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A Plant Needs Water For Photosynthesis and For Turgidity. Discuss the Methods Used To Move Water and Minerals Through the Roots and Up the Stem.
Member rating: No Rating | Words: | Submitted: Mon Oct 27 2003
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A PLANT NEEDS WATER FOR PHOTOSYNTHESIS AND FOR TURGIDITY. DISCUSS THE METHODS USED TO MOVE WATER AND MINERALS THROUGH THE ROOTS AND UP THE STEM. Water is a necessity for plants. It is required for the transport of mineral salts and organic solutes around the plant. The roots of a plant allow the exchange of substances with the soil environment. The water in the soil contains a weaker solution of mineral salt; therefore this has higher water potential. Inside the vacuole of the root hair, there is a stronger solution of sugars and other dissolved substances' giving the vacuole lower water potential. This enables water to pass from the soil into the root hair cell, down the water potential gradient, by osmosis. The water potential in the root hair cell now increases to higher than that of the neighbouring cells. As a result water, from the root hair cell moves to...
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