Effects of silver nanoparticles in some crop plants, Common bean (Phaseolus vulgaris L.) and corn (Zea mays L.)

Abstract

Effects of silver nanoparticles on plant growth parameters such as shoot and root lengths, leaf surface area, chlorophyll, 
carbohydrate and protein contents of economic important pulses, common bean (phaseolus vulgaris L.) and corn (Zea 
mays L.) was probed in the present research. The study was carried out in a randomized block design with three 
replications. Five levels of silver nanoparticles (20, 40, 60, 80 and 100 ppm) were used. After germination, daily supply 
with 15 ml from each concentration was carried out for 12 days during plant growth. The results showed that small 
concentrations of silver nanoparticles had a stimulating effect on the growth of the plantlets, while the enhanced 
concentrations induced an inhibitory effect. However, increasing concentration of silver nanoparticles from 20 to 60 
ppm has led to an increase in shoot and root lengths, leaf surface area, chlorophyll, carbohydrate and protein contents 
of the two tested crop plants. Additionally, the lowest amount of these parameters was found with control plants, but 
the enhancing level of silver nanoparticles resulting in the reduction of these compounds.