Effect of ferric iron oxide nanoparticles on ascorbate peroxidase activity in durum and bread wheat seedlings

Abstract

Under stress conditions, the content of reactive oxygen species (ROS) in plant cells increases, therefore, the intensity of free-radical oxidative processes increases. In response to an increase in ROS, the components of the antioxidant system (AOS) of plant protection are activated. In this regard, the article considers the change in the activity of one of the high-molecular components of plant protection AOS - ascorbate peroxidase (APO) in two-week-old seedlings of durum and bread wheat varieties under the influence of ferric oxide nanoparticles (NPs). In the seedlings of the tested durum wheat varieties, NPs led either to a slight or sharp increase in the activity of the enzyme (Kyrmyzy bughda and Karagylchyg-2), respectively, or to a decrease (Yagut), or practically did not cause any changes (Karabagh) in the APO activity. In the case of bread wheat varieties, under the influence of NPs, an increase in the activity of the enzyme was observed in seedlings of varieties (Daghdash and Kobustan), while in seedlings of varieties (Sheki-1 and Mirbashir-128), a decrease in APO activity was observed. Thus, the obtained results can serve as the basis for the selection of wheat varieties in order to obtain varieties more resistant to abiotic stressors.