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Oxidative stress is one of the serious biochemical consequences of environmental stresses, particularly salinity. The present study was conducted to evaluate biochemical, antioxidative enzymes and the corresponding gene expression responses of four contrastive chickpea genotypes to 100 mM NaCl stress during 12 days. The salinity stress imposed significant increases (p ≤ 0.05) compatible osmolytes, that is, proline and soluble carbohydrate, especially in the most tolerant genotype (T1) by 14.87 µmol g⁻¹ DW and 204 mg g⁻¹ DW after 12 days of stress, respectively, to assist in osmotic adjustment and maintain cell membrane integrity to preserve cell turgor. Similarly, 7 days of salinity incurred differential increases in enzymatic activities of T1 and the most sensitive genotype (S2) by 66 and 20% for SOD, 138 and 15% for CAT, 179 and 77% for APX, and 172 and 136% for GR over the relative controls …