Effect of Foliar Treatment with Aqueous Dispersions of Silver Nanoparticles on Legume-Rhizobium Symbiosis and Yield of Soybean (Glycine max L. Merr.)

Interest in the use of silver as a component plant protection products and growth regulators appeared relatively recently with development methods for effective stabilization colloidal systems containing nanoparticles this metal. In present work, we studied effect foliar treatments aqueous dispersions stabilized by polyhexamethylene biguanide hydrochloride an average diameter 6 ± 1 nm zeta-potential +47.4 1.3 mV on legume-Rhizobium symbiosis, which largely determines efficiency soil nitrogen assimilation yield soybean (Glycine max L. Merr.). Based results two-year field experiment, it was shown that low doses lead to significant increase number root nodules yield. The observed biological effectiveness is explained enzymatic activity peroxidases polyphenol oxidases terrestrial part plants. It very likely treatment peroxidase non-infected parts more prevention penetration rhizobacteria into aboveground organs, which, turn, may be reason decrease oxidase roots susceptible rhizobia. latter, known, contributes easier flow nodulation process legume–Rhizobium symbiosis.