Nutrient redistribution

Nutrient redistribution to [(Maximum amount in organ - amount at Varies1 Somda et al., 1999... 

Boddy, L. Watkinson, S. C. (1995). Wood decomposition, higher fungi, and their role in nutrient redistribution. Canadian Journal of Botany, 73 (Suppl.l), S1377-83. 

Biomass Redistribution Associated with Deforestation and Fire. The influence of deforestation on biogeochemical cycles is dependent upon a number of factors associated with the unique characteristics of the ecosystem (climate, soils, topography, etc), the quantity of the total nutrient pool stored in aboveground biomass (Table II), and the level of disturbance (i.e. the degree of canopy removal, soil disturbance, and the quantity of wood or other forest products exported from the site). The quantity of biomass consumed by one or more slash fires following deforestation can also dramatically increase nutrient losses, influence post fire plant succession, and hence, postfire biogeochemical cycles. 

P. J. Hocking, Dry-matter production, mineral nutrient concentrations, and nutrient di.stribution and redistribution in irrigated spring wheat. J. Plant Nntr. / 7 1289 (1994). 

Another possibility for plants to influence the P cycle is the hydraulic redistribution of water. This is the redistribution of water from wet to dry soil areas via the roots, which has been suggested to have an impact on the availability of P due to better mobility of inorganic P in wet soil (Lambers et al. 2006). McCulley et al. (2004) found that the concentration of extractable P was greater at depth than in the top meter of the soil in several arid and semi-arid systems in the southwestern USA and that nutrients were uplifted from this depth. They proposed that hydraulic redistribution of water from the soil surface to depths up to 10 m by roots was the mechanism by which P and other nutrients were mobilized and could be taken up by plants. 

Somda, Z.C., McLaurin, W.J., and Kays, S.J., Jerusalem artichoke growth, development, and field storage. II. Carbon and nutrient element allocation and redistribution, J. Plant Nutr., 22, 1315-1334, 1999. 

In Jerusalem artichoke and other root and tuber crops, a significant portion of the total biomass at harvest is found in the underground storage organs (Kays, 1985 McLaurin et al., 1999 McLaurin and Kays, 1993 Meijer et al., 1993). The internal redistribution of carbon and nutrient elements that accumulate in the stems and leaves of Jerusalem artichoke plays an important role in the development of the tubers (McLaurin et al., 1999 Somda et al., 1999). Similar, but often more complex, accumulation and redistribution patterns occur for carbon and the mineral nutrient... 

The accumulation and redistribution of assimilates can be viewed as changes in dry matter, carbon, individual nutrient elements, or specific compounds (e.g., sucrose) or classes of compounds (e.g., inulins). In the following subsections, the quantitative and temporal accumulation and subsequent redistribution of dry matter, carbon, and nutrient elements in the various locations within the plant are described. 

Percentage Apparent Redistribution of Carbon and Nutrients from Aboveground Parts of the Jerusalem Artichoke... 

Carbon and nutrient element allocation and redistribution, J. Plant Nutr., 22, 1315-1334, 1999. Sprague, H.B., Farris, N.F., and Colby, W.G., The effect of soil conditions and treatment on yields of tubers and sugar from the American artichoke (Helianthus tuberosus), J. Am. Soc. Ag ron., 27, 392-399, 1935. Stauffer, M.D., The potential of Jerusalem artichoke in Manitoba, in Annual Conference Manitoba Agronomics, Manitoba, Canada, 1975, pp. 62-64. 

For some vitamins or trace elements, serum measurement is limited in value, especially in seriously ill patients. This is partly a result of the lack of correlation between the amount of nutrient in the plasma compartment with the amount within the intracellular compartment in most body tissue. For example, there may be substantial stores of particular vitamins or trace elements in individual tissue (e.g., vitamin A in the liver), but mobilization into the plasma is affected by the availability of the appropriate binding proteins or by metabolism. Also, there are differences in the content of individual vitamins or trace elements between tissues, and the serum concentration will not reflect these differences. Fur-tliermore, and particularly important, is the fact that the concentration in plasma can alter rapidly when an acute phase response (APR) to trauma or infection leads to redistribution of metals between body compartments there is increased synthesis of metallothionein, leading to the uptake of zinc into the fiver, and increased synthesis of ferritin causing uptake of iron. The result is a fall in plasma concentration of both zmc and iron. These changes in plasma concentration clearly do not reflect changes in whole body status. 

Deposition of organic-rich sediments further down the shelf and on to the continental slope and rise often occurs as a result of turbidite flows, redistributing organic-rich sediments from delta fronts or from further up the shelf and slope (Summerhayes 1983). While there is a certain amount of pelagic sedimentation, primary production decreases away from the coastline as nutrient levels decline, and detritus is largely recycled before it settles to the sea floor. However, this may not always have been so in the past, when the thermohaline circulation (Box 3.2) did not operate and there may have been widespread anoxia in bottom waters, aiding preservation of sedimentary organic matter (e.g. Cretaceous oceanic anoxic events Section 6.3.4). 

Cholesterol is an important metabolic compound occurring in membranes and lipoproteins. It is also a precursor to bile acids and steroid hormones. The steroid hormones have only small structural differences which cause major differences in functions. This group includes progesterone, testosterone, mineral corticoids, glucorticoids (cortisol), and others. The body has the ability to synthesize and redistribute cholesterol. The main organ that synthesizes cholesterol is the liver. The amount of cholesterol synthesized by the body can be two to three times or more the amount ingested. Cholesterol is not an essential nutrient and can be made in the body from simple compounds via acetyl CoA. 

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