IMPACT OF SILVER NANOPARTICLES ON GERMINATION AND GROWTH FEATURES IN MUNG BEAN PLANT (Vigna radiata)

The present study investigated the effects of different concentrations of silver nanoparticle on various plant growth parameters of Vigna radiata plant.The nanoparticles were synthesized from a bacterium, Klebsiella pneumoniae strain STC4 and were confirmed by UV spectrophotometer and Transmission electron microscope.Various parts of Vigna radiata were subjected to Atomic Absorption Spectrophotometer analysis to study the accumulation of silver nanoparticles.The results showed that small concentrations of silver nanoparticles had a stimulating effect on the growth of plantlets, while the largest concentration induced an inhibitory effect.However, increasing concentration of silver nanoparticles from 2000 to 6000 ppm had led to increase in germination frequency, shoot length, leaf surface area, chlorophyll and carotenoid content.There was no significant difference in root length and number of leaves.In the AAS analysis, it was found that roots of mung bean plant accumulated more silver nanoparticles than other parts indicating its phytostabilization property.