Biochemical Response of Oakleaf Lettuce Seedlings to Different Concentrations of Some Metal(oid) Oxide Nanoparticles
Rita Jurkow , Agnieszka Sękara , Robert Pokluda , Sylwester Smoleń , Andrzej Kalisz
AbstractNanoparticles (NPs) significantly modify the physiological functions and metabolome of plants. The purpose of the study was to investigate the effect of CeO2, Fe2O3, SnO2, TiO2, and SiO2 nanoparticles, applied in foliar spraying of oakleaf lettuce at concentrations 0.75% to 6%, on the antioxidant enzyme activity and content of non-enzymatic antioxidants, chlorophyll pigments, fresh weight (FW) and dry weight (DW). It was found that 3% Fe2O3-NPs caused a 27% decrease in fresh weight compared to control plants. Fe2O3-NPs caused an increase in dry weight (g 100 g−1 FW) when compared to the control for all concentrations, but total DW (g per plant) was similar for all NPs treatments. Significant increases in chlorophyll a + b content after treatment with 1.5% and 6% SiO2-NPs, 3% Fe2O3-NPs, and 3% TiO2-NPs were noted. Fe2O3-NPs caused a significant increase in the activity of ascorbate peroxidase, guaiacol peroxidase, and catalase (only for 3% Fe2O3-NPs). SnO2-NPs decreased ascorbate peroxidase (APX) and guaiacol peroxidase (GPOX) activity (for all tested concentrations) but increased catalase (CAT) activity when a 3% suspension of these NPs was applied. The level of glutathione (GSH) increased due to application of all metal/metalloid oxides, with the exception of SnO2-NPs. When all concentrations of TiO2-NPs were applied, L-ascorbic acid increased significantly, as well as increasing at higher concentrations of SiO2-NPs (3% and 6%) and at 0.75% and 3% Fe2O3-NPs. SiO2-NPs and TiO2-NPs significantly elevated the carotenoid and total phenolic content in treated plants compared to the control. The total antioxidant capacity of plants treated with 3% CeO2-NPs was almost twice as high as that of the control.
|Journal series||Agronomy, [Agronomy], ISSN 2073-4395, e-ISSN 2073-4395, (N/A 100 pkt)|
|Publication size in sheets||0.85|
|Keywords in English||abiotic stress; antioxidants; Lactuca sativa L. var. foliosa; foliar exposure; nanomaterials|
|License||Journal (articles only); author's original; ; after publication|
|Publication indicators||: 2018 = 1.272; : 2019 = 2.603 (2)|
|Finansowanie||This work was financially supported by the Ministry of Science and Higher Education of the Republic of Poland. This paper was also supported by project CZ.02.1.01/0.0/0.0/16_017/0002334 of the Research Infrastructure for Young Scientists, co-financed from the Operational Program for Research, Development and Education, and the Ministry of Education of the Czech Republic|
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