RT Journal Article T1 Improving morphological attributes in Petunia hybrida through foliar application of copper nanoparticles under salinity stress A1 Batool, Sana A1 Maryam A1 Naz, Iram T2 Journal of Horticultural Science & Technology AB Salinity stress poses a major challenge to global agriculture, adversely impacting plant growth, yield and quality. Petunia hybrida is a widely grown ornamental plant in urban areas due to its attractive flower colours. Salinity is a major limiting factor for its growth and development as it adversely affects its morphological and physiological attributes. The current study was conducted to assess the mitigation effect of copper nanoparticles (CuNPs) on salinity stress in Petunia hybrida. A pot experiment included two levels of salinity (control and 100 mM NaCl) and two levels of CuNPs (10 mg L-1 and 20 mg L-1). Morphological parameters such as plant surface area, leaf area, root length, shoot length and biomass were measured. The results depicted that the application of CuNPs not only alleviated salinity stress but also enhanced plant growth and biomass. Plants treated with 20 mg L-1 CuNPs under saline conditions exhibited the highest surface area (624.33 cm²), shoot length (21.67 cm), and fresh biomass (46.97 g). Furthermore, CuNPs improved dry biomass and leaf area under both saline and fit soil conditions. The findings highlight the efficacy of CuNPs as a sustainable approach to enhance salinity stress tolerance in petunia, with promising implications for growing ornamental plants and broader agricultural applications. FD 30 June 2023 YR 2023 DO https://doi.org/10.46653/jhst23062025 VO 6 IS 2 SP 25 OP 30 JO J. Hortic. Sci. Technol. LA English SN 2664-9489 UL https://www.pshsciences.org/publications/jhst/issues/6-2/2023-025/