Selenium (Se) is a micronutrient which plays beneficial role in plants. Its adsorption at low doses can stimulate plant growth and enhance the plant’s capacity to respond abiotic stresses, such as salinity, drought, cold hot temperature, probably due its antioxidant properties. Here, effect of selenium supplied soil-drench treatments sodium selenate (Na2SeO4) dose 4 mg L−1 (21.17 µM) per was st...

Relevance. The interest of vegetable producers in small-fruited tomato hybrids has been increasing recent years. This is due to the high commercial qualities fruits that do not crack, contain 3 times more sugars than large-fruited tomatoes, and their range use for canning salads also expanded. Goal: identify effective options biologically active substances conditions extended turnover winter gr...

Selenium is essential for many organisms, but is toxic at higher levels. To investigate the genetic basis of selenate tolerance in Arabidopsis thaliana, quantitative trait loci (QTL) associated with selenate tolerance in accessions Landsberg erecta and Columbia were mapped using recombinant inbred lines (RILs). The selenate tolerance index (TI(D10) = root growth + 30 microm selenate/root growth...

The interaction of selenate, selenite, and chromate with the hydrated surface of gamma-Al(2)O(3) was studied using a combination of macroscopic pH edge data, electrophoretic mobility measurements, and X-ray absorption spectroscopic analyses. The pH edge data show generally increased oxyanion adsorption with decreasing pH, and indicate ionic strength-(in)dependent adsorption of chromate and sele...

Enterobacter cloacae SLD1a-1 is capable of reductive detoxification of selenate to elemental selenium under aerobic growth conditions. The initial reductive step is the two-electron reduction of selenate to selenite and is catalyzed by a molybdenum-dependent enzyme demonstrated previously to be located in the cytoplasmic membrane, with its active site facing the periplasmic compartment (C. A. W...

Ralstonia metallidurans CH34, a soil bacterium resistant to a variety of metals, is known to reduce selenite to intracellular granules of elemental selenium (Se(0)). We have studied the kinetics of selenite (Se(IV)) and selenate (Se(VI)) accumulation and used X-ray absorption spectroscopy to identify the accumulated form of selenate, as well as possible chemical intermediates during the transfo...

The uptake, transformation and effects of selenium on natural plankton communities from a freshwater reservoir with a history of selenium contamination were examined. The majority of uptake occurred by particles >0.8 pm, reflecting the dominance of biomass by phytoplankton. Selenium uptake was proportional to plankton biomass and selenium concentration. Short-term uptake (0 to 24 h) of selenite...

The relationships of selenium (Se) with other elements in plants is important for producing functional food high Se contents and a predicted quality. To unveil the peculiarities element interactions, eight botanical varieties Brassica oleracea L. were grown similar conditions or without foliar application sodium selenate. High varietal differences, elicited by supply, recorded regard to accumul...

Selenate was found to have several insulin-like effects in rat adipocytes: stimulation of glucose transport activity by translocation of two types of glucose transporters from intracellular sites to the plasma membrane, stimulation of cAMP phosphodiesterase activity, and stimulation of ribosomal S6 protein phosphorylation. Furthermore, in intact cells addition of 1 mM selenate stimulated tyrosy...