Abstract :
A greenhouse experiment was conducted in 2013 in Research Lab of Karaj Islamic
Azad University to determine the yield and activity of chemical markers as the response to different concentrations of Cadmium (Cd) (0, 5, 10 and 20 mg of Cd/kg of
soil) in wheat cultivars (Karaj 1 and Karaj 2). Treatments were tested in a factorial
experiment with four replications in 7.5 kg plastic pots. The response of seed yield
and other parameters to Cd was negative, but the rate of Di-Tyrosine (Di-Ty) was increased. In comparison of cultivars, Karaj 1 had higher production and lower rates of
Di-Ty at high concentrations of Cd than Karaj 2. There was a significant increase of
Di-Ty in the leaf tissue due to Cd increase. The effects of Cd were high on measured
characters in control treatments. This reaction was due to increase of Di-Ty by heavy
metals in cultivars. Finally cultivars need to have high tolerance to Cd for optimum
production of seed yield in this study at high concentrations of cadmium, but high
yield in Karaj 1 was related to low rates of Di-Ty.
