Application of Silicon with Salicylic Acid Up-Regulate Physio-Biochemical Mechanisms of Wheat in Conferring Tolerance to Arsenic Induced Oxidative Stress

IF 2.8 3区材料科学 Q3 CHEMISTRY, PHYSICAL Silicon Pub Date : 2024-09-02 DOI:10.1007/s12633-024-03129-y

Mohamed M. El-Mogy, Hossam S. El-Beltagi, Hayfa Habes Almutairi, Lamy M. M. Hamed, Abdul Sattar, Ahmad Sher, Muhammad Ijaz, Qasim Ali

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Abstract

Arsenic (As) threatens plant growth and human health because its harmful effects are intensified by its persistent presence in the ecosystem. The absorption of As from the contaminated soil leads to accumulation in grains of food crops posing a serious threat to human health. High concentration of As hindered essential physio-biochemical processes of plants that ultimately diminish the growth and yield of crops. Therefore; a pot study was designed to assess synergistic effect of silicon (Si) and salicylic acid (SA) (control-Ck, 4.0 mM Si, 150 µM SA, 4.0 mM Si + 150 µM SA) in mitigating the adversities of As stress in wheat seedlings exposed to As stress (0, and 100 μM). Wheat seedlings exposed to As showed a significant decline in morphological attributes as well as photosynthetic pigments (chlorophyll a, b and carotenoids). However; foliar application of Si and SA considerably increased morphological parameters and leaf photosynthetic pigments under As stress. The imposition of As resulted in enhance accumulation of hydrogen peroxide, MDA, and electrolyte leakage, increased activities of enzymatic antioxidants (superoxide dismutase, peroxidase, and ascorbate peroxidase and catalase) and an elevated accumulation of essential organic osmolytes (free proline, soluble protein, total soluble sugar, total phenolics) in leaves of wheat seedlings. Furthermore, the application of Si + SA resulted in a remarkable increase in the activities of enzymatic antioxidants and accumulation of organic osmolytes. Simultaneously, it reduced the concentration of hydrogen peroxide, MDA, and electrolyte leakage in As-stress wheat seedlings. Under As-stress, sole and combined application of Si and SA caused a significant reduction in arsenic concentration while enhance Si contents in root and shoot of wheat seedlings. In conclusion, synergistic interaction between Si and SA could alleviate the negative impact of As by enhancing the antioxidant defense system, photosynthetic pigments, facilitating osmotic adjustment, and reducing the lipid peroxidation in maize seedlings. The current findings suggest that the combined exogenous application of Si and SA represent a promising approach for promoting the successful cultivation of wheat in As contaminated soil.

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施用硅和水杨酸可提高小麦对砷诱导的氧化应激的耐受性的生理生化机制

砷（As）威胁着植物生长和人类健康，因为它在生态系统中的持久存在加剧了其有害影响。从受污染的土壤中吸收砷会导致砷在粮食作物颗粒中积累，对人类健康构成严重威胁。高浓度的砷会阻碍植物的基本生理生化过程，最终降低作物的生长和产量。因此，我们设计了一项盆栽研究，以评估硅（Si）和水杨酸（SA）（对照组-Ck、4.0 mM Si、150 µM SA、4.0 mM Si + 150 µM SA）在减轻砷胁迫（0 和 100 μM）对小麦幼苗的不利影响方面的协同效应。暴露于砷胁迫的小麦幼苗的形态特征以及光合色素（叶绿素 a、b 和类胡萝卜素）均显著下降。然而，叶面喷施 Si 和 SA 能显著提高 As 胁迫下的形态参数和叶片光合色素。As胁迫导致小麦幼苗叶片中过氧化氢、MDA和电解质渗漏积累增加，酶抗氧化剂（超氧化物歧化酶、过氧化物酶、抗坏血酸过氧化物酶和过氧化氢酶）活性增加，必需有机溶质（游离脯氨酸、可溶性蛋白质、总可溶性糖、总酚类物质）积累增加。此外，施用 Si + SA 能显著提高酶抗氧化剂的活性和有机渗透溶质的积累。同时，它还降低了过氧化氢、MDA 和电解质渗漏的浓度。在砷胁迫条件下，单独施用或联合施用 Si 和 SA 能显著降低砷浓度，同时提高小麦幼苗根部和芽中的 Si 含量。总之，Si 和 SA 的协同作用可通过增强玉米幼苗的抗氧化防御系统、光合色素、促进渗透调节和减少脂质过氧化来减轻砷的负面影响。目前的研究结果表明，联合外源施用 Si 和 SA 是促进小麦在砷污染土壤中成功种植的一种有效方法。

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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.