Chromium is a heavy metal and is known to be harmful for human health .Toxicity effects of chromium on growth and development of plants including inhibition of germination process, decrease of growth and biomass of plant. The aim of this research is to study accumulation and distribution of Cr +3 in onion plant (Allium cepa cv. Hybrid). Onion seedlings grown in pots including soil and sand with raito 1:1 undergoing ,different treatments of Cr +3 (0, 5,10, 20, 40, 50, 100, 150, 200 mg/L). after 4 week seedlings were removed and accumulation of Cr +3 in roots and shoots were determined. Results showed that Cr 3+ addition in the soil caused enhancement of chromium content in roots and shoots of plant seedlings. It was also noted that accumulation of chromium in the roots were much higher than the shoots of the seedlings under treatment. +3 treatment, heavy metal

کلمات کلیدی