الفهرس 
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Abstract
Generally Sakha8 wheat variety could afford salinity better than wheat cultivar Giza9, Sorghum and Lolium plants. In the present study, salt stress caused a significant decrease in shoot, root growth parameters as well as seed germination percentage of wheat cultivar Sakha8, Sorghum and Lolium plants. In case of cell membrane stability, increasing in salinity stress showed increasing in cell membrane stability.from leaf and root anatomy of wheat cultivar Sakha8, wheat plant treated with 0. 5% NaCl showed a decrease in leaf and root parameters. Ultrastructure measurements by transmission electron microscopy of Sakha8 wheat cultivar grown under salt stress (0.5% NaCl) showed a general decrease in leaves and root parameters. The analysis of protein banding patterns from leaves of three plants wheat cultivar Sakha8, Sorghum and Lolium treated with different NaCl concentrations showed either remained unchanged, accelerated or supressed in results in comparing with control.The impact of salinity on the genetic constitution of the three plants wheat cultivar Sakha8, Sorghum and Lolium were detected. from RAPD-PCR, using 6 RAPD-primers; DNA fingerprint in each treatment showed variable responses to salt stress when compare with control. Root tips of the two wheat cultivars Sakha8 and Giza9 plants under NaCl stress causes reduction in mitotic index (MI) and phase index (PI). The percentage of abnormal mitotic phases recorded increase under salt stress in all treatments.