Physiological and agronomical traits effects of titanium dioxide nanoparticles in seedlings of Solanum lycopersicum L

• Published in: BMC Plant Biology
• Main Authors: Ricardo Tighe-Neira, Marjorie Reyes-Díaz, Adriano Nunes-Nesi, Jaciara Lana-Costa, Gonzalo Recio, Erico R. Carmona, Patricio Acevedo, Zed Rengel, Claudio Inostroza-Blancheteau
• Format: Article in Journal/Newspaper
• Language: English
• Published: BMC 2024
• Subjects: Soluble sugars; Starch; Protein; Biomass; Photosynthesis; Botany; QK1-989; DML
• Online Access: https://doi.org/10.1186/s12870-024-04763-9; https://doaj.org/article/b86e7b916d404399930aedc30d78b2f6

Abstract Background Titanium dioxide nanoparticles (TiO2 NPs) have been reported to have contrasting effects on plant physiology, while their effects on sugar, protein, and amino acid metabolism are poorly understood. In this work, we evaluated the effects of TiO2 NPs on physiological and agronomical traits of tomato (Solanum lycopersicum L.) seedlings. Tomato seeds were treated with TiO2 NPs (1000 and 2000 mg L− 1), TiO2 microparticles (µPs, 2000 mg L− 1) as the size control, and ultrapure water as negative control. Results The dry matter of stems (DMs), leaves (DMl) and total dry matter (DMt) decreased as particle concentration increased. This trend was also observed in the maximum quantum yield of light-adapted photosystem II (PSII) (Fv´/Fm´), the effective quantum yield of PSII (ΦPSII), and net photosynthesis (Pn). The concentrations of sugars, total soluble proteins, and total free amino acids were unaffected, but there were differences in the daily dynamics of these compounds among the treatments. Conclusion Our results suggest that treating tomato seeds with TiO2 might affect PSII performance, net photosynthesis and decrease biomass production, associated with a concentration- and size-related effect of TiO2 particles.