Influence of “Immunact-GK” and “Ecosil” preparations on the photosynthetic apparatus and oxidative status of tomato plants in conditions of small volume hydroponics

Abstract

It was shown that the preparation “Immunact-GK” based on β-1,3-glucan exerts a multilateral positive effect on tomato plants grown under conditions of low-volume hydroponics in protected ground. In particular, it has a stimulating effect on the biosynthesis of photosynthetic pigments and the photochemical activity of PS II in chloroplast membranes, induces the accumulation of phenolic compounds, promotes the generation of ROS, which perform a signaling function and start a natural internal defense mechanisms, contributes to stabilize the level of oxidative processes in tomato leaves. It has been established that under manufacturing conditions, the preparation “Immunact-GK” provides an increase in tomato yield up to 5 kg/m 2 and exceeds the efficiency of the native growth regulator “Ecosil”.