Green production of AgNPs and their phytostimulatory impact

Abstract

Abstract Nanoparticles are smaller than nuclei having large surface area and more reactivity. Green production of metals and metal oxide nanoparticles is a benign and sustainable approach. Present work deals with the green production and optimization of nanoparticles by using indigenous plant growth promoting bacteria. Four different methods were used for silver nanoparticles (AgNPs) synthesis, i.e. extracellular, intracellular, oven assisted and extended incubation period. With extended incubation period AgNPs production improved. The nanoparticles synthesized were then applied to Triticum aestivum L. and their phytostimulatory impact was evaluated. The results revealed the growth promotional ability of nanoparticles. It is concluded that nanoparticles stimulate growth of Triticum aestivum L. with significant improvement in shoot length, root length, number of leaves and fresh weight. Thus in the present work we report environmentally benign nanoparticles exhibiting phytostimulatory potential. Biosynthesis of AgNPs by bacteria is a safe easy, less time consuming and economical approach which can be utilized as an alternative method to conventional chemical and physical approaches. Biosynthesized AgNPs can be effectively utilized as environment friendly nanofertilizers for plant growth promotion.