Nội dung text 11 Transport in plants ppt - part 2.pdf
• It is the potential energy of water. • It is the measure of the ability of water molecules to move freely in solution. • It is expressed in pressure units such as Pascals (Pa). • Water molecules have kinetic energy. In liquid & gaseous form, they show random, rapid and constant motion. • As the concentration of water in a system increases, its kinetic energy (‘water potential’) also increases. Hence, pure water will have greatest water potential. bankofbiology.com Water Potential (Ψw)