The paper investigated the selenium content in seven different infant starting formulae, eight different follow-on formulae and in 15 different special infant formulae, from various producers, all commercially available in Slovenia. The average concentration showed insufficient agreement with the declared value in four out of 30 cases. The paper also found significant variation in selenium content between formulae in the same group. In some cases, large variations between different lots of the same product were found.
Leaves of young chicory plants were sprayed with selenate to establish the distribution of added selenium (Se) in the heads. Its concentration was analyzed in the outer, intermediate, and innermost leaves of chicory heads. The concentration of Se was about double that in the control, indicating that the applied Se was transported from the sprayed leaves to the heads. In cv. Monivip, Se concentration was even throughout the head, but in cv. Anivip, the innermost leaves had a lower concentration of Se.
Two cultivars of common buckwheat, Pyra and Siva, were exposed to three treatments: water deficit (WD), foliar spraying by selenium (Se), and the combination of both. WD slightly negatively affected the yield per plant. The yield was highest in plants exposed to Se only.
Se can increase the tolerance of plants to UV-induced oxidative stress, delay senescence, and promote the growth of ageing seedlings. Recently it has been shown that Se is able to regulate the water status of plants under conditions of drought. Cultivation of plants enriched with Se could be an effective way of producing Se-rich foodstuffs which can be beneficial to health.
It was obtained the adaptation of the micro-PIXE method for analysis of nutritionally relevant heavy elements in different tissues of the grain of common buckwheat (Fagopyrum esculentum), as a representative nutritionally interesting grain food source. These latter contained high concentrations of trace elements, representing 91% of the total grain Zn, 87% for P, 70% for S, 62% for Mg, 60% for K, 54% for Cu, 53% for Mn and 35% for Fe.