Selenium (Se) at high concentrations can cause toxic effects in plants, whereas at low concentrations it enhances resistance to certain abiotic stresses. The possible mechanisms of the Se-enhanced tolerance of plants to salinity stress remain elusive. In this work, effect of Se supplementation at 0, 0.1, 1 and 10 mg l-1 sodium selenate was studied in Lallemantia iberica plants subjected to salt...

The structure and hydrogen bonding of the hydrated selenite, SeO3(2-), and selenate, SeO4(2-), ions have been studied in aqueous solution by large angle X-ray scattering (LAXS), EXAFS and double difference infrared (DDIR) spectroscopy. The mean Se-O bond distances are 1.709(2) and 1.657(2) Å, respectively, as determined by LAXS, and 1.701(3) and 1.643(3) Å by EXAFS. These bond distances are sli...

The reversible phosphorylation of proteins regulates most biological processes, while abnormal phosphorylation is a cause or consequence of many diseases including Alzheimer's disease (AD). One of the hallmarks of AD is the formation of neurofibrillary tangles (NFTs), which is composed of hyperphosphorylated tau proteins. Sodium selenate has been recently found to reduce tau hyperphosphorylatio...

Screening an Arabidopsis (Arabidopsis thaliana) T-DNA mutant library for selenate resistance enabled us to isolate a selenate-resistant mutant line (sel1-11). Molecular and genetic characterization showed that the mutant contained a lesion in the SULTR1;2 gene that encodes a high affinity root sulfate transporter. We showed that SULTR1;2 is the only gene among 13 mutated genes of the Arabidopsi...

We measured potential rates of bacterial dissimilatory reduction of SeO(4) to Se in a diversity of sediment types, with salinities ranging from freshwater (salinity = 1 g/liter) to hypersaline (salinity = 320 g/liter and with pH values ranging from 7.1 to 9.8. Significant biological selenate reduction occurred in all samples with salinities from 1 to 250 g/liter but not in samples with a salini...

Selenate efflux from human placental brush border membrane vesicles was studied using an ion-exchange column assay. Selenate efflux was found to be mediated almost exclusively by a temperature dependent DIDS-sensitive pathway. Chromate markedly inhibited selenate efflux: in contrast medium selenate had no effect. It is concluded that selenate and sulphate share a common pathway for transport ac...

An axenically cultured isolate of single-celled freshwater microalgae (Chlorella sp.) metabolized toxic selenate to volatile dimethylselenide at exceptionally high rates when transferred from mineral-nutrient solution to water for 24 h. The Se-volatilization rates were orders of magnitude higher than those similarly measured for wetland macroalgae and higher plants. Ninety percent of 20 micro m...

Small field plot experiments were carried out at the testing station of Central Control and Testing Institute in Agriculture VeÄžkĂ˝ Meder (Slovakia) experimental years 2014/2015, 2015/2016 2016/2017. Selenium salts form sodium selenite selenate applied growth phases: end tillering (BBCH 29) flag leaf ligule collar visible 39). The effect 2016/2017 on yield wheat grain was not statistically sig...