Evalution of the effects of salinity conditions on original plants on seeds, vigor

Salinity is one of the main problem in cereal production. For assessing the effect of salinity on seedling of the plants that had been grown in salinity conditions, an experiment with four tolerant wheat cultivars in four treatments(0, 60, 120 and 180 Mm NaCl) was conducted. The seeds of these plants were tested with distilled water using a factorial arrangement in a completely randomized design with 3 replications, and the percentage of germination, vigor, root and shoot length, root and shoot weight were measured. Analysis of variance indicated that there were significant differences between cultivars on root length, R:Sh, root and shoot weight and the biomass but these elements were not affected equally. Root length, root and shoot weight and biomass of cultivars in salinity treatments increased because of the absorption of water that is the result of reduction of osmotic potentiality of seeds. Shoot length and percentage of germination show the least amount of change among wheat species and different levels of salinity that represents the less sensitivity of these characteristics to salinity stress. However, these changes were not the same which shows the genetic difference among the cultivars.