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chapter_37_powerpoint - Transport in Plants Chapter 37...

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1 Transport in Plants Chapter 37 Transport in Plants
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2 2 Outline • Overview of Water and Mineral Movement – Water Potential • Water and Mineral Absorption • Water and Mineral Movement • Bidirectional Phloem Transport
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3 3 Overview of Water and Mineral Movement • Most nutrients and water enter plant through roots, and move upward in xylem. – Water moves through spaces between cell protoplasts, plasmodesmata, cell membranes and xylem. • Osmosis is enhanced by aquaporins in vacuole and plasma membranes. – Transpiration “pulls” water through stomata. • cohesion • adhesion
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4 4 Water Movement Through A Plant
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5 5 Overview of Water and Mineral Movement • Water potential pressure potential - physical pressure resulting from water entering cell vacuole solute (osmotic) potential - smallest amount of pressure needed to stop osmosis water potential - total potential energy of water in a plant • water moves to a cell with more negative water potential
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6 6 Determining Water Potential
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7 7 Determining Water Potential
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8 8 Determining Water Potential
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This note was uploaded on 08/03/2010 for the course BIO 1500 taught by Professor Pandolfi during the Fall '08 term at Wayne State University.

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chapter_37_powerpoint - Transport in Plants Chapter 37...

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