Effect of premixing of spermidine and polyethylene glycol on germination and physiological and morphological activity in Triticum durum wheat with Salinity stress

Abstract

In order to effect of spermidine and polyethylene glycol pretreatment on germination and some physiological and morphological activity durum wheat under salinity stress a experiment with 20 treatments, three replications was conducted in 60 experimental units. Treatments included five levels of spermidine (0/ 02,0/ 05,0/ 1 and 0/15 mM) and four levels of polyethylene glycol (0- 2,- 4 and -5 bar). The results showed that the use of spermidine increased the relative weight contact of leaf (RWC), leaf area ratio, chlorophyll s and phenolic compounds . In this study, carotenoids content and leaf antioxidant activity decreased with increasing spermidine level and also had no statistically significant effect on germination. With increase of polyetylen glycol antioxidant activity, carbohydrates and total phenolics increased but decreased germination. Therefore, according to the above results, application of spermidine and polyethylene glycol as seed pre-treatments can have significant effects on physiological and morphological activities in stress conditions and increase plant potency under stress conditions.

Keywords

• drought stress
• polyethylene glycol
• physiological factors
• spermidine
• triticum durum