The article presents the results of the analysis of amino acid composition of grain of spring soft and durum wheat varieties by the amount of proline and essential amino acids under conditions of favorable and dry years in terms of weather factors. An increase in the amount of proline was established under conditions of temperature stress and a lack of moisture in soil, it allows us to consider this fact as an index of resistance to unfavorable environmental factors. The amount of essential amino acids depended on weather and technological factors. The content of the amino acid proline in spring wheat grain should be considered as a signaling function for stressful vegetation conditions. The content of essential amino acids in spring wheat grain increases in favorable years and against the background of moldboard plowing.

The results of field experiments on the influence of different options of ultrafine metal particles, their oxides, their combinations, and biostimulants on the antioxidant activity of SOD, the content of malonovodialdehyde, and the amount of photosynthetic pigments in arid conditions are presented. The positive effect of the studied options of ultrafine metal particles and their oxides on the content of both types of chlorophyll is noted. There are phase of exit into the tube and the reduction of the type of chlorophyll b in the variants of the UFP of iron and silicon oxide and their combination. In the earing phase, an increase in the proportion of chlorophyll a over chlorophyll b was observed in most variants of the experiment. The amount of SOD enzyme under the action of metals UFP and their oxides increased, a positive effect among the biostimulant options was obtained by Agroverm and Siliplant. Biofertilizer Blago3 contributed to the reduction of the amount of malonovodialdehyde.