Biofortification of Stevia rebaudiana (Bert.) Plant with Selenium
Szarka, V., Jokai, Z., El-Ramady, H., Abdalla, N., Kaszás, L., Domokos-Szabolcsy, E. (2020). Biofortification of Stevia rebaudiana (Bert.) Plant with Selenium. EKB Journal Management System, 4(Issue 2020), 19-31. doi: 10.21608/jenvbs.2020.25902.1085
Veronika Szarka; Zsuzsa Jokai; Hassan El-Ramady; Neama Abdalla; László Kaszás; Eva Domokos-Szabolcsy. "Biofortification of Stevia rebaudiana (Bert.) Plant with Selenium". EKB Journal Management System, 4, Issue 2020, 2020, 19-31. doi: 10.21608/jenvbs.2020.25902.1085
Szarka, V., Jokai, Z., El-Ramady, H., Abdalla, N., Kaszás, L., Domokos-Szabolcsy, E. (2020). 'Biofortification of Stevia rebaudiana (Bert.) Plant with Selenium', EKB Journal Management System, 4(Issue 2020), pp. 19-31. doi: 10.21608/jenvbs.2020.25902.1085
Szarka, V., Jokai, Z., El-Ramady, H., Abdalla, N., Kaszás, L., Domokos-Szabolcsy, E. Biofortification of Stevia rebaudiana (Bert.) Plant with Selenium. EKB Journal Management System, 2020; 4(Issue 2020): 19-31. doi: 10.21608/jenvbs.2020.25902.1085

Biofortification of Stevia rebaudiana (Bert.) Plant with Selenium

Environment, Biodiversity and Soil Security
Article 3, Volume 4, Issue 2020 - Serial Number 4, 2020, Page 19-31  XML PDF (1.38 MB)
Document Type: Original Article
DOI: 10.21608/jenvbs.2020.25902.1085
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Authors
Veronika Szarka1; Zsuzsa Jokai2; Hassan El-Ramady email orcid 3; Neama Abdalla4; László Kaszás1; Eva Domokos-Szabolcsy1
1Agricultural Botany, Crop Physiology and Biotechnology Dept., Debrecen Univ., Debrecen, Böszörményi u. 138., H-4032, Hungary
2Department of Applied Chemistry, Szent István University, Faculty of Food Science, Budapest, Hungary
3Soil and Water Dept., Kafrelsheikh Uni.
4Plant Biotechnology Department, Genetic Engineering Division, National Research Center, 33-El-Behouth St., 12622 Dokki, Giza, Egypt
Abstract
SELENIUM (Se) essentiality to humans has been recently proved while for higher plants it still gains considerable debating. Biofortification is an effective and safe way to deliver the required micronutrients to humans and / or animals at their adequate concentration. Thus, the present study aimed at enrichment stevia leaf with Se using selenite and selenate as inorganic Se forms at 0, 1, 5, and 10 mg kg-1 concentration range. Also, the released Se into drinks (i.e., water, coffee, and green tea) sweetened by Se-fortified stevia leaf was assessed. None of the two applied selenium forms had positive effect on plant growth in terms of plant growing rate and shoot biomass production in the applied concentration range. Along with it the difference in the toxicity of selenite and selenate forms was clearly visible in the vegetative parameters of the plants. Selenium added as selenite in 10 mg kg-1 concentration totally killed the plants, while lower concentrations (1 - 5 mg kg-1) showed symptoms of distress. Low Se concentration (1 mg kg-1 selenate) induced considerable release of Se from Se-fortified stevia leaves used as sweetener for some drinks including water, coffee, and green tea.
Keywords
Sweetener, Agronomic fortification; Selenite, Selenate, Stress, Toxicity
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