Freire Bruna Moreira, Lange Camila Neves, Cavalcanti Yasmin Tavares, Seabra Amedea Barozzi, Batista Bruno Lemos
Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André 09210-580, SP, Brazil.
Department of Analytical Chemistry, Aragon Institute of Engineering Research (I3A), University of Zaragoza, 50009 Zaragoza, Spain.
Toxics. 2024 Jul 1;12(7):482. doi: 10.3390/toxics12070482.
Nanotechnology has been increasingly used in plant sciences, with engineered nanoparticles showing promising results as fertilizers or pesticides. The present study compared the effects in the foliar application of Se nanoparticles (SeNPs) or sodium selenite-Se(IV) on rice seedlings. The degree of plant growth, photosynthetic pigment content, and concentrations of Se, Na, Mg, K, Ca, Mn, Co, Cu, Zn, As, Cd, and Pb were evaluated. The results showed that the application of SeNPs at high concentrations (5 mg L), as well as the application of Se(IV), inhibited plant growth and increased the root concentrations of As and Pb. The application of SeNPs at 0.5 mg L significantly increased Se accumulation in the aerial part from 0.161 ± 0.028 mg kg to 0.836 ± 0.097 mg kg without influencing physiological, chemical, or biochemical parameters. When applied to leaves, SeNPs tended to remain in the aerial part, while the application of Se(IV) caused a higher Se translocation from the shoots to the roots. This study provides useful information concerning the uptake, accumulation, and translocation of different Se formulations in rice seedlings and their effect on plant ionomic profiles, thus showing that the foliar application of SeNPs at low concentrations can be an effective and safe alternative for rice biofortification.
纳米技术在植物科学中的应用日益广泛，工程纳米颗粒作为肥料或农药显示出良好的效果。本研究比较了叶面喷施硒纳米颗粒（SeNPs）或亚硒酸钠-Se(IV)对水稻幼苗的影响。评估了植物生长程度、光合色素含量以及硒、钠、镁、钾、钙、锰、钴、铜、锌、砷、镉和铅的浓度。结果表明，高浓度（5 mg/L）的SeNPs以及Se(IV)的施用均抑制了植物生长，并增加了根部砷和铅的浓度。0.5 mg/L的SeNPs施用显著增加了地上部分的硒积累，从0.161±0.028 mg/kg增加到0.836±0.097 mg/kg，且不影响生理、化学或生化参数。叶面喷施时，SeNPs倾向于留在地上部分，而Se(IV)的施用导致更多的硒从地上部分向根部转运。本研究提供了有关不同硒制剂在水稻幼苗中的吸收、积累和转运及其对植物离子组学特征影响的有用信息，从而表明低浓度叶面喷施SeNPs可作为水稻生物强化的一种有效且安全的替代方法。
