Increasing of Spring Wheat Plant Resistance to Copper Toxicity by Application of Plant Growth-Promoting Rhizobacteria on Metal-Contaminated Soil

Abstract

Effects of plant growth-promoting rhizobacteria of the Pseudomonas genus application on growth of spring wheat plants was studied in pot experiment on agrogrey soil artificially contaminated with Cu in increased concentration. Increasing of plants resistance to metal toxicity by application of bacteria was found. Chemical composition of plants and uptake of Cu and biophilic elements N, P, K, Ca, Mg, Fe, Zn and Mn by shoots and roots were determined. Positive effect of bacteria on plant growth in contamination of soil with Cu is due to increase in nutrient uptake by plants from soil, concentration and accumulation of metal in roots that indicates protective response reaction of plants to soil contamination with Cu. Bacteria increased Cu uptake by plant shoots from contaminated soil – enhanced phytoextraction without changes in soil medium reaction.