Plants13 - TATC to all the other parts of the plant....

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Plants: Essential Processes Water Transport Most of the water that a plant takes in enters through the root hairs. The water diffuses easily (and osmotically) into the root hairs because the concentration of dissolved materials in the plant's cellular cytoplasm is high. As discussed in Plant Classification, Root Hairs, there are two pathways through which water travels from the outside of the root to the core, where it is picked up by the xylem. The first of these pathways is the symplast, in which water moves across the root hair membrane and through the cells themselves, via channels that connect their contents. An alternate route for water is the apoplast, in which water travels along cell walls and through intercellular spaces to reach the core of the root. Once in the xylem, the water can be carried by
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Unformatted text preview: TATC to all the other parts of the plant. Overall, water is transported in the plant through the combined efforts of individual cells and the conductive tissues of the vascular system. Water from the soil enters the root hairs by moving along a water potential gradient and into the xylem through either the apoplast or symplast pathway. It is carried upward through the xylem by transpiration, and then passed into the leaves along another water potential gradient. In the leaf, some water is lost through evaporation from the stomata and the remaining fluid moves along a water potential gradient from the xylem into the phloem, where it is distributed along with the organic nutrients produced by photosynthesis throughout the plant....
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This note was uploaded on 01/27/2012 for the course BIOLOGY BSC1005 taught by Professor Rodriguez during the Winter '09 term at Broward College.

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