Growth and Nutrient Uptake of Paddy (Oryza sativa L.) under Chromium(VI) Treatment

摘要

Chromium is a heavy metal, and considered as an environmental hazard. Toxicity effects of chromium on growth and development of plants including inhibition of germination process, and decrease of growth and biomass of plant. The aim of this research is to study accumulation of chromium along with nutrients and its effect on the growth of paddy plant (Oryza sativa L.). Thus, paddy seedlings grown in petriplates lined with filter paper undergoing, different treatments of Cr (0, 2.5, 5, 10, 25, 50, 75, 100 and 200 mg/L). After one week seedlings were removed and morpho physiological parameters like root length, shoot length and dry weight of plants and accumulation of nutrients along with Cr in roots and shoots were determined. The results indicated that the concentrations more than 100 mg/L chromium cause the reduction of morphophysiology parameters in the treatment plants rather than control plant and Cr addition in the cultures caused enhancement of chromium content in roots and shoots of plant seedlings. Similarly nutrient accumulation was also affected by increasing concentrations of chromium. It was also noted that accumulation of chromium in the roots was much higher than the shoots of the seedlings under treatment.