Engineered nanoparticles (NPs) have recently attracted a lot of attention after being tested in various agricultural plants. This paper reports the green synthesis of CeO NPs and SiO NPs from leaf extracts of Nyctanthes arbor-tristis. The physical characteristics of the produced nanoparticles were then determined using UV-visible spectroscopy, transmission electron microscopy (TEM), fluorescence spectroscopy, and Fourier transform infrared spectroscopy (FTIR). Furthermore, the interaction effects of cerium oxide NPs (C1, C2, and C3) and silicon dioxide NPs (S1, S2, and S3) at 10 mg/L on blackgram (Vigna mungo L.) were evaluated. CeO and SiO NPs treatments enhanced the growth performance of the plants by causing a decrease in superoxide radical (SOR) and HO via improving antioxidant enzymes. These findings imply that the size and shape of CeO and SiO NPs provide defense against oxidative damage to the blackgram.
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