Magaña-López Ernesto, Palos-Barba Viviana, Zuverza-Mena Nubia, Vázquez-Hernández Ma Cristina, White Jason C, Nava-Mendoza Rufino, Feregrino-Pérez Ana A, Torres-Pacheco Irineo, Guevara-González Ramón G
Biosystems Engineering Group, School of Engineering, Autonomous University of Querétaro-Campus Amazcala, Highway Amazcala-Chichimequillas S/N, Km 1, C.P 76265, Amazcala, El Marqués, Querétaro, Mexico.
Center of Applied Physics and Advanced Technology-National Autonomous University of Mexico, Department of Nanotechnology, A.P1-1010, Querétaro, Queretaro, Mexico.
Heliyon. 2022 Mar 4;8(3):e09049. doi: 10.1016/j.heliyon.2022.e09049. eCollection 2022 Mar.
Current agricultural practices for vegetable production are unsustainable, and the use of certain nanomaterials has shown significant potential for either plant growth promotion or defense induction in crop species. The aim of the present work was to evaluate the possible effects of two SBA nano-structured silica materials differing in morphology; SBA-15, with porous structure in parallel and with a highly ordered hexagonal array and SBA-16, with spheric nano-cages located in cubic arrays, as plant growth promoters/eustressors on chili pepper ( L.) during cultivation under greenhouse conditions. The study was carried out at three foliarly applied concentrations (20, 50 and 100 ppm) of either SBA materials to determine effects on seed germination, seedling growth, plant performance and cold tolerance under greenhouse. Phytotoxicity tests were carried out using higher concentrations (100, 1000 and 200 ppm) applied by dipping or spraying onto chili pepper plants. Deionized water controls were included. The results showed that the SBA materials did not affect seed germination; however, SBA-15 at 50 ppm and 100 ppm applied by imbibition significantly increased seedling height (up to 8-fold) and provided enhanced growth performance in comparison with controls under select treatment regimes. Weekly application of SBA-15 at 20 ppm significantly increased stem diameter and cold tolerance; however, SBA-16 showed significant decreases in plant height (20 ppm biweekly applied) and stem diameter (20, 50 and 100 ppm biweekly applied). The results demonstrate that both SBA materials provided hormetic effects in a dose dependent manner on chili pepper production and protection to cold stress. No phytotoxic response was evident. These findings suggested the nanostructured mesoporous silica have potential as a sustainable amendment strategy to increase crop production under stress-inducing cultivation conditions.
当前蔬菜生产的农业实践是不可持续的，而某些纳米材料的使用已显示出在促进作物生长或诱导作物防御方面的巨大潜力。本研究的目的是评估两种形态不同的SBA纳米结构二氧化硅材料；具有平行多孔结构和高度有序六边形阵列的SBA - 15，以及具有立方阵列球形纳米笼的SBA - 16，作为植物生长促进剂/适度应激剂在温室条件下对辣椒（L.）栽培的可能影响。该研究在三种叶面喷施浓度（20、50和100 ppm）的两种SBA材料下进行，以确定对温室条件下种子萌发、幼苗生长、植株性能和耐寒性的影响。通过将较高浓度（100、1000和200 ppm）的材料浸蘸或喷洒到辣椒植株上进行植物毒性测试。设置了去离子水对照。结果表明，SBA材料不影响种子萌发；然而，通过浸种施用50 ppm和100 ppm的SBA - 15显著增加了幼苗高度（高达8倍），并且在选定的处理方案下与对照相比提供了增强的生长性能。每周施用20 ppm的SBA - 15显著增加了茎直径和耐寒性；然而，SBA - 16显示植株高度显著降低（每两周施用20 ppm）以及茎直径显著降低（每两周施用20、50和100 ppm）。结果表明，两种SBA材料均以剂量依赖方式对辣椒生产和抗寒保护产生刺激效应。没有明显的植物毒性反应。这些发现表明，纳米结构介孔二氧化硅有潜力作为一种可持续的改良策略，以在胁迫诱导的栽培条件下提高作物产量。
