The effect of NaCl on seedlings of (Triticum aestivumL.) var. Sakha 69 was studied. Obtained results revealed that high salinity treatment (12 dS/m) caused symptoms of oxidative damage such as a decrease in growth rate, superoxide dismutase activity, nitrogen content, protein percentage. On the other hand high salinization led to increase in peroxidase activity, lipid peroxidation, sodium and chloride ions accumulation as well as Na : K ratio.   Additional index words : Triticum aestivum L. - salt stress – oxidative stress - antioxidant – enzymes - nitrogen – sodium  chloride - potassium and protein.   Abbreviations: SOD:superoxide dismutase MDA=malondialdehyde. RGR : relative growth rate