The Effects of Lead And Cadmium On the Some Growth Parameters of Bread Wheat (Triticum aestivum . cv. Sagittario)

Introduction Heavy metal pollution is one of the most .important stress factors that limit plant growth and survival. Also, these metals accumulate in plant tissues, increase their toxicity and join the food chain. Industrial activities, agricultural chemical and urban wastes are the main sources of heavy metal pollution. Plants have different responses to heavy metals according to its type, concentration and duration of exposure. Wheat is a basic crop mostly grown in a lot of countries.. Material and Methods In the present experiment, the effects of two metal (cadmium and lead) on bread wheat (Triticum aestivum L. cv. Sagittario) was investigated. So, seeds were germinated in Petri dishes in controlled climate room and watered with 0 (as control) -100 and 200 µm lead (as PbNO3) and cadmium (as CdCl2) for four days (each application had four replicates), harvested and growth parameters were evaluated with LSD test. Findings Both cadmium and lead affected negatively growth parameters. Root and shoot lengths, fresh and dry weights decreased by increasing lead and cadmium concentrations. As compared with control groups, the change of lengths and root dry weight were found significant statistically (according to LSD test) in all applications. Results and Discussion It is determined that the most toxic effect was found at the highest dose of lead (200 µm) to Sagittario cv that we used in this study