پديد آورندگان :
Mousavi ، Ali Asghar Vali Asr University - Faculty of Agriculture - Department of Horticultural Science , Roosta ، Hamid Reza Arak University - Faculty of Agriculture and Natural Resources - Department of Horticultural Science , Esmaeilizadeh ، Majid Vali Asr University - Faculty of Agriculture - Department of Horticultural Science , Eshghi ، Saeid Shiraz University - Faculty of Agriculture - Department of Horticultural Science
كليدواژه :
Ascorbate peroxidase , NaCl stress , NaHCO3 stress , Nutrient uptake , Selenate
چكيده فارسي :
Experiments were conducted to investigate the role of silicon (Si, 75, 100 mg. L1 sodium silicate) and selenium (Se, 4, 6 mg. L1 sodium selenate) in ameliorating the salinity (75 mM NaCl and 75 mM NaHCO3) caused 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. Further, 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 upregulating antioxidant system.
