The study of salt tolerance and physiological characteristics in Atriplex verrucifera ecotypes

In this research salt tolerance and physiological characteristics of Atriplex verrucifera ecotypes in Tabriz, Qazvin and Arak rangelands were investigated. This species due to bushy form, salt resistant, proper proteine percent, is one of the native plants and valuable in saline rangelands. These characteristics caused extensive use of this plant in rangelands reformation programs. The aim of this research paying attention to physiological parameters changes of salt resistant species ecotypes. Samples (soil and plant) of Atriplex verrucifera ecotypes were collected from Tabriz, Arak and Qazvin region and were analyzed. The experimental design was completely randomized design with 4 replications and 3 treatments (Tabriz, Arak and Qzvin). The studied parameters consisted of: water content relation, water potential, glycinebetaine,, proline, soluble sugars, starch, sodium, chlor, potassium, manganese, calcium, pH, Ec and soil texture. Results showed that rate of changes related water content, water potential, glycinebetaine, proline, soluble sugars, starch and ion accumulation in ecotypes were significant. Also in this research it was noted that salt resistant parameters in ecotypes dependent to climatic condition, soil chemical and physical characteristics. Results showed that Tabriz ecotype salt resistant parameters increased compared to others ecotypes.