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In the present study, we demonstrate magnetic iron (III) oxide nanoparticles (Fe 2 O 3 NPs) uptake by the Solanum lycopersicum (S. lycopersicum) plant. The S. lycopersicum seeds were coated with Fe 2 O 3 NPs and allowed to germinate in moistened sand bed. The seedlings are observed for 20 days, and then, it was post-treated using different amounts of Fe 2 O 3 NPs in hydroponic solution for 10 days. The plant was allowed to grow in green house for 3 months, and uptake of NPs through roots and translocation into different parts was studied. For this, we have segmented the plants and incubated with 10 % NaOH solution. It is found that the NPs are deposited preferentially in root hairs, root tips followed by nodal and middle zone of plant. The iron present in the whole plant was quantitatively estimated by treating dry biomass of the plant in acid. The Fe 2? /Fe total increased with increasing concentration of NPs and [45 % ferrous iron suggests the biomineralization of NPs due to rich phytochemicals in plants. We believe that the present study is useful to build a base line data for novel applications in agrinanotechnology.