WATER RELATIONS Water potential Osmotic potential Pressure potential
![WATER RELATIONS • • • Water potential Osmotic potential Pressure potential Matric potential Absorption WATER RELATIONS • • • Water potential Osmotic potential Pressure potential Matric potential Absorption](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-1.jpg)
![Water Potential • • • Difference b/w free energy of water in that system Water Potential • • • Difference b/w free energy of water in that system](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-2.jpg)
![• • • Unit of measurement: Energy units, Joules per m 3, Pascals • • • Unit of measurement: Energy units, Joules per m 3, Pascals](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-3.jpg)
![Osmosis and Diffusion Osmosis � Movement of water molecules from a region of higher Osmosis and Diffusion Osmosis � Movement of water molecules from a region of higher](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-4.jpg)
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![Water potential = Solute potential + Pressure potential = s + p Water potential Water potential = Solute potential + Pressure potential = s + p Water potential](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-6.jpg)
![Plant cells � Flaccid: Limp-lost water � Turgid: Firm-gained water � Plasmolysis: Plant cell Plant cells � Flaccid: Limp-lost water � Turgid: Firm-gained water � Plasmolysis: Plant cell](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-7.jpg)
![Plant cell Plant cell](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-8.jpg)
![“Cell” 0. 03 M sucrose 0. 02 M glucose Environment: 0. 01 M sucrose “Cell” 0. 03 M sucrose 0. 02 M glucose Environment: 0. 01 M sucrose](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-9.jpg)
![(a) 0. 1 M solution Pure water H 2 O ψP = 0 ψS (a) 0. 1 M solution Pure water H 2 O ψP = 0 ψS](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-10.jpg)
![(b) Positive pressure H 2 O ψP = 0 ψS = 0 ψ = (b) Positive pressure H 2 O ψP = 0 ψS = 0 ψ =](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-11.jpg)
![(c) Increased positive pressure H 2 O ψP = 0. 30 ψP = 0 (c) Increased positive pressure H 2 O ψP = 0. 30 ψP = 0](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-12.jpg)
![Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = − Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = −](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-13.jpg)
![Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = − Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = −](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-14.jpg)
![� Ψs = -i. CRT � i = ionization constant � Sucrose=1. 0 (sucrose � Ψs = -i. CRT � i = ionization constant � Sucrose=1. 0 (sucrose](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-15.jpg)
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- Slides: 18
![WATER RELATIONS Water potential Osmotic potential Pressure potential Matric potential Absorption WATER RELATIONS • • • Water potential Osmotic potential Pressure potential Matric potential Absorption](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-1.jpg)
WATER RELATIONS • • • Water potential Osmotic potential Pressure potential Matric potential Absorption and translocation of water Stomatal regulation.
![Water Potential Difference bw free energy of water in that system Water Potential • • • Difference b/w free energy of water in that system](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-2.jpg)
Water Potential • • • Difference b/w free energy of water in that system and free energy of pure water at atmospheric pressure and a defined temperature. Water potential is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure and matrix effects such as capillary action
![Unit of measurement Energy units Joules per m 3 Pascals • • • Unit of measurement: Energy units, Joules per m 3, Pascals](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-3.jpg)
• • • Unit of measurement: Energy units, Joules per m 3, Pascals Pure water =0 Adding solute lowers potential Less free water molecules Water moves from a higher water potential to a lower water potential Less concentrated (hypotonic) to a more concentrated (hypertonic)
![Osmosis and Diffusion Osmosis Movement of water molecules from a region of higher Osmosis and Diffusion Osmosis � Movement of water molecules from a region of higher](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-4.jpg)
Osmosis and Diffusion Osmosis � Movement of water molecules from a region of higher water potential to a region of lower water potential through a semipermiable membrane. Diffusion • Net movement from one point to another because of random kinetic activities of molecules or ions from a region of their own higher concentration to a region of their lesser concentration. • It is spontaneous process.
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![Water potential Solute potential Pressure potential s p Water potential Water potential = Solute potential + Pressure potential = s + p Water potential](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-6.jpg)
Water potential = Solute potential + Pressure potential = s + p Water potential • Tendency of water to leave the system • Higher water potential, greater tendency to leave • Water passes from one system to the other, through membrane by osmosis Osmotic potential • Solute potential • Pressure that a solution have to build to increase its chemical potential to that of pure water. • Solute potential is always negative. Pressure potential • Equivalent to pumpimg water from one place to another. • If pressure greater than atmospheric pressure is applied to pure water or a solution, its water potential increases.
![Plant cells Flaccid Limplost water Turgid Firmgained water Plasmolysis Plant cell Plant cells � Flaccid: Limp-lost water � Turgid: Firm-gained water � Plasmolysis: Plant cell](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-7.jpg)
Plant cells � Flaccid: Limp-lost water � Turgid: Firm-gained water � Plasmolysis: Plant cell shrinks from cell wall Lost water � Deplasmolysis: Plant cell resumes turgidity Gained water
![Plant cell Plant cell](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-8.jpg)
Plant cell
![Cell 0 03 M sucrose 0 02 M glucose Environment 0 01 M sucrose “Cell” 0. 03 M sucrose 0. 02 M glucose Environment: 0. 01 M sucrose](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-9.jpg)
“Cell” 0. 03 M sucrose 0. 02 M glucose Environment: 0. 01 M sucrose 0. 01 M glucose 0. 01 M fructose
![a 0 1 M solution Pure water H 2 O ψP 0 ψS (a) 0. 1 M solution Pure water H 2 O ψP = 0 ψS](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-10.jpg)
(a) 0. 1 M solution Pure water H 2 O ψP = 0 ψS = 0 ψ = 0 MPa ψP = 0 ψS = − 0. 23 ψ = − 0. 23 MPa
![b Positive pressure H 2 O ψP 0 ψS 0 ψ (b) Positive pressure H 2 O ψP = 0 ψS = 0 ψ =](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-11.jpg)
(b) Positive pressure H 2 O ψP = 0 ψS = 0 ψ = 0 MPa ψP = 0. 23 ψS = − 0. 23 ψ = 0 MPa
![c Increased positive pressure H 2 O ψP 0 30 ψP 0 (c) Increased positive pressure H 2 O ψP = 0. 30 ψP = 0](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-12.jpg)
(c) Increased positive pressure H 2 O ψP = 0. 30 ψP = 0 ψS = − 0. 23 ψS = 0 ψ = 0 MPa ψ = 0. 07 MPa
![Initial flaccid cell ψP 0 ψS 0 7 ψ Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = −](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-13.jpg)
Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = − 0. 7 MPa 0. 4 M sucrose solution: ψP = 0 ψS = − 0. 9 ψ = − 0. 9 MPa Plasmolyzed cell ψP = 0 ψS = − 0. 9 ψ = − 0. 9 MPa (a) Initial conditions: cellular ψ > environmental ψ
![Initial flaccid cell ψP 0 ψS 0 7 ψ Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = −](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-14.jpg)
Initial flaccid cell: ψP = 0 ψS = − 0. 7 ψ = − 0. 7 MPa Pure water: ψP = 0 ψS = 0 ψ = 0 MPa Turgid cell ψP = 0. 7 ψS = − 0. 7 ψ = 0 MPa (b) Initial conditions: cellular ψ < environmental ψ
![Ψs i CRT i ionization constant Sucrose1 0 sucrose � Ψs = -i. CRT � i = ionization constant � Sucrose=1. 0 (sucrose](https://slidetodoc.com/presentation_image_h/36101bca6cc6c6d15456e5a8070687d6/image-15.jpg)
� Ψs = -i. CRT � i = ionization constant � Sucrose=1. 0 (sucrose does not ionize water) � C = Molar concentration (from experiment) � R = Pressure constant (R=0. 0831 liter bars/mole K) � T = temperature in K (273 + C)
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Flaccid cell
Negative water potential
Water potential definition
Water potential
Oncotic vs osmotic
Colloid osmotic pressure vs hydrostatic pressure
Osmolarity and osmolality
Osmotic pressure vs hydrostatic
Colloid osmotic pressure
Electrolytes and nonelectrolytes
Calculate osmotic pressure
Tf=kfm
Osmotic pressure
Raoult's law
Net flow
Fluid dynamics
Dr hassan shah
Water and water and water water
Employee relations in public relations