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Translocation of elements and sugars in wheat genotypes at vegetative and generative stages under continuous selenium exposure
Author(s) -
Filek Maria,
Sieprawska Apolonia,
Telk Anna,
Łabanowska Maria,
Kurdziel Magdalena,
Walas Stanisław,
Hartikainen Helinä
Publication year - 2019
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.9914
Subject(s) - selenium , biofortification , chemistry , micronutrient , fodder , nutrient , food science , oxidative stress , botany , biology , horticulture , biochemistry , organic chemistry
BACKGROUND Biofortification with selenium (Se) elevates its concentration in feed and fodder plants and helps to prevent health problems in animals and humans. The aim of this study was to describe Se‐induced modifications in the accumulation of elements important for the proper functioning of wheat, one of the most popular cereals. The presence of S e correlated with carbohydrate synthesis and electron paramagnetic resonance (EPR). This explained the mechanisms of Se's antioxidant activity. RESULTS Selenium accumulation in vegetative and generative leaves, and in the grains of three wheat genotypes (cv. Parabola, cv. Raweta and cv. Manu), differing in their stress tolerance and grown hydroponically in the presence of 10 or 20 μM Na 2 SeO 4, , was proportional to its content in the medium. Stronger Se accumulation was typical of a stress‐sensitive genotype. Selenium generally promoted the uptake of macronutrients and micronutrients but their distribution depended on tissue and genotype. Changes in the Se‐induced EPR signals of paramagnetic metals and organic radicals corresponded with stress tolerance of the tested genotypes. CONCLUSIONS Se application increased the accumulation of nutrients and carbohydrates that are vital for proper plant growth and development. Accelerated uptake of molybdenum (Mo), an element improving dietary properties of grains, may be an additional advantage of Se fertilization. The mechanisms of Se‐induced changes in removing Mn and iron (Fe) ions from macromolecules may be one of the factors that differentiate plant tolerance to oxidative stress. © 2019 Society of Chemical Industry