1. Studying the impact of titanium dioxide nanoparticles on the expression of pivotal genes related to menthol biosynthesis and certain biochemical parameters in peppermint plants (Mentha Piperita L.).
- Author
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Veleshkolaii FR, Gerami M, Younesi-Melerdi E, Moshaei MR, and Ghanbari Hassan Kiadeh S
- Subjects
- Plant Proteins genetics, Plant Proteins metabolism, Plant Leaves metabolism, Plant Leaves drug effects, Plant Leaves genetics, Metal Nanoparticles, Genes, Plant, Hydrogen Peroxide metabolism, Titanium pharmacology, Mentha piperita drug effects, Mentha piperita metabolism, Mentha piperita genetics, Menthol metabolism, Nanoparticles, Gene Expression Regulation, Plant drug effects
- Abstract
Background: This study examines the impact of titanium dioxide nanoparticles (TiO
2 NPs) on gene expression associated with menthol biosynthesis and selected biochemical parameters in peppermint plants (Mentha piperita L.). Menthol, the active ingredient in peppermint, is synthesized through various pathways involving key genes like geranyl diphosphate synthase, menthone reductase, and menthofuran synthase. Seedlings were treated with different concentrations of TiO2 NPs (50, 100, 200, and 300 ppm) via foliar spray. After three weeks of treatment, leaf samples were gathered and kept at -70 °C for analysis., Results: According to our findings, there was a significant elevation (P ≤ 0.05) in proline content at concentrations of 200 and 300 ppm in comparison with the control. Specifically, the highest proline level was registered at 200 ppm, reaching 259.64 ± 33.33 µg/g FW. Additionally, hydrogen peroxide and malondialdehyde content exhibited a decreasing trend following nanoparticle treatments. Catalase activity was notably affected by varying TiO2 NP concentrations, with a significant decrease observed at 200 and 300 ppm compared to the control (P ≤ 0.05). Conversely, at 100 ppm, catalase activity significantly increased (11.035 ± 1.12 units/mg of protein/min). Guaiacol peroxidase activity decreased across all nanoparticle concentrations. Furthermore, RT-qPCR analysis indicated increased expression of the studied genes at 300 ppm concentration., Conclusions: Hence, it can be inferred that at the transcript level, this nanoparticle exhibited efficacy in influencing the biosynthetic pathway of menthol., (© 2024. The Author(s).)- Published
- 2024
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