The effect of co-activation of the stress-memory formation potential under repeated drought of Glycine max (Merr.) L. plants was recorded using cytokinin (CK), thiourea (TH) and, especially, complex preparation Polyel. Glycine max plants (Merr.) L. of Moldovitsa, Nadejda and Magia varieties, exposed to two cycles of "drought–rehydration" at the "first trifoliate leaf" and "flowering - pods formation” phases served as test subjects. The tolerance-inducing effect manifests itself by maintaining the content of assimilatory pigments, photosynthesis and growth processes at a significantly higher level. After the restoration of the optimal moisture background, plants pre-treated with CK, TH and the preparation Polyel, which endured moderate stress in the initial stages of ontogenesis, had restored functional processes. The information obtained in this work certainly opens the management perspective of the ability to form stress memory, adaptation and tolerance of plants to the unfavourable fluctuation of humidity and recurrent drought. The management possibilities of plant adaptation and tolerance are discussed.

Abstract:The effect of some selenium-containing compounds on the antioxidant properties of Allium sativum L. plants is shown in the present work. Pre-treatment of bulbs before planting and foliar treatment during plant growth with gibberellin solution (125 mg · L -1 ); potassium selenate (36 μg Se·L -1 ) and a new cobalt(III) coordinative compound (33 μg Se·L -1 ) resulted in the increase of the concentration of proline and assimilating pigments, reduced peroxide oxidation of lipids, enhanced antioxidant cell protection. The greatest effect was observed in plants pre-treated with the new coordinative compound, "Fludisec", manifested by an increase of antioxidant properties of leaves and bulbs, optimization of growth process and productivity. X-ray analysis of monocrystal demonstrated that Fludisec is a coordination compound of ionic type

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The effect of Thiourea, Galmet and Thiogalmet on the antioxidant protection capacity of plants in moderate drought conditions was studied. Thiogalmet is a new chemical composition that contains Thiourea (Tu) and Galmet - a preparation that consists of a mixture of potassium, ammonium, magnesium gallates, and potassium molybdate and ammonium paramolybdate. Biological tests were performed in the vegetation complex of the Institute of Genetics, Physiology and Plant Protection. As subjects of investigations served the plants Glycine max (Merr) L Nadejda variety and Zeya mays LP458 cultivar, grown in the Mitcherlih vegetation pots with 40 kg soil and exposed to the drought stress at the critical stages for water. It has been established that pre-treatment of plants with Thiourea, Galmet and, in particular, with Thiogalmet increases the activity of superoxide dismutase (SOD), catalase (CAT), ascorbateperoxidase (APX), glutathione reductase (GLR) and glutathione peroxidase (GLPX). The high activity of antioxidant enzymes is associated with a decrease in the content of malonic di-aldehyde (MDA). The increase in antioxidant protection capacity of plants pre-treated with Thiogalmet was recorded both in optimal conditions and in conditions of oxidative stress induced by drought. Thiogalmet has been shown to be one of the new biologically active chemicals that can be used in agriculture to reduce the negative impact of oxidative stress caused by reactive oxygen species (ROS).