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Study on phytotoxicity of nano-iron oxide on germination of mung (Vigna radiata) and gram (Cicer arietinum) seedlings using plant agar method
Shailesh K. Dhoke
Characterization and Application of Nanomaterials 2026, 9(1), 11943; https://doi.org/10.24294/can11943
Submitted:22 Dec 2025
Accepted:11 Mar 2026
Published:31 Mar 2026
Abstract
The present study investigates the effect of nano-Fe2O3 particles as a micronutrient on the growth of plant seedlings of Mung (Vigna radiate) and Gram (Cicer arietinum) using the plant agar method. The laboratory experiment was carried out in the test units comprising a petri dish and plant agar medium. The plant agar medium used acts as a false soil that supports the seedlings for germination, prevents precipitation of water-insoluble nanoparticles and eliminates the possibility of any nutrients from external sources other than the nano-Fe2O3 particles. Each test unit containing agar media was treated with nano-Fe2O3 particle suspension at different concentrations. The effect of nano-Fe2O3 particle dose-response on root and shoot growth of the seedlings, as well as on biomass assay, was examined. The results showed that among the various concentrations of nano-Fe2O3 particles studied, a good agronomic value over control was observed only for certain optimum concentration i.e., 50 mg/L for mung and 5 mg/L for gram seedlings. Beyond this dose limit, the seedlings showed retardation in their growth characteristics, indicating phytotoxicity.
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