Silicon Mitigates Adverse Effects of Drought Stress in Wheat (Triticum aestivum L.) Seedlings
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Institute of Soil Science and Plant Cultivation – State Research Institute in Puławy Department of Weed Science and Tillage Systems in Wrocław, Poland
Wrocław University of Environmental and Life Sciences, Department of Plant Nutrition, Wrocław, Poland
Elżbieta Sacała   

Department of Plant Nutrition, Wrocław University of Environmental and Life Science, C.K. Norwida 25, 50-375, Wrocław, Poland
Submission date: 2020-07-20
Final revision date: 2020-12-30
Acceptance date: 2021-01-20
Online publication date: 2021-08-30
Publication date: 2021-09-22
Pol. J. Environ. Stud. 2021;30(5):4657–4662
The study aimed to examine the effect of silicon on spring wheat subjected to drought stress. The experiment was conducted in hydroponic conditions on 10-day old wheat seedlings. Drought stress was induced by polyethylene glycol (PEG 6000) at the concentration of 10% and 15% added to nutrient medium. Silicon was used in the form of silicic acid (H4SiO4) at the doses of 1.0 and 1.5 mM. Silicon evidently improved growth of all plants. Under stress conditions silicon significantly increased concentration of photosynthetic pigments and lowered malondialdehyde content in leaves. Silicon also had a positive effect on nitrate supply in leaves. Applying silicon, to some extent influenced proline concentration in leaves and soluble carbohydrates content in roots.
Concluding, the application of silicic acid improves growth of wheat seedlings and effectively alleviates the negative effects caused by drought stress.