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The Movement of water and Solutes in Plants
Member rating: No Rating | Words: | Submitted: Wed Feb 09 2005
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The Movement of water and Solutes in Plants Plants, like most living things, need to exchange gasses and transport minerals and substances to different parts of their structures. Unlike Animals, plants don't have a circulatory system. Diffusion is adequate for plants to exchange gasses, as they have a high surface area to volume ratio. Exchanging gasses is not a problem. The problem is moving water up stems that can be 100's of meters tall without the aid of a pump (such as the heart). The answer is all to do with hydrostatic cohesion. Before we look at how plants transport water and solutes, we must firstly know about the principles of water potential. Water potential Water potential(?) indicates which way water will move in a system. Water will always move from a high ? to a low ?. ? can be measured in Kilopascals (kPa). Pure water has a ? of 0 kPa....
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