Effect of Plant Growth Regulators on Protease Activity in Forest Floor of Norway Spruce Stand

Soil proteases are involved in organic matter transformation processes and, thus, influence ecosystem nutrient turnovers. Phytohormones, similarly to proteases, synthesized and secreted into soil by fungi microorganisms, regulate plant rhizosphere activity. The aim of this study was determine the effect auxins, cytokinins, ethephon, chlorocholine chloride on spruce forest floor protease It concluded that presence auxins stimulated native proteolytic activity, specifically synthetic auxin 2-naphthoxyacetic acid (16% increase at added quantity 5 μg) naturally occurring indole-3-acetic (18%, μg). On contrary, ethephon inhibited where (36% decrease 50 (34%, 100 showed highest inhibitory effects. negative phytohormonal effects activity may slow down decomposition rates hence complicate nutrition. enhances understanding exudate microbial nitrogen cycle.