at 0.01 level of probability on all of the traits. The highest number of sub shrub obtained in control of both treatments that was 19.33 number and the lowest amount was 5.18 that obtained from 40% FC and 25 mg/l selenium. The highest amount of RWC obtained from control of both treatments (90.33 percentage) and the lowest amount was observed in 40% FC and 30 mg/l Se (42.66). پرونده مقاله