Costa Milton Garcia, de Amorim Cordeiro Rafael, das Mercês Júlia Karoline Rodrigues, de Medeiros Liedson Silva, Cardoso Alexandre Moraes, de Mello Prado Renato, Kadyampakeni Davie M, Siqueira Maria Thalia Lacerda, de Souza Junior Jonas Pereira
Department of Soil Science, School of Agricultural and Veterinary Sciences, São Paulo State University 'Júlio de Mesquita Filho', Via de acesso Prof. Paulo Donato Castellane, Jaboticabal, SP, 14884900, Brazil.
Federal Institute of Education, Science and Technology of Sao Paulo, Av. C Um 250, Barretos, SP, 14781502, Brazil.
Sci Rep. 2025 Jul 2;15(1):23077. doi: 10.1038/s41598-025-07527-z.
The extensive use of glyphosate, while effective in weed control, poses significant risks to non-target plant species such as Handroanthus albus (yellow Ipe), an important species in tropical sustainable forestry. This study aimed to assess the impact of glyphosate on young Ipe plants and to investigate the protective role of silicon (Si) supplementation. Increasing glyphosate concentrations were found to induce heightened cellular electrolyte leakage and reduced concentrations of photosynthetic pigments in young Ipe leaves. Glyphosate exposure also compromised photosynthetic efficiency, resulting in decreased leaf biomass production. Conversely, supplemental applications of Si, applied via root and foliar routes, significantly increased Si accumulation in young Ipe leaves and mitigated the adverse effects of glyphosate. Silicon treatment decreased electrolyte cellular leakage by enhancing antioxidant defenses, particularly through elevated flavonoid and anthocyanin levels, and preserved photosynthetic efficiency. Si-treated plants maintained higher chlorophyll a concentration and exhibited improved photochemical efficiency, even under moderate rates of glyphosate stress. Consequently, Si application led to increased leaf dry mass, particularly at moderate glyphosate concentrations, highlighting its role in enhancing the resilience of young Ipe plants to moderate herbicide-induced stress. Incorporating Si into sustainable forestry practices could enhance the resilience of key species, supporting reforestation and afforestation efforts in glyphosate-prone environments.
草甘膦的广泛使用虽然在杂草控制方面有效，但对非目标植物物种构成了重大风险，如热带可持续林业中的重要物种白花风铃木（黄伊蓓）。本研究旨在评估草甘膦对伊蓓幼苗的影响，并研究补充硅（Si）的保护作用。研究发现，草甘膦浓度的增加会导致伊蓓幼苗叶片细胞电解质渗漏加剧，光合色素浓度降低。草甘膦暴露还会损害光合效率，导致叶片生物量产量下降。相反，通过根部和叶面途径施用硅显著增加了伊蓓幼苗叶片中的硅积累，并减轻了草甘膦的不利影响。硅处理通过增强抗氧化防御，特别是通过提高类黄酮和花青素水平，减少了细胞电解质渗漏，并保持了光合效率。即使在中等草甘膦胁迫水平下，经硅处理的植物仍保持较高的叶绿素a浓度，并表现出改善的光化学效率。因此，施用硅导致叶片干质量增加，特别是在中等草甘膦浓度下，突出了其在增强伊蓓幼苗对中等除草剂诱导胁迫的恢复力方面的作用。将硅纳入可持续林业实践可以增强关键物种的恢复力，支持在易受草甘膦影响的环境中进行的重新造林和造林工作。
