Efectul preparatului Tiogalmet asupra activității sistemului enzimatic de protecție antioxidantă a plantelor în condiții de stres oxidativ

Abstract

The effect of Thiourea, Galmet and Thiogalmet on the activity of enzymatic system of antioxidant protection of plants exposed to moderate drought conditions was studied. Thiogalmet is a new chemical composition that contains thiourea and gallates of potassium, ammonium, magnesium, potassium molybdate and ammonium paramolybdate. As subjects of investigations served the plants Glycine max (Merr) L variety Nadejdaand Zeya mays L cultivar P480, grown in the Mitcherlih vegetation pots with volume of 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), ascorbate peroxidase (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 newest chemicals with stronger antioxidant properties compared to Thiourea and Galmet, and can be used to reduce the negative impact of oxidative stress caused by reactive oxygen species (ROS).