Exogenous Nitric Oxide Reinforces Photosynthetic Efficiency, Osmolyte, Mineral Uptake, Antioxidant, Expression of Stress-Responsive Genes and Ameliorates the Effects of Salinity Stress in Wheat
| Autor: | Nihal ElNahhas, Yasser S. A. Mazrou, Mohamed F. M. Ibrahim, Gomaa Abd El-Samad, Mohamed Eweis, Sameer H. Qari, Ghalia S. H. Alnusairi, Mona H. Soliman, Amr Elkelish, Khaled A. A. Abdelaal |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Stomatal conductance
Antioxidant medicine.medical_treatment chemistry.chemical_element Plant Science Calcium Photosynthetic efficiency Article Nitric oxide chemistry.chemical_compound nitric oxide medicine Food science Proline Ecology Evolution Behavior and Systematics Triticum aestivum L salinity stress Ecology osmolytes Botany photosystem II Salinity Na+/H+ antiporters antioxidant system chemistry Osmolyte QK1-989 |
| Zdroj: | Plants Volume 10 Issue 8 Plants, Vol 10, Iss 1693, p 1693 (2021) |
| ISSN: | 2223-7747 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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