Determination of Resistance Cumhuriyet-75 and Selimiye-95 Wheat (Triticum Aestivum L.) Varieties Against to Some Abiotic Stress Factories

Abstract

In this study, resistance mechanism of two wheat genotypes against salt, heavy metal,lime and drought (50%) treatments were investigated in summer Cumhuriyet-75 andwinter Selimiye-95. According to results chlorophyll a, b, total chlorophyll andcarotenoid level increased in FeCl3, drought and 225 mM NaCl in Cumhuriyet-75 butthey were higher at NaCl, FeCl3 and ZnCl2 treatments in Selimiye-95 comparison tocontrol. While H2O2 content rose all stres treatments in both varieties butMalondialdehyde (MDA) decreased in Selimiye with all applications. The amount ofproline is lower in Cumhuiyet-75 but higher in Selimiye-95. Total soluble protein wasfound higher at salt concentartion and drought in both varieties. Ascorbate peroxidase(APX), Süperoxide dismutase (SOD) activity increased in salt and FeCl3 in Selimiye-95but SOD ativity were higher at salt treatments in Cumhuriyet-75. And also in bothvarieties APX and Guaiacol peroxidase (GuPX) increased at FeCl3 but Catalase (CAT)were higher in only FeCl3 in Cumhuriyet-75. As a result Selimiye-95 showed tolerance tosalt and FeCl3 with high photosynthetic pigment, proline and soluble protein content withlower MDA but it is sensitive to NiCl2 and drought. Whereas Cumhuriyet-75 cultivar isresistan to drought, FeCl3 and 225 mM NaCl depended on pigment, protein content andAPX, CAT, GuPX and SOD activities. When all the data are taken into consideration, itwas concluded that the responses of the varieties to the treatments changed according tothe type and concentration of stress, and Selimiye-95 variety was tolerant compared toCumhuriyet-75 variet