Determination of Volatile Oil Constituents in Root and Shoot of Moringa peregrina (Forssk.) Fiori in Saline Soil

Background: moringa peregrina (forssk.) fiori. is a small tree, which grows in south east of iran. the shoot and root of m. peregrina contain volatile oil which has several isothiocyanates. objective: to study the effect of salinity on volatile constituents of root and shoot of m. peregrina.methods: the experiment was conducted on randomized complete blocks design (rcbd) with 8 treatments and 3 replications. the treatments were consist of control, 2, 4, 6, 8, 10, 12 and 14 ds/m. the volatile constituents were determined by gc and gc/ms. results: the results showed that the main constituent of volatile oil in control treatment was 1,2–benzendicarboxylic acid, bis (2-methyl propyl) (29.02%) which decreased with increasing salinity. in salinity treatments, the isothiocyanates compounds such as isobutylisothiocyanate and 2-isothiocyanatepropan were increased. in control level of salinity, the main compound of root volatile oil was thiocyanic acid phenylmethyl ester (29.6%) but was not found in the salinity treatment. the content of isothiocyanates in the shoot increased with increasing salinity up to 4ds/m. conclusion: the level of salinity had significant effect on volatile oil content and component of m. peregrina.