Zinc solubilizing plant growth promoting microbes produce zinc

Abstract

At ICAR-CRIDA in Hyderabad, India, strains of Pseudomonas, Bacillus, and Azospirillum that were capable of supporting plant development were tested for their capacity to solubilise zinc. The capacity of effective zinc solubilising microbes to generate nanoscale zinc particles was assessed. Particle size, Zeta potential, and functional groups were measured in the nanoparticles derived from the cell-free culture filtrates of these strains. Particle distribution and scanning electron microscopy (SEM) examination verified the presence of Zn nanoparticles in the bacterial culture filtrate. The majority of nanoparticles' characteristics rely on their size. Zinc nanoparticles with sizes ranging from 52.0 to 106.0 nm were found to be spherical in form. To determine the stability of the particles, the zeta potential of the Zn nanoparticles was calculated. The zinc nanoparticles' great stability and dispersion were shown by the observed zeta potentials, which ranged from –14.5 mV to +179.10 mV. The function of protein functional groups in the production of zinc nanoparticles was shown by FTIR peaks at various wave numbers. These findings show that microorganisms of Azospirillum, Pseudomonas, and Bacillus that promote plant development and solubilise zinc may produce zinc nanoparticles in an environmentally friendly manner.