Volume 10, Issue 46 (vol. 10, No. 46 2022)                   2022, 10(46): 41-49 | Back to browse issues page

‎ 20.1001.1.23222727.1400.10.46.7.7

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Silicon and Selenium supplementations modulate antioxidant systems and mineral nutrition to mitigate salinity-alkalinity stresses in cucumber (Cucumis Sativus L.) plants under hydroponic conditions
Seyed Ali Asghar Mousavi * 1, Hamid Reza Roosta2 , Majid Esmaeilizadeh3 , Saeid Eshghi4
1- Department of Horticultural Science, Faculty of Agriculture, Vali Asr University, Rafsanjan. Iran , mousavihort@yahoo.com
2- Department of Horticultural Science, Faculty of Agriculture and Natural Resources, Arak University, Arak
3- Department of Horticultural Science, Faculty of Agriculture, Vali Asr University, Rafsanjan. Iran
4- Department of Horticultural Science, Faculty of Agriculture, Shiraz University, Shiraz. Iran
Abstract:   (1195 Views)
This experiments was conducted to investigate the role of silicon (Si, 75, 100 mg. L-1 sodium silicate) and selenium (Se, 4, 6 mg. L-1 sodium selenate) in ameliorating the salinity (75 mM NaCl and 75 mM NaHCO3) causing strong detrimental effects on mineral ions uptake and the oxidative damage in cucumber (Cucumis sativus L.) plants. Salinity and alkalinity stresses reduced macro and micro elements content which were significantly improved by Si and Se supplementation. Furthermore, peroxide hydrogen was more in salinity- alkalinity stressed plants without Si and Se as compared to those supplemented with Si and Se. Si protected cucumber plants from NaCl induced oxidative damage by improving the activity of antioxidant enzymes (glutathione reductase, guaiacol peroxidase, ascorbate peroxidase). More importantly Si and Se supplementation improved the accumulation of P, Mg, Ca, Fe, Zn, Mn and Cu. In conclusion, Si and Se mitigate the negative effects of NaCl and NaHCO3 in cucumber plants by modifying nutrient uptake and up-regulating antioxidant system.
Article number: 5
Keywords: Ascorbate peroxidase, NaCl stress, NaHCO3 stress, Nutrient uptake, Selenate
Full-Text [PDF 648 kb]   (538 Downloads)    
Type of Study: Research | Subject: Salt Stress
Received: 2021/07/10 | Accepted: 2021/09/13 | Published: 2022/02/1
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