Some morphometric Avena sativa parameters and content of proline in it at salinization on the background of acid and alkaline reaction in сespitose-podsolic soil

Some physiological and biochemical parameters were studied in the leaves of Avena sativa L. at salinization and different рН-levels of the soil environment. The negative influence of these factors on seed germination and morphometric parameters of oats is noted. Acid and alkaline pH levels of soil suppressed plant growth in height by 20% compared with the control and reduced leaf surface by 30%. At salinization against the background of different pH levels these indicators were reduced almost twice. The maximum mass of oat plants is fixed on an alkaline medium, both with salinity and without salinity. The increase in mass with a decrease in other growth indicators, most likely due to the accumulation of water. This, in turn, may be due to an increase in the number of osmolytes in the cells. The amount of salting Na+ and Cl- ions in the leaves of oats increases in all variants of the experiment with salinization of the soil. The maximum accumulation was recorded under the action of alkaline stress, which is probably due to changes in membrane permeability. The content of proline in the leaves of oats increases at salinization of the soil in all variants of pH levels. On the acidic and alkaline background, a decrease in the amount of proline in a relatively neutral environment is observed, both under and without salinity.