Biocompatible Magnetic Fluid Nanoparticles Internalized in Vegetal Tissue

This experimental study was focused on the study of assimilatory pigments and nucleic acid levels in young plants intended for agricultural use (Zea mays) in presence of water based magnetic fluid in culture medium. The water based magnetic fluid was constituted by coating the small magnetic nanoparticles with perchloric acid and further dispersion in water. Saturation magnetization of our magnetic fluid was of 18.3kA/m; the magnetic nanoparticles volume fraction was of 4.5% while the average particle diameter was equal to 10.55nm. After germination, daily supply with 10mL magnetic fluid aqueous suspension per dish of sample was carried out for 12 days, plant growth being conducted in controlled conditions into a laboratory room. Water based magnetic fluid was added daily in various volume fractions in deionized water (50–100–150–200 and 300μl/l) in the culture medium of Zea mays plantlets in their early ontogenetic stages. Volume fraction of aqueous magnetic fluid solution added in culture medium had a slight inhibitory effect on the growth of the plantlets. We have noticed that toxicity symptoms led to brown spots covering the leaf surface for the enhanced volume fraction of aqueous magnetic fluid solution added by us in the plants culture medium in this experiment. The iron excess treatment is believed to generate oxidative stress in leaf cells. In this case, photosynthesis might be affected leading to decrease of the metabolic process rate.