Oxidizing and antioxidant processes in wheat plants infected by Septoria tritici Rob

Purpose. Based on the study of oxidative and antioxidant processes in wheat plants (Triticum aestivum L.) in the earing phase at the infection by Septoria tritici Rob., identify the varietal features of changes in the level of hydrogen peroxide, the intensity of lipid peroxidation and the activi­ty of antioxidant enzymes for development of biochemical methods for selection of disease-resistant plants.

Methods. Field, spectrophotometric methods of biochemical characteristic determination, comparison, generalization. Statistical analysis of research results was carried out using the program Libre Office Calc (GNU Lesser General Public Licensev3).

Results. Changes in the content of hydrogen peroxide, malondialdehyde and the activity of catalase, superoxide dismutase, peroxidase in wheat plants infected by S. tritici at the earing phase were determined. The presence of varietal features of changes in the oxidative and antioxidant processes of wheat plant cells upon S. tritici infection were detected. It was shown that plant response to S. tritici damage in more disease-resistant wheat varieties were characterized by increased or unchanged relative to the control the content of malondialdehyde and peroxidase activity. 

Conclusions. The obtained results will expand the knowledge about the mechanisms of maintaining ROS homeostasis in wheat plants infected by S. tritici and allow to identify biochemical reactions of wheat plants in response to infection, which can be used in the future for the development of biochemical methods for identification of disease-resistant varieties.