Effect of N-phenyl-2-naphthylamine on activity of adenylate cyclase signal system components and virulence of bacterial phytopathogens and mutualists

Resumo

The effect of N-phenyl-2-naphthylamine, negative allelochemical isolated from the exudates of roots of pea (Pisum sativum L.), on the growth and activity of the adenylate cyclase signal system and virulence factors of the bacteria Rhizobium leguminosarum bv. viciae and Pseudomonas siringae pv. pisi was studied. It was demonstrated that N-phenyl-2-naphthylamine at a physiological concentration nonspecifically inhibited the growth of these bacteria in both planktonic cultures and biofilms. One of the reasons for this phenomenon is the reduction of intra- and extracellular concentrations of cAMP due to greater activation of phosphodiesterase, which disrupts cAMP, in comparison to soluble adenylyl cyclase, which synthesizes it. At the same time, N-phenyl-2-naphthylamine did not affect activity of either membrane-bound adenylyl cyclase or bacterial virulence factors.