Investigate the effect of drought and salinity on germination of native wheat cultivars in Ardabil

Considering that salinity and drought stress are the most important environmental stresses. In this study, the physiological effects of these stresses were studied in levels 0, -3, -6 and -9 bar with sodium chloride (NaCl) and polyethylene glycol (PEG) on germination and seedling growth of wheat cultivars (Cross Sabalan and Gascogne). Germination percent, germination rate, length ratio of root to shoot (R / S) and seedling fresh weight measured in this experiment. The aim of this study was to investigate genetic differences in wheat varieties under salinity and drought stress and also determining the sensitivity of the germination components and its seedling growth. Results indicated that there was significant difference between wheat different genotypes in terms of the sensitivity to salinity and drought stress, wheat germination was not affected by drought, but the germination percent of Cross Sabalan and Gascogne decreased respectively to 69 and 33 percent under salinity stress. The maximum germination rate was observed on the wheat’s Gascogne seeds under stress. Drought stress had a significant effect on the ratio R / S, but there was no significant effect of salinity on this character. The greatest increase was devoted to "Cross Sabalan" in the drought conditions. Gascogne had the highest seedling fresh weight in different levels of salinity and drought.