SELENIUM IN WHEAT PLANT AND SOIL FROM SOUTH-EASTERN PART OF ROMANIA

Selenium is an essential microelement for animal and human nutrition, being involved in many metabolic processes, especially antioxidants, owing to its presence in composition of the glutathion peroxidase enzyme, seems to be the most important. Selenium occurs in thyroidian hormones homeostasis, in the imunity and fertility processes, besides the antioxidant role. Selenium can be present in soil such as selenates, elemental selenium, pyritic selenium and organic compounds of selenium whose composition is unknown. The organic compounds of selenium and selenates are the most available for uptake by plants. Its presence in soil over a certain level (seleniferous soil) can lead to increase of selenium content in plants who grows on respective soil, and in conclusion if we are consume these plants, it can appears toxicological phenomenons - acute or chronic at human body and animals (selenosis). This paper is focused on the South-Eastern part of the Romanian Plain, Central and South Dobrogea, where a study was done regarding low level of selenium in soil and plant, these areas being characterized by a natural handicap, selenium deficitary. For this purpose, data regarding selenium total content in soil and plant (wheat), as well as mobile content selenium from soil, contents determined through investigations chemical methods and analytic techniques, are presented.