بررسی اثرات تنش خشکی ناشی از پلی اتیلن گلیکول بر خصوصیات مورفوفیزیولوژیک گیاه کنجد(Sesamum indicum)

In order to investigation effects of drought stress applied by PEG on morphophysiological Traits of Sesamum indicum, a factorial experiment was performed in a completely randomized design (CRD) with three repeats. In this research Tested in the laboratory of Agricultural Sciences and Natural Resources, University of Sari in fall and winter 1391 was performed. The seeds were germination in Yonolit 220 with a temperature of 2 ± 25 ° C, 16 h light and 8 hours of darkness were trained. After germination were transferred to Hoagland hydroponic conditions after seedling establishment, drought stress was applied at 28 days. different levels of drought stress, including zero (control), -1.5, -2, -2.5 and -3 (bar) applied using PEG 6000 were analyzed. ANOVA statistical analyzes results showed that there are significant relationships (P ≤ 0/01) among different PEG concentration and traits, including length, dry weight, prolin and soluble sugars contents in shoots and roots of the plants. comparison of means among treatments indicated that the value of prolin and soluble sugars content at tips of root and shoot increased with increasing drought stress that are an adaptive response to the stress. On other hand increased ratio of both prolin and soluble sugars content in high levels of drought stress concentrations.