The present study was conducted to evaluate the impact of monometallic and bimetallic nanoparticles (NPs) of copper (Cu) and silver (Ag) from on the photochemical efficiency and phenol pattern of . In this study, the existence of localized surface plasmon resonance absorption associated with the nano-sized nature of Ag, Cu and Cu/Ag particles was confirmed by the presence of a single peak around 487, 585, and 487/580 nm respectively. Zeta potential and electrophoretic mobility were found to be 0.2 mV and 0.02 μmcm/(Vs) for synthesized NPs indicating less stability and thus tendency to agglomerate, and broad distribution of particles. Cu-NPs and Cu/Ag-NPs demonstrate that the dispersed phase is stable and has a minimum particle size at zeta potentials above -30 mV. Changes in phenolic compounds, total chlorophyll, and photochemical efficiency in leaves exposed to Ag, Cu and Cu/Ag phyto-nanoparticles were evaluated up to 72 hours. The results revealed that Ag-NP and Cu-NP from at 100 mg/L showed significant reduction in chlorophyll, epidermal polyphenol content and photochemical efficiency of . In contrast, the application of bimetallic Cu/Ag-NP from showed a positive impact on physiological parameters of after 72 h of exposure.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7874825 | PMC |
| http://dx.doi.org/10.1515/biol-2019-0008 | DOI Listing |
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