Heavy metals are among the most important sources of contaminant in the environment. Therefore the main objective of this study were to evaluate the effects of HG levels (0, 75 and 150 mg.l.-1 in a saline soil on the growth parameters of the turnip. pots were filled with 3 kg of soil (ECe 8.65 dS.m-1), turnip (Brassica rapa L.) seeds were sown in all the pots, After 10 days, the soils were treated with either 0, 75 or 150 mg.l-1 of Hg until the final Hg concentration in soil. The pots were arranged in a completely randomized design in a greenhouse. After 10 days of planting, soluble sugars, carotenoid content, per-oxidase activities, chlorophylls a (chl a) and b (chl b) and catalase enzyme (CAT) in leaf samples were determined while dry weights of roots and shoots and Hg concentration in turnip were determined 70 days. The results showed that the maximum concentration of Hg in turnip occurred in roots followed by shoots. Soluble sugars in shoot were reduced significantly. chl a and chl b, carotenoid content and CAT and per-oxidase activities were significantly reduced with 75 and 150 mg.l-1 Hg treatments compared to control. But shoots and roots dry weights were decreased with increasing Hg levels compared to control.

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