Abstract Currently, many plant species use nanoparticles as growth stimulants, necessitating a thorough assessment. The main aim of this study was to investigate the impact of copper oxide nanoparticles (Cu NPs) on various growth parameters of the Vigna mungo variety VBN 11. CuO NPs were applied via foliar spray at different concentrations (0, 2, 4, and 8 ppm) 25 days after sowing, with observations recorded at 30 and 45 days after sowing. The results revealed significant improvements in all nine growth traits in plants treated with CuO NPs compared to the control group, with the 4 ppm concentration demonstrating the most substantial effects relative to 0, 2, and 8 ppm concentrations. Our findings suggest that CuO NPs enhance growth and biomass characteristics. SEM and EDX analyses confirmed the presence of CuO NPs, with an average nanoparticle size of 57 nm. Future studies should focus on investigating the effects of CuO NPs on photosynthetic efficiency and the plant's ability to withstand abiotic stress. Graphical abstract
Ashokkumar et al. (Sat,) studied this question.