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Salinity stress is one of the major environmental constraints responsible for a reduction in agricultural productivity. This study investigated the effect of exogenously applied nitric oxide (NO) (50 μM and 100 μM) in protecting wheat plants from NaCl-induced oxidative damage by modulating protective mechanisms, including osmolyte accumulation and the antioxidant system. Exogenously sourced NO proved effective in ameliorating the deleterious effects of salinity on the growth parameters studied. NO was beneficial in improving the photosynthetic efficiency, stomatal conductance, and chlorophyll content in normal and NaCl-treated wheat plants. Moreover, NO-treated plants maintained a greater accumulation of proline and soluble sugars, leading to higher relative water content maintenance. Exogenous-sourced NO at both concentrations up-regulated the antioxidant system for averting the NaCl-mediated oxidative damage on membranes. The activity of antioxidant enzymes increased the protection of membrane structural and functional integrity and photosynthetic efficiency. NO application imparted a marked effect on uptake of key mineral elements such as nitrogen (N), potassium (K), and calcium (Ca) with a concomitant reduction in the deleterious ions such as Na+. Greater K and reduced Na uptake in NO-treated plants lead to a considerable decline in the Na/K ratio. Enhancing of salt tolerance by NO was concomitant with an obvious down-regulation in the relative expression of SOS1, NHX1, AQP, and OSM-34, while D2-protein was up-regulated.
Ghalia S. H. Alnusairi; Yasser S. A. Mazrou; Sameer H. Qari; Amr A. Elkelish; Mona H. Soliman; Mohamed Eweis; Khaled Abdelaal; Gomaa Abd El-Samad; Mohamed F. M. Ibrahim; Nihal ElNahhas. Exogenous Nitric Oxide Reinforces Photosynthetic Efficiency, Osmolyte, Mineral Uptake, Antioxidant, Expression of Stress-Responsive Genes and Ameliorates the Effects of Salinity Stress in Wheat. Plants 2021, 10, 1693 .
AMA StyleGhalia S. H. Alnusairi, Yasser S. A. Mazrou, Sameer H. Qari, Amr A. Elkelish, Mona H. Soliman, Mohamed Eweis, Khaled Abdelaal, Gomaa Abd El-Samad, Mohamed F. M. Ibrahim, Nihal ElNahhas. Exogenous Nitric Oxide Reinforces Photosynthetic Efficiency, Osmolyte, Mineral Uptake, Antioxidant, Expression of Stress-Responsive Genes and Ameliorates the Effects of Salinity Stress in Wheat. Plants. 2021; 10 (8):1693.
Chicago/Turabian StyleGhalia S. H. Alnusairi; Yasser S. A. Mazrou; Sameer H. Qari; Amr A. Elkelish; Mona H. Soliman; Mohamed Eweis; Khaled Abdelaal; Gomaa Abd El-Samad; Mohamed F. M. Ibrahim; Nihal ElNahhas. 2021. "Exogenous Nitric Oxide Reinforces Photosynthetic Efficiency, Osmolyte, Mineral Uptake, Antioxidant, Expression of Stress-Responsive Genes and Ameliorates the Effects of Salinity Stress in Wheat." Plants 10, no. 8: 1693.
Understanding the link between the protective role of potassium silicate (K2SiO3) against water shortage and the eventual grain yield of maize plants is still limited under semiarid conditions. Therefore, in this study, we provide insights into the underlying metabolic responses, mineral nutrients uptake and some nonenzymatic and enzymatic antioxidants that may differ in maize plants as influenced by the foliar application of K2SiO3 (0, 1 and 2 mM) under three drip irrigation regimes (100, 75 and 50% of water requirements). Our results indicated that, generally, plants were affected by both moderate and severe deficit irrigation levels. Deficit irrigation decreased shoot dry weight, root dry weight, leaf area index (LAI), relative water content (RWC), N, P, K, Ca, Fe, Zn, carotenoids, grain yield and its parameters, while root/shoot ratio, malondialdehyde (MDA), proline, soluble sugars, ascorbic acid, soluble phenols, peroxidase (POD), catalase (CAT), polyphenol oxidase (PPO), and ascorbate peroxidase (APX) were improved. The foliar applications of K2SiO3 relatively alleviated water stress-induced damage. In this respect, the treatment of 2 mM K2SiO3 was more effective than others and could be recommended to mitigate the effect of deficit irrigation on maize plants. Moreover, correlation analysis revealed a close link between yield and the most studied traits.
Mohamed F. M. Ibrahim; Gomaa Abd El-Samad; Hatem Ashour; Ahmed M. El-Sawy; Mohamed Hikal; Amr Elkelish; Hany Abd El-Gawad; Ahmed Abou El-Yazied; Wael N. Hozzein; Reham Farag. Regulation of Agronomic Traits, Nutrient Uptake, Osmolytes and Antioxidants of Maize as Influenced by Exogenous Potassium Silicate under Deficit Irrigation and Semiarid Conditions. Agronomy 2020, 10, 1212 .
AMA StyleMohamed F. M. Ibrahim, Gomaa Abd El-Samad, Hatem Ashour, Ahmed M. El-Sawy, Mohamed Hikal, Amr Elkelish, Hany Abd El-Gawad, Ahmed Abou El-Yazied, Wael N. Hozzein, Reham Farag. Regulation of Agronomic Traits, Nutrient Uptake, Osmolytes and Antioxidants of Maize as Influenced by Exogenous Potassium Silicate under Deficit Irrigation and Semiarid Conditions. Agronomy. 2020; 10 (8):1212.
Chicago/Turabian StyleMohamed F. M. Ibrahim; Gomaa Abd El-Samad; Hatem Ashour; Ahmed M. El-Sawy; Mohamed Hikal; Amr Elkelish; Hany Abd El-Gawad; Ahmed Abou El-Yazied; Wael N. Hozzein; Reham Farag. 2020. "Regulation of Agronomic Traits, Nutrient Uptake, Osmolytes and Antioxidants of Maize as Influenced by Exogenous Potassium Silicate under Deficit Irrigation and Semiarid Conditions." Agronomy 10, no. 8: 1212.