Question

define water potential mention its components

Answer 1

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Answer 2

DEFINITION OF WATER POTENTIAL :

Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure, or matrix effects such as capillary action (which is caused by surface tension). ... A common example is water with a dissolved salt, such as sea water or the fluid in a living cell.

Components of Water Potential -

(i) Pressure Potential

Pressure potential is based on mechanical pressure, and is an important component of the total water potential within plant cells. 

(ii) Osmotic Potential (Solute Potential)

Pure water is usually defined as having an osmotic potential of zero, and in this case, solute potential can never be positive. 

(iii) Matrix Potential (Matric Potential)

When water is in contact with solid particles (e.g., clay or sand particles within soil),adhesive intermolecular forces between the water and the solid can be large and important.

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