Root Zones - descriptive names are only partially correct...

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Root Zones In most vascular plants, roots are underground structures that anchor the plant and provide a means  to absorb the nutrients and water needed for growth of the plant body. New root tips grow  continuously throughout the life of the plant and provide the surfaces through which most of the  nutrients and water move. Roots are used as storage organs for the food materials produced by the  shoots. The major functions of roots, thus, can be summarized simply as absorption, conduction,  storage, and anchorage. As cells are added to the tip by repeated cell divisions, a young root elongates and leaves behind  cells that  differentiate  and become the primary roots of the plant. Four areas of the young root  traditionally are recognized, but except for the terminal area, are not distinctly separate. Their 
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Unformatted text preview: descriptive names are only partially correct in describing the activities taking place in each area. These regions, starting at the tip and moving upwards towards the stem, are the root cap , zone of active cell division , zone of cell elongation , and zone of maturation . The first two are compacted in the first centimeter or less of the axis with the latter two no more than 45 centimeters from the tip. Only the root cap and the cell division regions actually move through the soil . After cells start to elongate and mature, no further extension takes place, and the root is stationary for the rest of its life. Figure 1...
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