Iron is an essential cofactor, but it is also toxic at high levels. In Schizosaccharomyces pombe, the sensor glutaredoxin Grx4 guides the activity of the repressors Php4 and Fep1 to mediate a complex transcriptional response to iron deprivation: activation of Php4 and inactivation of Fep1 leads to inhibition of iron usage/storage, and to promotion of iron import, respectively. However, the mole...

Abstract Iron plaque is a Fe-containing oxide film produced by the oxidation of Fe(II) in rice root system under combined action oxygen infiltration and other microorganisms. Owing to its special surface structure physio-chemical properties, iron has strong absorption capacity for variety heavy metal ions. This study aimed first investigate effects Fe species on geochemical fractionation Tl typ...

The present work is a continuation of our research on the content of heavy metals in the soil of allotment gardens located in the area of . It presents results of the determination of bioavailable and total iron in the soil collected in two allotment gardens in the city. Iron was determined spectrophotometrically in the form of red-pink complex of Fe(II) and 2,2'-dipyridine. The method of deter...

Of the many factors affecting the absorption of iron by plants, the interference of other metal ions appears quite important. Hewitt (8, 9), Nicholas (14,15), and Millikan (12,13) found nickel, cobalt, zinc, and copper to induce iron deficiencies in a number of annual crops. Nicholas found high concentrations of these interfering metals reduced the iron content of the leaves of affected plants....

The major purpose of the present investigation was to study the effects of different concentrations of residual chlorine on serum iron related parameters in rats. Feeding male rats with water containing 80 ppm of residual chlorine daily for 5 days reduced serum levels of ceruloplasmin, copper, iron and hemoglobin by approximately 27%,23%,6% and 4%, respectively. Higher reductions in serum ...

Mutations that lead to a loss of the copper-containing plasma enzyme ceruloplasmin disrupt mammalian iron homeostasis. The mechanism by which ceruloplasmin mobilizes iron from cell stores has been controversial. We demonstrate that injection of a soluble copper-containing yeast protein Fet3p can restore iron homeostasis in phlebotomized mice with a deletion of the ceruloplasmin gene. These resu...

Pedological processes such as gleization and organic matter accumulation may affect the vertical distribution of P within agricultural drainage ditch soils. The objective of this study was to assess the vertical distribution of P as a function of horizonation in ditch soils at the University of Maryland Eastern Shore Research Farm in Princess Anne, Maryland. Twenty-one profiles were sampled fro...