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pressure potential
pressure potential Symbol Ψp. The component of water potential due to the hydrostatic pressure that is exerted on water in a cell. In turgid plant cells it usually has a positive value as the entry of water causes the protoplast to push against the cell wall (see turgor). In xylem cells there is a negative pressure potential, or tension, as a result of transpiration. Water at atmospheric pressure has a pressure potential of zero.
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"pressure potential." A Dictionary of Biology. 2004. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>. "pressure potential." A Dictionary of Biology. 2004. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O6-pressurepotential.html "pressure potential." A Dictionary of Biology. 2004. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-pressurepotential.html |
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pressure potential
pressure potential The hydrostatic pressure to which water in a liquid phase is subjected. It was formerly known as wall pressure or turgor pressure. In a turgid plant cell, pressure potential is usually positive but the pressure potential of xylem in a transpiring plant, which is under considerable tension, will be negative.
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MICHAEL ALLABY. "pressure potential." A Dictionary of Ecology. 2004. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "pressure potential." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O14-pressurepotential.html MICHAEL ALLABY. "pressure potential." A Dictionary of Ecology. 2004. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-pressurepotential.html |
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pressure potential
pressure potential The hydrostatic pressure to which water in a liquid phase is subjected. It was known formerly as wall pressure or turgor pressure. In a turgid plant cell, pressure potential is usually positive but the pressure potential of xylem in a transpiring plant, which is under considerable tension, will be negative.
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Cite this article
MICHAEL ALLABY. "pressure potential." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "pressure potential." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O7-pressurepotential.html MICHAEL ALLABY. "pressure potential." A Dictionary of Plant Sciences. 1998. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-pressurepotential.html |
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