ІRSTІ 34.29, 34.31.31, 87.15.03                                                           №4 (2019г.)

Uteulin K.R., Agapov O.A., Fedorina O.A., Atagaev A.b., Ahtaeva N.Z.

We have researched anatomical structure of cereal seedlings grown at soil samples contaminated by unsymmetrical dimethyl hydrazine (UDMH). It
was demonstrated that at soil samples, contaminated by (UDH): 5 mg/kg and 25 mg/kg nonresistant to UDMH, were used to cultivate cereal Tríticum aestivum, variety Saratovskaya-29 had depleted thickness of rizodermis and primary cortex of seedling roots, on the contrary resistant to UDMH wild-growing type of cereal Agropyron pectiniforme had increased thickness of rizodermis and primary cortex of seedling roots/ In view of this, defense reaction of cereal seedlings to stress factor, the soil contaminant UDMH, includes changes in anatomical structure of the root. The resistance seedlings of wild-growing type of cereal Agropyron pectiniforme to soil contaminant UDMH is ensured by increasing thickness of the plant
root tissues: rizodermis and primary cortex. Changes in quantitative-anatomical parameters of rizodermis, primary cortex, root central tube, leaf epidermis of highly sensitive and nonresistant to (UDH) cultivated cereal Tríticum aestivum, variety Saratovskaya-2 can be served as biological indicators of soil samples contamination by UDMH.
Keywords: Unsymmetrical dimethyl hydrazine (UDH), anatomy, seedlings, Tríticum aestivum, variety Saratovskaya-29, Agropyron pectiniforme