Carneiro-Carvalho Andreia, Pinto Teresa, Gomes-Laranjo José, Anjos Rosário
CITAB-Centre for the Research and Technology of Agro-Environmental and Biological Sciences, and Inov4Agro - Institute for Innovation, Capacity Building and Sustainability of Agri-food Production University of Tras-os-Montes and Alto Douro (UTAD), Vila Real, Portugal.
Front Plant Sci. 2023 Jun 26;14:1120226. doi: 10.3389/fpls.2023.1120226. eCollection 2023.
Silicon is an essential mineral nutrient, that plays a crucial role in the metabolic, biochemical, and functional mechanisms of many crops under environmental stress. In the current study, we evaluated the effect of SiK fertilization on the biochemical defense response in plants exposed to water stress. plants were fertilized with different concentrations of potassium silicate (0, 5, 7.5, and 10 mM of SiK) and exposed to a non-irrigation phase and an irrigation phase. The results indicate that silicon promoted the synthesis of soluble proteins and decreased the proline content and the oxidative stress (reduced electrolyte leakage, lipid peroxidation, and hydrogen peroxide accumulation) in tissues, due to an increase in ascorbate peroxidase, catalase, and peroxidase activity, which was accompanied by the rise in total phenol compounds and the number of thiols under drought conditions. This study suggests that exogenous Si applications have a protective role in chestnut plants under water deficit by increasing their resilience to this abiotic stress.
硅是一种必需的矿质营养元素，在环境胁迫下许多作物的代谢、生化和功能机制中发挥着关键作用。在本研究中，我们评估了硅酸钾施肥对遭受水分胁迫的植物生化防御反应的影响。用不同浓度的硅酸钾（0、5、7.5和10 mM硅酸钾）对植物进行施肥，并使其经历非灌溉阶段和灌溉阶段。结果表明，由于抗坏血酸过氧化物酶、过氧化氢酶和过氧化物酶活性增加，硅促进了可溶性蛋白质的合成，并降低了组织中的脯氨酸含量和氧化应激（减少了电解质渗漏、脂质过氧化和过氧化氢积累），同时伴随着干旱条件下总酚类化合物和硫醇数量的增加。本研究表明，外源施硅通过提高栗树对这种非生物胁迫的恢复力，在水分亏缺条件下对栗树起到保护作用。
