ASSIMILATION OF PHOSPHORUS

 ASSIMILATION OF PHOSPHORUS 

                    Phosphorus is obtained from inorganic or organic phosphate. They are the component of  nucleic acids (DNA & RNA), phospholipids, ATP, coenzymes like NADP , bone and teeth .

They plays an vital role in the regulation gene transcription, activation of enzymes,maintenance of normal ph in the extracellular fluids, and intracellular energy fluids .Inorganic phosphate is incorporated through the formation of ATP in one of the three ways by (1) photophosphorylation , (2) oxidative phosphorylation , and (3) substrate-level phosphorylation. Glycolysis provides an example of the third process . phosphate is joined with glyceraldehyde 3-phosphate to give 1,3-bisphosphoglycerate , which is further used in ATP synthesis .

      Glyceraldehyde 3-P + Pi +NAD+   --------> 1,3 - biposphoglceratte + NADH + H+

       1,3-bisphosphoglycerate + ADP ---------->3-phosphoglycerate + ATP

 

Inorganic phosphorus is found abundant in the rocks . Through weathering and rain breaks the phosphorus in rocks and it travels in the soil and water . When plants and animals consume phosphorus from soil and freshwater it moves into their cell where inorganic phosphorus is converted into organic phosphorus .When an organisms die or excrete the wastes the bacteria converts organic into inorganic phosphate .