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Description
Orange-carbon dots (o-CDs) have the potential to enhance photosynthesis and productivity in plants playing an important role in agroindustry1. Therefore, it is of interest to estimate regarding possible oxidative stress they may initiate in plants. This study reports the impact of o-CDs on the parameters of secondary metabolism - total antioxidative activity (TAA) and total phenolic content (TPC) measured in the extract of green bean leaves after foliar o-CDs’ application at 1 and 5 mg/L. The plants were cultivated in the soil in outdoor conditions and the leaves were collected for analysis after three cycles of o-CDs treatments. Both tested parameters are indicators of antioxidative disorder in plants. TAA is related to the contribution of different low-molecular-weight antioxidants including phenolic acids, vitamins, sugars, etc.,2,3 while TPC includes phenolic secondary metabolites and participates in the regulation of plant defense responses.3,4 The results revealed an increased TAA in green beans only after the application of the higher o-CDs concentration. At the same time, the TPC did not change after any of the two applied o-CD concentrations. The results may be evidence of the oxidative stress increase in green bean leaves with enhanced o-CDs concentrations, indicating that the low concentration is more appropriate for use.