Cd and Co accumulation by barley plants and modifying effects of biologically active substances

摘要

The influence of Cd and Co on plant growth and the modifying effects of biologically active substances (Zircon, Epin) used for a presowing treatment of seeds have been studied. Co has been found to produce more negative effects on the productivity formation in spring barley than Cd, though the exceeding of metal contents in soil over the MPL (Maximum Permissible Level) were quite close (20 and 25MPL, respectively). Parameters of metal accumulation by barley in ontogenesis have been determined. Co accumulation, particularly in vegetative tissues, was noticeably lower than that of Cd. Seed incrustation with Zircon and Epin did not produce significant influence on the Co and Cd phytotoxicity. The use of the biologically active substances resulted in different effects on Co and Cd accumulation in barley plants at various stages of its development. A possibility of predicting Cd accumulation in yield and mechanisms of metal detoxication in plants was discussed.