Effect of biologically synthesized silver nanoparticles on growth characteristics and flavonoid contents of Wheat (Triticum aestivum)

Nanoparticles (NPs) are atomic or molecular with dimension 1-100 nm that can modify their physico-chemical properties compared to the bulk material. In present investigation, Ag nanoparticles were synthesized from AgNO3 (20mM concentration) using leaves extracts of Aloe vera and effects of these biologically Ag nanoparticles and Ag at different concentrations (0, 40, 80ppm) were studied on growth characteristics and leaf flavonoid contents of Wheat. Formation of Ag nanoparticles was identified using UV–visible spectroscopy and X-ray diffraction (XRD). Synthesized Ag nanoparticles were confirmed by the absorption maxima at the wavelength of 460 nm. X-ray diffraction (XRD) analysis showed that the size of synthesized silver nanoparticles had 25nm. The result of treatments biologically Ag nanoparticles and Ag at different concentrations on Wheat showed that at 40 80 ppm of Ag nanoparticle and at 80 ppm of Ag increased root and shoot fresh weight. Application of 40, 80ppm of both Ag nanoparticles and Ag increased flavonoid contents at 300, 330nm wavelengths but had no effect flavonoid contents at 270nm wavelength.