Contact: Plant Biology and Biotechnology
The study were an attempt to biologically synthesize magnesium and iron oxide nanoparticles and determine their antioxidant activities. Magnesium nanoparticles (MgONPs) and iron oxide nanoparticles (FeONPs) were synthesized using Talinum fruticosum and Jatropha curcas leaf extracts, respectively. The scavenging radicals of the two aqueous leaf extracts used for synthesis and the biosynthesized nanoparticles at 50, 25 and 12.5 mg/ml concentrations were estimated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. The absorbance of the mixture was measured using UV-Vis spectrophotometer at 517 nm wavelength, with Ascorbic acid as standard (positive control). Waterleaf extract has a higher free radical scavenging activity when compared with ascorbic acid while MgONPs have low free radical scavenging ability. The nanoparticles synthesized using Jatropha leaf extract (FeONPs) has higher free radical scavenging activity than the leaf extracts. The optimal concentrations of the various nanoparticles differ for the two biologically synthesized nanoparticles. The findings from this study indicated that FeONPs and waterleaf extracts could act as potential radical scavengers. The future direction of this work is to harness the antioxidant ability of these substances in mitigating oxidative stress in plants and humans, and also to investigate the possibilities of using these substances in the management of phytopathogens, thereby increasing plant productivity.
Keywords: Talinum fruticosum, Jatropha curcas,magnesium, iron oxide,nanoparticles, Antioxidant activities