The evaluation of Germination and seed vigor parameters barley (Hordeum vulgare L.) under lead and cadmium pollution

In order to investigate the effect if lead and cadmium contamination on seed germination and seed vigor of Barley (Hordeum vulgare L.) yusof, a factorial experiment in randomized blocks design was conducted in triplicate. The factors included pbcl2 at three levela,[0, 60and 120 µmol/L] and cdcl2 at four levels[0, 30, 60 and 90 µmol/L].The results showed that simple effect of pbcl2 on final germination, cathalase and phosphatase was significant(at 1%). Simple effects of pbCl2 on wet stem weight, cathalase and phosphatase (at1%) and on root lenghth. and phosphatase (at 5%), wet and dry shoot weight were significant (at 1%), Comparison of interaction effects lead chloride, cadmium chloride showed that The maximum and lowest fresh weight of shoot is 1.029 g , 0.551g related to treatment without the use of lead chloride and cadmium chloride and with treatment of 120 micromoles per liter of lead chloride and 60 micromoles per liter of cadmium chloride respectively. The highest and lowest of dry weight 0.259 gr and 0.074g were non-use cadmium chloride and non-use of lead chloride and 120 micromoles per liter of lead chloride and 60 micromoles per liter of cadmium chloride treatments, respectively. The max and min root length were related to 10.58 mm and 2.45 mm amount of treatment without the use of lead chloride, cadmium chloride and lowest related to treatment with 120 micromoles per liter of lead chloride and 60 micromoles per liter is cadmium chloride. In acid phosphatase, the highest amount with 3.33 international units per gram fresh weight of tissue in the treatment of 60 micromoles per liter of cadmium chloride and lead chloride, and avoiding the use of cadmium chloride and lowest amount with 0.66 international units per gram of fresh weight related to the treatment of 120 micromoles of lead chloride per liter × is used at a rate of 90 micromoles cadmium chloride per liter. In general, decries of plant growth are due to high concentrations of heavy metals, chloride atmosphere of lead and cadmium chloride. In this study, the best treatment is avoiding the use of lead chloride, and avoiding the use of cadmium chloride.