Arbuscular mycorrhizal fungi regulate the oxidative system,hormones and ionic equilibrium to trigger salt stress tolerance in Cucumis sativus L. |
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Authors: | Abeer Hashem Abdulaziz A. Alqarawi Ramalingam Radhakrishnan Al-Bandari Fahad Al-Arjani Horiah Abdulaziz Aldehaish Dilfuza Egamberdieva Elsayed Fathi Abd_Allah |
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Affiliation: | 1. Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia;2. Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza 12511, Egypt;3. Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia;4. Department of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea;5. Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan |
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Abstract: | Arbuscular mycorrhizal fungi (AMF) association increases plant stress tolerance. This study aimed to determine the mitigation effect of AMF on the growth and metabolic changes of cucumbers under adverse impact of salt stress. Salinity reduced the water content and synthesis of pigments. However, AMF inoculation ameliorated negative effects by enhancing the biomass, synthesis of pigments, activity of antioxidant enzymes, including superoxide dismutase, catalase, ascorbate peroxidase and glutathione reductase, and the content of ascorbic acid, which might be the result of lower level lipid peroxidation and electrolyte leakage. An accumulation of phenols and proline in AMF-inoculated plants also mediated the elimination of superoxide radicals. In addition, jasmonic acid, salicylic acid and several important mineral elements (K, Ca, Mg, Zn, Fe, Mn and Cu) were enhanced with significant reductions in the uptake of deleterious ions like Na+. These results suggested that AMF can protect cucumber growth from salt stress. |
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Keywords: | AMF Lipid peroxidation Antioxidant enzymes Proline Growth hormones NaCl |
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