investigation the salinity tension effect on growth and physiological characteristics of nine wheat cultivars at vegetative growth stage

this research was carried on in order to investigate the response of wheat cultivars to salinity tension as factorial experiment and in complete randomized block design in four replications in islamic azad university shoushtar branch. in this experiment the response of nine wheat cultivars including chamran, karchia66, mahoti, roshan, alvand, kavir, ghods, atrak and tjan at vegetative growth stage in three salinity levels of water irrigation zero (control), 6 and 12 ds m-1 was investigated. results showed salinity tension decreased seedling dry weight, chlorophyll concentration, leaf k+ concentration and leaf k+/na+ ratio of wheat cultivars. while, malondealdehid concentration, leaf na+ concentration and leaf solution carbohydrates concentration increased under effect of salinity tension. the highest salinity tension tolerance index was observed in mahoti and karchia 66 cultivars (0.0089 and 0.0087, respectively). while, ghods cultivar allocated the minimum amount of this index (0.0028). karchia 66 and mahoti cultivars had the highest seedling dry weight at 12 ds m-1 salinity level in comparison with other cultivars.