Study the effects of Se and Cd on some parameters morphological and physiological in cultivars of wheat plant

Cadmium as an environmental pollutant heavy metals have effect on morphological and physiological activities in plants. Selenium, an essential element had beneficial effects on enhanced tolerance in plants against environmental stresses. In the investigation, from Cadmium chloride concentrations 0, 350, 700 µM supplied with added to soil and Sodium selenat 0, 1.5, 3 mg L-1 as a foliar application in two wheat cultivar (Kavir, Roshan) has been used. The test was done in December of 2014 in green house of biology department of Shahid bahonar university of Kerman. The tests were carried on in the form of completely randomed design with three replications in each treatment in two developmental stages, vegetative growth stage or stem elongation and flowering stage. Results showed that cadmium stress decreased content of photosynthetic pigment and increased indicator of EC and too decreased fresh and dry weight of shoots, stem and shoots length, spike length, spike weight, number and weight of seed. Treatments of selenium in 3 mg L-1 concentration decreased indicator of EC and increased content of chlorophyll a amount 35 percent in Kavir cultivar and content of chlorophyll a in Roshan cultivar amount 17 per in comparison with control and too this concentration of Se, promoted all parameters in spike in stress and non stress conditions. Results of weighting elements of Se and Cd, showed that under concentration of 700 µM Cd and concentration of 3 mg L-1 Se, Kavir cultivar in comparison with Roshan cultivar have been could accumulated of Se amount 42 percent inter of seed. Our results it could be concluded that the application of Selenium caused significant alleviation of Cadmium damaged to wheat plants.