در چند رقم گندم ايراني PH ارزيابي مقاومت به شوري ، خشكي ، سرما، گرما و تغييرات

Evaluation of resistance for salinity, drought, cold , heat and pH changes in four Iranian wheat cultivars

In this study the effects of salinity, drought, cold, heat and pH on germination of four Iranian wheat cultivars including: Sardary, Sabalan, Alamout and Zarrin were investigated in petridishes using randomized complete block design with three replications. The results revealed that in 5 C° Alamout with 100% germination was the most resistant and Zarrin with 58% germination was the most sensetive cultivar to chilling stress. In-3..22 Mpa Sardary with 75% germination was the most resistant and Zarrin by 0% germination was sensitive cultivar to drought stress. In 10g/lit or 0.171 M concentration of NaCl Sabalan with 60% germination was the most resistant and Sardary by 40% germination was sensitive to salinity. Germination of wheat cultivars in different levels of pH showed that optimum pH for germination of wheat was between 5-90. Sardary was appropriate cultivar for acidic soils and Zarrin was sensitive to acidic soils, wheras Alamout showed sensivity to alkaline soils. The study of some chemical compounds in seeds of wheat cultivars showed significant relationship between protein content of seeds and their resistance to drought, cold and heat stress. So, resistant cultivars in comparison with sensitive ones contained higher protein and lower starch percentages.