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Although the concentration of free cytoplasmic Mg 2+ is on the order of 1 mmol/L, the total Mg 2+ content of animal cells is 30 mmol/L [64] and in plants the content of leaf endodermal cells has been measured at values as high as 100 mmol/L (Stelzer et al., 1990), much of which buffered in storage compartments.
In plants, it has important roles in nucleic acid metabolism, carbohydrate and protein metabolism, cell wall synthesis, cell wall structure, membrane integrity and function, and phenol metabolism. [20] Probably essential to animals, for reasons not well understood. [21] Toxic to both animals and plants. [22] bromine: 35: 5
The current knowledge of the molecular mechanisms for Mg 2+ transport in plants is very limited, with only three publications reporting a molecular basis for Mg 2+ transport in plants. [13] [14] [15] However, the importance of Mg 2+ to plants has been well described, and physiological and ecophysiological studies about the effects of Mg 2+ are ...
Co 2+ - cobalt ions are present in the human body in amounts from 1 to 2 mg. [4] Cobalt is observed in the heart, liver, kidney, and spleen, and considerably smaller quantities in the pancreas, brain, and serum. [4] [5] Cobalt is a necessary component of vitamin B 12 and a fundamental coenzyme of cell mitosis. [5]
Magnesium is the most abundant free cation in plant cytosol, is the central atom in chlorophyll and offers itself as a bridging ion for the aggregation of ribosomes in plants. [7] Even small changes in the concentration of magnesium in plant cytosol or chloroplasts can drastically affect the key enzymes present in the chloroplasts.
The cell plate that is formed during cell division itself develops into middle lamella or lamellum. The middle lamella is made up of calcium and magnesium pectates. [2] In a mature plant cell it is the outermost layer of cell wall. [3] [4] In plants, the pectins form a unified and continuous layer between adjacent cells.
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