Phenolic compounds are frequently reported to be the main components of root exudates in response to iron (Fe) deficiency in Strategy I plants, but relatively little is known about their function. Here, we show that removal of secreted phenolics from the root-bathing solution almost completely inhibited the reutilization of apoplastic Fe in roots of red clover (Trifolium pratense). This resulte...

The periodic distribution of known and suspected carcinogenic metal ions is described, and the chemical behavior of various types of metal ions is explained in terms of the general theory of hard and soft acids and bases. The chelate effect is elucidated, and the relatively high stability of metal chelates in very dilute solutions is discussed. The concepts employed for the chelate effect are e...

The presence of ferric chelate reducing activity in sunflower [Helianthus annuus L.) leaves has been studied by submerging leaf discs in a solution with Fe(lll)-ethylenediaminetetra-acetate (FeEDTA), bathophenanthroline disulphonate (BPDS) and vacuum infiltration. The effect of different factors on the Fe(lll) reduction rate was studied. Ferric reduction rate was about 10-fold higher in the lig...

Phytic acid, the main storage form of phosphorous in plants cannot be digested by monogastric animals and is excreted into environment. This compound also has antinutritional effect due to its negative charge which makes it able to chelate minerals and organic elements like calcium, iron, zinc and amino acids to provoke malnutrition. Alarming increase in eutrophication and cost of supplementati...

Organic matter is a widely occurring pollutant in freshwater sources due to the extensive use of synthetic organic compounds industry and natural occurrence Earth’s crust. causes adverse effects on performance water treatment plants, such as accelerated bacterial growth increased consumption chemical coagulants. also has ability chelate some heavy metals forming refractory complexes that resist...