Turnover of organic phosphorus

Microbial Turnover of Organic Phosphorus in Aquatic Systems... 

The turnover of organic phosphorus in soil is primarily determined by rates of immobilization and mineralization. Immobilization is the collective term for the bio-... 

While mechanistic studies of transformation processes are important, they must be complemented by kinetic data. The kinetics of these processes provides key information for interpretation of the importance of these processes for aquatic ecosystem ecology. Transformation rates of organic phosphorus need to be determined accurately with labelled substrates or other appropriate methods, because net rates of processing do not allow accurate interpretation of the cycling and importance of certain nutrient species. For example, Hudson et al. (2000) used a novel method to observe rapid turnover of organic phosphorus supporting high rates of production in the absence of phosphate. Traditional measures of net... 

Heath, R. T. 2004. Microbial turnover of organic phosphorus in aquatic environments. In B. L. Turner, E. Frossard, and D. S. Baldwin (eds.) Organic Phosphorus in the Environment. CAB Publishing, Cambridge, MA. pp. 185-204. 

The importance of microbial turnover in organic phosphorus solubilization... 

Benitez-Nelson, C. R. and Buesseler, K. O. (1999). Variability of inorganic and organic phosphorus turnover rates in the coastal ocean. Nature 398, 502-505. 

Within the body, ascorbic acid and minerals have two additional levels of important interaction in the tissue storage and turnover of ascorbic acid and in the synthesis of tissues and organs. The apparent decrease in the half-life of ascorbic acid in the presence of excess iron is an example of the former interaction, whereas the simultaneous participation of vitamin C, calcium, and phosphorus in the formation of growing bone is an example of the latter. 

These ectoenzymes play a significant part in phosphorus cycling in natural waters. In lakes and oceans, phosphorus is partitioned among particulate and dissolved inorganic and organic fractions and is rapidly transformed from one fraction to another. Estimates of the size of the labile dissolved organic phosphorus pool in waters off the coast of Hawaii (0.01-0.2 /rg at P L 1), and its rapid turnover (0.008-0.04 h 1), presumably facilitated by extracellular phosphatases, are comparable with those of PO4- (Smith et al., 1985) and indicate the importance of ectoenzymes in the major nutrient cycles. 

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